compiler/cpp/src/generate/t_as3_generator.cc

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#include <sstream>
#include <string>
#include <fstream>
#include <iostream>
#include <vector>
#include <cctype>

#include <sys/stat.h>
#include <stdexcept>

#include "platform.h"
#include "t_oop_generator.h"

using std::map;
using std::ofstream;
using std::ostringstream;
using std::string;
using std::stringstream;
using std::vector;

static const string endl = "\n";  // avoid ostream << std::endl flushes

/**
 * AS3 code generator.
 *
 */
class t_as3_generator : public t_oop_generator {
 public:
  t_as3_generator(
      t_program* program,
      const std::map<std::string, std::string>& parsed_options,
      const std::string& option_string)
    : t_oop_generator(program)
  {
    (void) option_string;
    std::map<std::string, std::string>::const_iterator iter;
    
    iter = parsed_options.find("bindable");
    bindable_ = (iter != parsed_options.end());
    
    out_dir_base_ = "gen-as3";
  }

  /**
   * Init and close methods
   */

  void init_generator();
  void close_generator();

  void generate_consts(std::vector<t_const*> consts);

  /**
   * Program-level generation functions
   */

  void generate_typedef (t_typedef*  ttypedef);
  void generate_enum    (t_enum*     tenum);
  void generate_struct  (t_struct*   tstruct);
  void generate_xception(t_struct*   txception);
  void generate_service (t_service*  tservice);

  void print_const_value(std::ofstream& out, std::string name, t_type* type, t_const_value* value, bool in_static, bool defval=false);
  std::string render_const_value(ofstream& out, std::string name, t_type* type, t_const_value* value);

  /**
   * Service-level generation functions
   */

  void generate_as3_struct(t_struct* tstruct, bool is_exception);

  void generate_as3_struct_definition(std::ofstream& out, t_struct* tstruct, bool is_xception=false, bool in_class=false, bool is_result=false);
  //removed -- equality,compare_to
  void generate_as3_struct_reader(std::ofstream& out, t_struct* tstruct);
  void generate_as3_validator(std::ofstream& out, t_struct* tstruct);
  void generate_as3_struct_result_writer(std::ofstream& out, t_struct* tstruct);
  void generate_as3_struct_writer(std::ofstream& out, t_struct* tstruct);
  void generate_as3_struct_tostring(std::ofstream& out, t_struct* tstruct, bool bindable);
  void generate_as3_meta_data_map(std::ofstream& out, t_struct* tstruct);
  void generate_field_value_meta_data(std::ofstream& out, t_type* type);
  std::string get_as3_type_string(t_type* type);
  void generate_reflection_setters(std::ostringstream& out, t_type* type, std::string field_name, std::string cap_name);
  void generate_reflection_getters(std::ostringstream& out, t_type* type, std::string field_name, std::string cap_name);
  void generate_generic_field_getters_setters(std::ofstream& out, t_struct* tstruct);
  void generate_generic_isset_method(std::ofstream& out, t_struct* tstruct);
  void generate_as3_bean_boilerplate(std::ofstream& out, t_struct* tstruct, bool bindable);

  void generate_function_helpers(t_function* tfunction);
  std::string get_cap_name(std::string name);
  std::string generate_isset_check(t_field* field);
  std::string generate_isset_check(std::string field);
  void generate_isset_set(ofstream& out, t_field* field);
  //removed std::string isset_field_id(t_field* field);
  
  void generate_service_interface (t_service* tservice);
  void generate_service_helpers   (t_service* tservice);
  void generate_service_client    (t_service* tservice);
  void generate_service_server    (t_service* tservice);
  void generate_process_function  (t_service* tservice, t_function* tfunction);
  
  /**
   * Serialization constructs
   */

  void generate_deserialize_field        (std::ofstream& out,
                                          t_field*    tfield,
                                          std::string prefix="");

  void generate_deserialize_struct       (std::ofstream& out,
                                          t_struct*   tstruct,
                                          std::string prefix="");

  void generate_deserialize_container    (std::ofstream& out,
                                          t_type*     ttype,
                                          std::string prefix="");

  void generate_deserialize_set_element  (std::ofstream& out,
                                          t_set*      tset,
                                          std::string prefix="");

  void generate_deserialize_map_element  (std::ofstream& out,
                                          t_map*      tmap,
                                          std::string prefix="");

  void generate_deserialize_list_element (std::ofstream& out,
                                          t_list*     tlist,
                                          std::string prefix="");

  void generate_serialize_field          (std::ofstream& out,
                                          t_field*    tfield,
                                          std::string prefix="");

  void generate_serialize_struct         (std::ofstream& out,
                                          t_struct*   tstruct,
                                          std::string prefix="");

  void generate_serialize_container      (std::ofstream& out,
                                          t_type*     ttype,
                                          std::string prefix="");

  void generate_serialize_map_element    (std::ofstream& out,
                                          t_map*      tmap,
                                          std::string iter,
                                          std::string map);

  void generate_serialize_set_element    (std::ofstream& out,
                                          t_set*      tmap,
                                          std::string iter);

  void generate_serialize_list_element   (std::ofstream& out,
                                          t_list*     tlist,
                                          std::string iter);

  void generate_as3_doc                 (std::ofstream& out,
                                          t_doc*     tdoc);

  void generate_as3_doc                 (std::ofstream& out,
                                          t_function* tdoc);

  /**
   * Helper rendering functions
   */

  std::string as3_package();
  std::string as3_type_imports();
  std::string as3_thrift_imports();
  std::string as3_thrift_gen_imports(t_struct* tstruct, string& imports); 
  std::string as3_thrift_gen_imports(t_service* tservice); 
  std::string type_name(t_type* ttype, bool in_container=false, bool in_init=false);
  std::string base_type_name(t_base_type* tbase, bool in_container=false);
  std::string declare_field(t_field* tfield, bool init=false);
  std::string function_signature(t_function* tfunction, std::string prefix="");
  std::string argument_list(t_struct* tstruct);
  std::string type_to_enum(t_type* ttype);
  std::string get_enum_class_name(t_type* type);

  bool type_can_be_null(t_type* ttype) {
    ttype = get_true_type(ttype);

    return
      ttype->is_container() ||
      ttype->is_struct() ||
      ttype->is_xception() ||
      ttype->is_string();
  }

  std::string constant_name(std::string name);

 private:

  /**
   * File streams
   */

  std::string package_name_;
  std::ofstream f_service_;
  std::string package_dir_;
  
  bool bindable_;	
};


/**
 * Prepares for file generation by opening up the necessary file output
 * streams.
 *
 * @param tprogram The program to generate
 */
void t_as3_generator::init_generator() {
  // Make output directory
  MKDIR(get_out_dir().c_str());
  package_name_ = program_->get_namespace("as3");

  string dir = package_name_;
  string subdir = get_out_dir();
  string::size_type loc;
  while ((loc = dir.find(".")) != string::npos) {
    subdir = subdir + "/" + dir.substr(0, loc);
    MKDIR(subdir.c_str());
    dir = dir.substr(loc+1);
  }
  if (dir.size() > 0) {
    subdir = subdir + "/" + dir;
    MKDIR(subdir.c_str());
  }

  package_dir_ = subdir;
}

/**
 * Packages the generated file
 *
 * @return String of the package, i.e. "package org.apache.thriftdemo;"
 */
string t_as3_generator::as3_package() {
  if (!package_name_.empty()) {
    return string("package ") + package_name_ + " ";
  }
  return "";
}

/**
 * Prints standard as3 imports
 *
 * @return List of imports for As3 types that are used in here
 */
string t_as3_generator::as3_type_imports() {
  return
    string() +
    "import org.apache.thrift.Set;\n" +
    "import flash.utils.ByteArray;\n" +
    "import flash.utils.Dictionary;\n\n";
}

/**
 * Prints standard as3 imports
 *
 * @return List of imports necessary for thrift
 */
string t_as3_generator::as3_thrift_imports() {
  return
    string() +
    "import org.apache.thrift.*;\n" +
    "import org.apache.thrift.meta_data.*;\n" +
    "import org.apache.thrift.protocol.*;\n\n";
}

/**
 * Prints imports needed for a given type
 *
 * @return List of imports necessary for a given t_struct
 */
string t_as3_generator::as3_thrift_gen_imports(t_struct* tstruct, string& imports) {

  const vector<t_field*>& members = tstruct->get_members();
  vector<t_field*>::const_iterator m_iter;

  //For each type check if it is from a differnet namespace
  for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
    t_program* program = (*m_iter)->get_type()->get_program();
    if (program != NULL && program != program_) {
      string package = program->get_namespace("as3");
      if (!package.empty()) {
        if (imports.find(package + "." + (*m_iter)->get_type()->get_name()) == string::npos) {
          imports.append("import " + package + "." + (*m_iter)->get_type()->get_name() + ";\n");
        }
      }
    }
  }
  return imports;  
}


/**
 * Prints imports needed for a given type
 *
 * @return List of imports necessary for a given t_service
 */
string t_as3_generator::as3_thrift_gen_imports(t_service* tservice) {
  string imports;
  const vector<t_function*>& functions = tservice->get_functions();
  vector<t_function*>::const_iterator f_iter;

  //For each type check if it is from a differnet namespace
  for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
    t_program* program = (*f_iter)->get_returntype()->get_program();
    if (program != NULL && program != program_) {
      string package = program->get_namespace("as3");
      if (!package.empty()) {
        if (imports.find(package + "." + (*f_iter)->get_returntype()->get_name()) == string::npos) {
          imports.append("import " + package + "." + (*f_iter)->get_returntype()->get_name() + ";\n");
        }
      }
    }

    as3_thrift_gen_imports((*f_iter)->get_arglist(), imports);	    
    as3_thrift_gen_imports((*f_iter)->get_xceptions(), imports);	    

  }
 
  return imports;

}

/**
 * Nothing in As3
 */
void t_as3_generator::close_generator() {}

/**
 * Generates a typedef. This is not done in As3, since it does
 * not support arbitrary name replacements, and it'd be a wacky waste
 * of overhead to make wrapper classes.
 *
 * @param ttypedef The type definition
 */
void t_as3_generator::generate_typedef(t_typedef* ttypedef) {
  (void) ttypedef;
}

/**
 * Enums are a class with a set of static constants.
 *
 * @param tenum The enumeration
 */
void t_as3_generator::generate_enum(t_enum* tenum) {
  // Make output file
  string f_enum_name = package_dir_+"/"+(tenum->get_name())+".as";
  ofstream f_enum;
  f_enum.open(f_enum_name.c_str());

  // Comment and package it
  f_enum <<
    autogen_comment() <<
    as3_package() << endl;
  
  scope_up(f_enum);
  // Add as3 imports
  f_enum << string() +
  "import org.apache.thrift.Set;" << endl <<
  "import flash.utils.Dictionary;" << endl;
  
  indent(f_enum) <<
    "public class " << tenum->get_name() << " ";
  scope_up(f_enum);

  vector<t_enum_value*> constants = tenum->get_constants();
  vector<t_enum_value*>::iterator c_iter;
  for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {
    int value = (*c_iter)->get_value();
    indent(f_enum) <<
      "public static const " << (*c_iter)->get_name() <<
      ":int = " << value << ";" << endl;
  }
  
  // Create a static Set with all valid values for this enum
  f_enum << endl;
  
  indent(f_enum) << "public static const VALID_VALUES:Set = new Set(";
  indent_up();
  bool firstValue = true;
  for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {
    // populate set
    f_enum << (firstValue ? "" : ", ") << (*c_iter)->get_name();
    firstValue = false;
  }
  indent_down();
  f_enum << ");" << endl;

  indent(f_enum) << "public static const VALUES_TO_NAMES:Dictionary = new Dictionary();" << endl;

  scope_up(f_enum);
  for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {
    indent(f_enum) << "VALUES_TO_NAMES[" << (*c_iter)->get_name() << "] = \"" << (*c_iter)->get_name() << "\";" << endl;
  }
  f_enum << endl;
  
  scope_down(f_enum);

  scope_down(f_enum); // end class
  
  scope_down(f_enum); // end package
  
  f_enum.close();
}

/**
 * Generates a class that holds all the constants.
 */
void t_as3_generator::generate_consts(std::vector<t_const*> consts) {
  if (consts.empty()) {
    return;
  }

  string f_consts_name = package_dir_+"/Constants.as";
  ofstream f_consts;
  f_consts.open(f_consts_name.c_str());

  // Print header
  f_consts <<
    autogen_comment() << as3_package();
  
  scope_up(f_consts);
  f_consts << endl;
  
  f_consts << as3_type_imports();

 
  
  indent(f_consts) <<
    "public class Constants {" << endl <<
    endl;
  indent_up();
  vector<t_const*>::iterator c_iter;
  for (c_iter = consts.begin(); c_iter != consts.end(); ++c_iter) {
    print_const_value(f_consts,
                      (*c_iter)->get_name(),
                      (*c_iter)->get_type(),
                      (*c_iter)->get_value(),
                      false);
  }
  indent_down();
  indent(f_consts) <<
    "}" << endl;
  scope_down(f_consts);
  f_consts.close();
}

void t_as3_generator::print_const_value(std::ofstream& out, string name, t_type* type, t_const_value* value, bool in_static, bool defval) {
  type = get_true_type(type);
  
  indent(out);
  if (!defval) {
    out <<
    (in_static ? "var " : "public static const ");
  }
  if (type->is_base_type()) {
    string v2 = render_const_value(out, name, type, value);
    out << name;
    if (!defval) {
      out << ":" << type_name(type);
    }
    out << " = " << v2 << ";" << endl << endl;
  } else if (type->is_enum()) {
    out << name;
    if(!defval) {
      out << ":" << type_name(type);
    }
    out << " = " << value->get_integer() << ";" << endl << endl;
  } else if (type->is_struct() || type->is_xception()) {
    const vector<t_field*>& fields = ((t_struct*)type)->get_members();
    vector<t_field*>::const_iterator f_iter;
    const map<t_const_value*, t_const_value*>& val = value->get_map();
    map<t_const_value*, t_const_value*>::const_iterator v_iter;
    out << name << ":" << type_name(type) << " = new " << type_name(type, false, true) << "();" << endl;
    if (!in_static) {
      indent(out) << "{" << endl;
      indent_up();
      indent(out) << "new function():void {" << endl;
      indent_up();
    }
    for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
      t_type* field_type = NULL;
      for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
        if ((*f_iter)->get_name() == v_iter->first->get_string()) {
          field_type = (*f_iter)->get_type();
        }
      }
      if (field_type == NULL) {
        throw "type error: " + type->get_name() + " has no field " + v_iter->first->get_string();
      }
      string val = render_const_value(out, name, field_type, v_iter->second);
      indent(out) << name << ".";
      out << v_iter->first->get_string() << " = " << val << ";" << endl;
    }
    if (!in_static) {
      indent_down();
      indent(out) << "}();" << endl;
      indent_down();
      indent(out) << "}" << endl;
    }
    out << endl;
  } else if (type->is_map()) {
    out << name;
    if(!defval){
      out << ":" << type_name(type);
    }
    out << " = new " << type_name(type, false, true) << "();" << endl;
    if (!in_static) {
      indent(out) << "{" << endl;
      indent_up();
      indent(out) << "new function():void {" << endl;
      indent_up();
    }
    t_type* ktype = ((t_map*)type)->get_key_type();
    t_type* vtype = ((t_map*)type)->get_val_type();
    const map<t_const_value*, t_const_value*>& val = value->get_map();
    map<t_const_value*, t_const_value*>::const_iterator v_iter;
    for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
      string key = render_const_value(out, name, ktype, v_iter->first);
      string val = render_const_value(out, name, vtype, v_iter->second);
      indent(out) << name << "[" << key << "] = " << val << ";" << endl;
    }
    if (!in_static) {
      indent_down();
      indent(out) << "}();" << endl;
      indent_down();
      indent(out) << "}" << endl;
    }
    out << endl;
  } else if (type->is_list() || type->is_set()) {
    out << name;
    if(!defval) {
      out << ":" << type_name(type);
    }
    out << " = new " << type_name(type, false, true) << "();" << endl;
    if (!in_static) {
      indent(out) << "{" << endl;
      indent_up();
      indent(out) << "new function():void {" << endl;
      indent_up();
    }
    t_type* etype;
    if (type->is_list()) {
      etype = ((t_list*)type)->get_elem_type();
    } else {
      etype = ((t_set*)type)->get_elem_type();
    }
    const vector<t_const_value*>& val = value->get_list();
    vector<t_const_value*>::const_iterator v_iter;
    for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
      string val = render_const_value(out, name, etype, *v_iter);
      indent(out) << name << "." << (type->is_list() ? "push" : "add") << "(" << val << ");" << endl;
    }
    if (!in_static) {
      indent_down();
      indent(out) << "}();" << endl;
      indent_down();
      indent(out) << "}" << endl;
    }
    out << endl;
  } else {
    throw "compiler error: no const of type " + type->get_name();
  }
}

string t_as3_generator::render_const_value(ofstream& out, string name, t_type* type, t_const_value* value) {
  (void) name;
  type = get_true_type(type);
  std::ostringstream render;
  
  if (type->is_base_type()) {
    t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
    switch (tbase) {
        case t_base_type::TYPE_STRING:
          render << '"' << get_escaped_string(value) << '"';
          break;
        case t_base_type::TYPE_BOOL:
          render << ((value->get_integer() > 0) ? "true" : "false");
          break;
        case t_base_type::TYPE_BYTE:
          render << "(byte)" << value->get_integer();
          break;
        case t_base_type::TYPE_I16:
          render << "(short)" << value->get_integer();
          break;
        case t_base_type::TYPE_I32:
          render << value->get_integer();
          break;
        case t_base_type::TYPE_I64:
          render << value->get_integer() << "L";
          break;
        case t_base_type::TYPE_DOUBLE:
          if (value->get_type() == t_const_value::CV_INTEGER) {
            render << "(double)" << value->get_integer();
          } else {
            render << value->get_double();
          }
          break;
        default:
          throw "compiler error: no const of base type " + t_base_type::t_base_name(tbase);
    }
  } else if (type->is_enum()) {
    render << value->get_integer();
  } else {
    string t = tmp("tmp");
    print_const_value(out, t, type, value, true);
    render << t;
  }
  
  return render.str();
}


/**
 * Generates a struct definition for a thrift data type. This is a class
 * with data members, read(), write(), and an inner Isset class.
 *
 * @param tstruct The struct definition
 */
void t_as3_generator::generate_struct(t_struct* tstruct) {
  generate_as3_struct(tstruct, false);
}

/**
 * Exceptions are structs, but they inherit from Exception
 *
 * @param tstruct The struct definition
 */
void t_as3_generator::generate_xception(t_struct* txception) {
  generate_as3_struct(txception, true);
}


/**
 * As3 struct definition.
 *
 * @param tstruct The struct definition
 */
void t_as3_generator::generate_as3_struct(t_struct* tstruct,
                                            bool is_exception) {
  // Make output file
  string f_struct_name = package_dir_+"/"+(tstruct->get_name())+".as";
  ofstream f_struct;
  f_struct.open(f_struct_name.c_str());

  f_struct <<
    autogen_comment() <<
  as3_package();
  
  scope_up(f_struct);
  f_struct << endl;
  
  string imports;

  f_struct <<
    as3_type_imports() <<
    as3_thrift_imports() << 
    as3_thrift_gen_imports(tstruct, imports) << endl;
  
  if (bindable_ && ! is_exception) {
    f_struct << "import flash.events.Event;" << endl <<
    "import flash.events.EventDispatcher;" << endl <<
    "import mx.events.PropertyChangeEvent;" << endl;
  }
  
  generate_as3_struct_definition(f_struct,
                                  tstruct,
                                  is_exception);
  
  scope_down(f_struct); // end of package
  f_struct.close();
}

/**
 * As3 struct definition. This has various parameters, as it could be
 * generated standalone or inside another class as a helper. If it
 * is a helper than it is a static class.
 *
 * @param tstruct      The struct definition
 * @param is_exception Is this an exception?
 * @param in_class     If inside a class, needs to be static class
 * @param is_result    If this is a result it needs a different writer
 */
void t_as3_generator::generate_as3_struct_definition(ofstream &out,
                                                       t_struct* tstruct,
                                                       bool is_exception,
                                                       bool in_class,
                                                       bool is_result) {
  generate_as3_doc(out, tstruct);

  bool is_final = (tstruct->annotations_.find("final") != tstruct->annotations_.end());
  bool bindable = ! is_exception && ! in_class && bindable_;

  indent(out) << (in_class ? "" : "public ") << (is_final ? "final " : "") <<
     "class " << tstruct->get_name() << " ";

  if (is_exception) {
    out << "extends Error ";
  }
  else if (bindable) {
    out << "extends EventDispatcher ";
  }
  out << "implements TBase ";

  scope_up(out);

  indent(out) <<
    "private static const STRUCT_DESC:TStruct = new TStruct(\"" << tstruct->get_name() << "\");" << endl;

  // Members are public for -as3, private for -as3bean
  const vector<t_field*>& members = tstruct->get_members();
  vector<t_field*>::const_iterator m_iter;

  for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
    indent(out) <<
      "private static const " << constant_name((*m_iter)->get_name()) <<
      "_FIELD_DESC:TField = new TField(\"" << (*m_iter)->get_name() << "\", " <<
      type_to_enum((*m_iter)->get_type()) << ", " <<
      (*m_iter)->get_key() << ");" << endl;
  }

  out << endl;

  for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
    generate_as3_doc(out, *m_iter);
    indent(out) << "private var _" << (*m_iter)->get_name() + ":" + type_name((*m_iter)->get_type()) << ";" << endl;

    indent(out) << "public static const " << upcase_string((*m_iter)->get_name()) << ":int = " << (*m_iter)->get_key() << ";" << endl;
  }
  
  out << endl;
  
  // Inner Isset class
  if (members.size() > 0) {
    for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
        if (!type_can_be_null((*m_iter)->get_type())){
          indent(out) <<
            "private var __isset_" << (*m_iter)->get_name() << ":Boolean = false;" <<  endl;
        }
      }
  }
  
  out << endl;
  
  generate_as3_meta_data_map(out, tstruct);
  
  // Static initializer to populate global class to struct metadata map
  indent(out) << "{" << endl;
  indent_up();
  indent(out) << "FieldMetaData.addStructMetaDataMap(" << type_name(tstruct) << ", metaDataMap);" << endl;
  indent_down();
  indent(out) << "}" << endl << endl;

  // Default constructor
  indent(out) <<
  "public function " << tstruct->get_name() << "() {" << endl;
  indent_up();
  for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
    if ((*m_iter)->get_value() != NULL) {
      indent(out) << "this._" << (*m_iter)->get_name() << " = " << (*m_iter)->get_value()->get_integer() << ";" <<
      endl;
    }
  }
  indent_down();
  indent(out) << "}" << endl << endl;
  
  generate_as3_bean_boilerplate(out, tstruct, bindable);
  generate_generic_field_getters_setters(out, tstruct);
  generate_generic_isset_method(out, tstruct);

  generate_as3_struct_reader(out, tstruct);
  if (is_result) {
    generate_as3_struct_result_writer(out, tstruct);
  } else {
    generate_as3_struct_writer(out, tstruct);
  }
  generate_as3_struct_tostring(out, tstruct, bindable);
  generate_as3_validator(out, tstruct);
  scope_down(out);
  out << endl;
}

/**
 * Generates a function to read all the fields of the struct.
 *
 * @param tstruct The struct definition
 */
void t_as3_generator::generate_as3_struct_reader(ofstream& out,
                                                   t_struct* tstruct) {
  out <<
    indent() << "public function read(iprot:TProtocol):void {" << endl;
  indent_up();

  const vector<t_field*>& fields = tstruct->get_members();
  vector<t_field*>::const_iterator f_iter;

  // Declare stack tmp variables and read struct header
  out <<
    indent() << "var field:TField;" << endl <<
    indent() << "iprot.readStructBegin();" << endl;

  // Loop over reading in fields
  indent(out) <<
    "while (true)" << endl;
    scope_up(out);

    // Read beginning field marker
    indent(out) <<
      "field = iprot.readFieldBegin();" << endl;

    // Check for field STOP marker and break
    indent(out) <<
      "if (field.type == TType.STOP) { " << endl;
    indent_up();
    indent(out) <<
      "break;" << endl;
    indent_down();
    indent(out) <<
      "}" << endl;

    // Switch statement on the field we are reading
    indent(out) <<
      "switch (field.id)" << endl;

      scope_up(out);

      // Generate deserialization code for known cases
      for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
        indent(out) <<
          "case " << upcase_string((*f_iter)->get_name()) << ":" << endl;
        indent_up();
        indent(out) <<
          "if (field.type == " << type_to_enum((*f_iter)->get_type()) << ") {" << endl;
        indent_up();

        generate_deserialize_field(out, *f_iter, "this.");
        generate_isset_set(out, *f_iter);
        indent_down();
        out <<
          indent() << "} else { " << endl <<
          indent() << "  TProtocolUtil.skip(iprot, field.type);" << endl <<
          indent() << "}" << endl <<
          indent() << "break;" << endl;
        indent_down();
      }

      // In the default case we skip the field
      out <<
        indent() << "default:" << endl <<
        indent() << "  TProtocolUtil.skip(iprot, field.type);" << endl <<
        indent() << "  break;" << endl;

      scope_down(out);

    // Read field end marker
    indent(out) <<
      "iprot.readFieldEnd();" << endl;

    scope_down(out);

    out <<
      indent() << "iprot.readStructEnd();" << endl << endl;
    
    // in non-beans style, check for required fields of primitive type
    // (which can be checked here but not in the general validate method)
    out << endl << indent() << "// check for required fields of primitive type, which can't be checked in the validate method" << endl;
    for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
      if ((*f_iter)->get_req() == t_field::T_REQUIRED && !type_can_be_null((*f_iter)->get_type())) {
        out <<
          indent() << "if (!__isset_" << (*f_iter)->get_name() << ") {" << endl <<
          indent() << "  throw new TProtocolError(TProtocolError.UNKNOWN, \"Required field '" << (*f_iter)->get_name() << "' was not found in serialized data! Struct: \" + toString());" << endl <<
          indent() << "}" << endl;
      }
    }

    // performs various checks (e.g. check that all required fields are set)
    indent(out) << "validate();" << endl;

  indent_down();
  out <<
    indent() << "}" << endl <<
    endl;
}

// generates as3 method to perform various checks
// (e.g. check that all required fields are set)
void t_as3_generator::generate_as3_validator(ofstream& out,
                                                   t_struct* tstruct){
  indent(out) << "public function validate():void {" << endl;
  indent_up();  
  
  const vector<t_field*>& fields = tstruct->get_members();
  vector<t_field*>::const_iterator f_iter;
  
  out << indent() << "// check for required fields" << endl;
  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    if ((*f_iter)->get_req() == t_field::T_REQUIRED) {
      if (type_can_be_null((*f_iter)->get_type())) {
        indent(out) << "if (" << (*f_iter)->get_name() << " == null) {" << endl;
        indent(out) << "  throw new TProtocolError(TProtocolError.UNKNOWN, \"Required field '" << (*f_iter)->get_name() << "' was not present! Struct: \" + toString());" << endl;
        indent(out) << "}" << endl;
      } else {
        indent(out) << "// alas, we cannot check '" << (*f_iter)->get_name() << "' because it's a primitive and you chose the non-beans generator." << endl;
      }
    }
  }
  
  // check that fields of type enum have valid values
  out << indent() << "// check that fields of type enum have valid values" << endl;
  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    t_field* field = (*f_iter);
    t_type* type = field->get_type();
    // if field is an enum, check that its value is valid
    if (type->is_enum()){
      indent(out) << "if (" << generate_isset_check(field) << " && !" << get_enum_class_name(type) << ".VALID_VALUES.contains(" << field->get_name() << ")){" << endl;
      indent_up();
      indent(out) << "throw new TProtocolError(TProtocolError.UNKNOWN, \"The field '" << field->get_name() << "' has been assigned the invalid value \" + " << field->get_name() << ");" << endl;
      indent_down();
      indent(out) << "}" << endl;
    } 
  }  
  
  indent_down();
  indent(out) << "}" << endl << endl;
}

/**
 * Generates a function to write all the fields of the struct
 *
 * @param tstruct The struct definition
 */
void t_as3_generator::generate_as3_struct_writer(ofstream& out,
                                                   t_struct* tstruct) {
  out <<
    indent() << "public function write(oprot:TProtocol):void {" << endl;
  indent_up();

  string name = tstruct->get_name();
  const vector<t_field*>& fields = tstruct->get_sorted_members();
  vector<t_field*>::const_iterator f_iter;

  // performs various checks (e.g. check that all required fields are set)
  indent(out) << "validate();" << endl << endl;

  indent(out) << "oprot.writeStructBegin(STRUCT_DESC);" << endl;

  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    bool null_allowed = type_can_be_null((*f_iter)->get_type());
    if (null_allowed) {
      out <<
        indent() << "if (this." << (*f_iter)->get_name() << " != null) {" << endl;
      indent_up();
    }

    indent(out) << "oprot.writeFieldBegin(" << constant_name((*f_iter)->get_name()) << "_FIELD_DESC);" << endl;

    // Write field contents
    generate_serialize_field(out, *f_iter, "this.");

    // Write field closer
    indent(out) <<
      "oprot.writeFieldEnd();" << endl;

    if (null_allowed) {
      indent_down();
      indent(out) << "}" << endl;
    }
  }
  // Write the struct map
  out <<
    indent() << "oprot.writeFieldStop();" << endl <<
    indent() << "oprot.writeStructEnd();" << endl;

  indent_down();
  out <<
    indent() << "}" << endl <<
    endl;
}

/**
 * Generates a function to write all the fields of the struct,
 * which is a function result. These fields are only written
 * if they are set in the Isset array, and only one of them
 * can be set at a time.
 *
 * @param tstruct The struct definition
 */
void t_as3_generator::generate_as3_struct_result_writer(ofstream& out,
                                                          t_struct* tstruct) {
  out <<
    indent() << "public function write(oprot:TProtocol):void {" << endl;
  indent_up();

  string name = tstruct->get_name();
  const vector<t_field*>& fields = tstruct->get_sorted_members();
  vector<t_field*>::const_iterator f_iter;

  indent(out) << "oprot.writeStructBegin(STRUCT_DESC);" << endl;

  bool first = true;
  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    if (first) {
      first = false;
      out <<
        endl <<
        indent() << "if ";
    } else {
      out << " else if ";
    }

    out << "(this." << generate_isset_check(*f_iter) << ") {" << endl;

    indent_up();
    
    indent(out) << "oprot.writeFieldBegin(" << constant_name((*f_iter)->get_name()) << "_FIELD_DESC);" << endl;

    // Write field contents
    generate_serialize_field(out, *f_iter, "this.");

    // Write field closer
    indent(out) <<
      "oprot.writeFieldEnd();" << endl;

    indent_down();
    indent(out) << "}";
  }
  // Write the struct map
  out <<
    endl <<
    indent() << "oprot.writeFieldStop();" << endl <<
    indent() << "oprot.writeStructEnd();" << endl;

  indent_down();
  out <<
    indent() << "}" << endl <<
    endl;
}

void t_as3_generator::generate_reflection_getters(ostringstream& out, t_type* type, string field_name, string cap_name) {
  (void) type;
  (void) cap_name;
  indent(out) << "case " << upcase_string(field_name) << ":" << endl;
  indent_up();
  indent(out) << "return this." << field_name << ";" << endl;
  indent_down();
}

void t_as3_generator::generate_reflection_setters(ostringstream& out, t_type* type, string field_name, string cap_name) {
  (void) type;
  (void) cap_name;
  indent(out) << "case " << upcase_string(field_name) << ":" << endl;
  indent_up();
  indent(out) << "if (value == null) {" << endl;
  indent(out) << "  unset" << get_cap_name(field_name) << "();" << endl;
  indent(out) << "} else {" << endl;
  indent(out) << "  this." << field_name << " = value;" << endl;
  indent(out) << "}" << endl;
  indent(out) << "break;" << endl << endl;

  indent_down();
}

void t_as3_generator::generate_generic_field_getters_setters(std::ofstream& out, t_struct* tstruct) {

  std::ostringstream getter_stream;
  std::ostringstream setter_stream;

  // build up the bodies of both the getter and setter at once
  const vector<t_field*>& fields = tstruct->get_members();
  vector<t_field*>::const_iterator f_iter;
  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    t_field* field = *f_iter;
    t_type* type = get_true_type(field->get_type());
    std::string field_name = field->get_name();
    std::string cap_name = get_cap_name(field_name);

    indent_up();
    generate_reflection_setters(setter_stream, type, field_name, cap_name);
    generate_reflection_getters(getter_stream, type, field_name, cap_name);
    indent_down();
  }


  // create the setter
  indent(out) << "public function setFieldValue(fieldID:int, value:*):void {" << endl;
  indent_up();

  indent(out) << "switch (fieldID) {" << endl;

  out << setter_stream.str();

  indent(out) << "default:" << endl;
  indent(out) << "  throw new ArgumentError(\"Field \" + fieldID + \" doesn't exist!\");" << endl;

  indent(out) << "}" << endl;

  indent_down();
  indent(out) << "}" << endl << endl;

  // create the getter
  indent(out) << "public function getFieldValue(fieldID:int):* {" << endl;
  indent_up();

  indent(out) << "switch (fieldID) {" << endl;

  out << getter_stream.str();

  indent(out) << "default:" << endl;
  indent(out) << "  throw new ArgumentError(\"Field \" + fieldID + \" doesn't exist!\");" << endl;

  indent(out) << "}" << endl;

  indent_down();

  indent(out) << "}" << endl << endl;
}

// Creates a generic isSet method that takes the field number as argument
void t_as3_generator::generate_generic_isset_method(std::ofstream& out, t_struct* tstruct){
  const vector<t_field*>& fields = tstruct->get_members();
  vector<t_field*>::const_iterator f_iter;

  // create the isSet method
  indent(out) << "// Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise" << endl;
  indent(out) << "public function isSet(fieldID:int):Boolean {" << endl;
  indent_up();
  indent(out) << "switch (fieldID) {" << endl;

  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    t_field* field = *f_iter;
    indent(out) << "case " << upcase_string(field->get_name()) << ":" << endl;
    indent_up();
    indent(out) << "return " << generate_isset_check(field) << ";" << endl;
    indent_down();
  }

  indent(out) << "default:" << endl;
  indent(out) << "  throw new ArgumentError(\"Field \" + fieldID + \" doesn't exist!\");" << endl;

  indent(out) << "}" << endl;

  indent_down();
  indent(out) << "}" << endl << endl;
}

/**
 * Generates a set of As3 Bean boilerplate functions (setters, getters, etc.)
 * for the given struct.
 *
 * @param tstruct The struct definition
 */
void t_as3_generator::generate_as3_bean_boilerplate(ofstream& out,
                                                      t_struct* tstruct, bool bindable) {
  const vector<t_field*>& fields = tstruct->get_members();
  vector<t_field*>::const_iterator f_iter;
  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    t_field* field = *f_iter;
    t_type* type = get_true_type(field->get_type());
    std::string field_name = field->get_name();
    std::string cap_name = get_cap_name(field_name);
        
    // Simple getter
    generate_as3_doc(out, field);
    indent(out) << "public function get " << field_name << "():" <<
      type_name(type) << " {" << endl;
    indent_up();
    indent(out) << "return this._" << field_name << ";" << endl;
    indent_down();
    indent(out) << "}" << endl << endl;
    
    // Simple setter
    generate_as3_doc(out, field);
    std::string propName = tmp("thriftPropertyChange");
    if (bindable) {
      indent(out) << "[Bindable(event=\"" << propName << "\")]" << endl;
    }
    indent(out) << "public function set " << field_name << "(" << field_name
      << ":" << type_name(type) << "):void {" << endl;
    indent_up();
    indent(out) << "this._" << field_name << " = " << field_name << ";" <<
    endl;
    generate_isset_set(out, field);
    
    if (bindable) {
      // We have to use a custom event rather than the default, because if you use the default,
      // the setter only gets called if the value has changed - this means calling foo.setIntValue(0)
      // will not cause foo.isIntValueSet() to return true since the value of foo._intValue wasn't changed
      // so the setter was never called.
      indent(out) << "dispatchEvent(new Event(\"" << propName << "\"));" << endl;
      
      // However, if you just use a custom event, then collections won't be able to detect when elements
      // in the collections have changed since they listed for PropertyChangeEvents.  So, we dispatch both.
      indent(out) << "dispatchEvent(new PropertyChangeEvent(PropertyChangeEvent.PROPERTY_CHANGE));" << endl;
    }
    indent_down();
    indent(out) << "}" << endl << endl;
    
    // Unsetter
    indent(out) << "public function unset" << cap_name << "():void {" << endl;
    indent_up();
    if (type_can_be_null(type)) {
      indent(out) << "this." << field_name << " = null;" << endl;
    } else {
      indent(out) << "this.__isset_" << field_name << " = false;" << endl;
    }
    indent_down();
    indent(out) << "}" << endl << endl;
    
    // isSet method
    indent(out) << "// Returns true if field " << field_name << " is set (has been assigned a value) and false otherwise" << endl;
    indent(out) << "public function is" << get_cap_name("set") << cap_name << "():Boolean {" << endl;
    indent_up();
    if (type_can_be_null(type)) {
      indent(out) << "return this." << field_name << " != null;" << endl;
    } else {
      indent(out) << "return this.__isset_" << field_name << ";" << endl;
    }
    indent_down();
    indent(out) << "}" << endl << endl;
  }
}

/**
 * Generates a toString() method for the given struct
 *
 * @param tstruct The struct definition
 */
void t_as3_generator::generate_as3_struct_tostring(ofstream& out,
                                                     t_struct* tstruct, bool bindable) {
  // If it's bindable, it extends EventDispatcher so toString is an override.
  out << indent() << "public " << (bindable ? "override " : "") << "function toString():String {" << endl;
  indent_up();

  out <<
    indent() << "var ret:String = new String(\"" << tstruct->get_name() << "(\");" << endl;
  out << indent() << "var first:Boolean = true;" << endl << endl;

  const vector<t_field*>& fields = tstruct->get_members();
  vector<t_field*>::const_iterator f_iter;
  bool first = true;
  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    bool could_be_unset = (*f_iter)->get_req() == t_field::T_OPTIONAL;
    if(could_be_unset) {
      indent(out) << "if (" << generate_isset_check(*f_iter) << ") {" << endl;
      indent_up();
    }

    t_field* field = (*f_iter);

    if (!first) {
      indent(out) << "if (!first) ret +=  \", \";" << endl;
    }
    indent(out) << "ret += \"" << (*f_iter)->get_name() << ":\";" << endl;
    bool can_be_null = type_can_be_null(field->get_type());
    if (can_be_null) {
      indent(out) << "if (this." << (*f_iter)->get_name() << " == null) {" << endl;
      indent(out) << "  ret += \"null\";" << endl;
      indent(out) << "} else {" << endl;
      indent_up();
    }
    
    if (field->get_type()->is_base_type() && ((t_base_type*)(field->get_type()))->is_binary()) {
      indent(out) << "  ret += \"BINARY\";" << endl;
    } else if(field->get_type()->is_enum()) {
      indent(out) << "var " << field->get_name() << "_name:String = " << get_enum_class_name(field->get_type()) << ".VALUES_TO_NAMES[this." << (*f_iter)->get_name() << "];"<< endl;
      indent(out) << "if (" << field->get_name() << "_name != null) {" << endl;
      indent(out) << "  ret += " << field->get_name() << "_name;" << endl;
      indent(out) << "  ret += \" (\";" << endl;
      indent(out) << "}" << endl;
      indent(out) << "ret += this." << field->get_name() << ";" << endl;
      indent(out) << "if (" << field->get_name() << "_name != null) {" << endl;
      indent(out) << "  ret += \")\";" << endl;
      indent(out) << "}" << endl;
    } else {
      indent(out) << "ret += this." << (*f_iter)->get_name() << ";" << endl;
    }
    
    if (can_be_null) {
      indent_down();
      indent(out) << "}" << endl;
    }
    indent(out) << "first = false;" << endl;

    if(could_be_unset) {
      indent_down();
      indent(out) << "}" << endl;
    }
    first = false;
  }
  out <<
    indent() << "ret += \")\";" << endl <<
    indent() << "return ret;" << endl;

  indent_down();
  indent(out) << "}" << endl <<
    endl;
}

/**
 * Generates a static map with meta data to store information such as fieldID to
 * fieldName mapping
 *
 * @param tstruct The struct definition
 */
void t_as3_generator::generate_as3_meta_data_map(ofstream& out,
                                                   t_struct* tstruct) {
  const vector<t_field*>& fields = tstruct->get_members();
  vector<t_field*>::const_iterator f_iter;

  // Static Map with fieldID -> FieldMetaData mappings
  indent(out) << "public static const metaDataMap:Dictionary = new Dictionary();" << endl;

  if (fields.size() > 0) {
    // Populate map
    scope_up(out);
    for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
      t_field* field = *f_iter;
      std::string field_name = field->get_name();
      indent(out) << "metaDataMap[" << upcase_string(field_name) << "] = new FieldMetaData(\"" << field_name << "\", ";

      // Set field requirement type (required, optional, etc.)
      if (field->get_req() == t_field::T_REQUIRED) {
        out << "TFieldRequirementType.REQUIRED, ";
      } else if (field->get_req() == t_field::T_OPTIONAL) {
        out << "TFieldRequirementType.OPTIONAL, ";
      } else {
        out << "TFieldRequirementType.DEFAULT, ";
      }

      // Create value meta data    
      generate_field_value_meta_data(out, field->get_type());
      out  << ");" << endl;
    }
    scope_down(out);
  }
}

/** 
 * Returns a string with the as3 representation of the given thrift type
 * (e.g. for the type struct it returns "TType.STRUCT")
 */
std::string t_as3_generator::get_as3_type_string(t_type* type) {
  if (type->is_list()){
    return "TType.LIST";
  } else if (type->is_map()) {
    return "TType.MAP";
  } else if (type->is_set()) {
    return "TType.SET";
  } else if (type->is_struct() || type->is_xception()) {
    return "TType.STRUCT";
  } else if (type->is_enum()) {
    return "TType.I32";
  } else if (type->is_typedef()) {
    return get_as3_type_string(((t_typedef*)type)->get_type());
  } else if (type->is_base_type()) {
    switch (((t_base_type*)type)->get_base()) {
      case t_base_type::TYPE_VOID   : return      "TType.VOID"; break;
      case t_base_type::TYPE_STRING : return    "TType.STRING"; break;
      case t_base_type::TYPE_BOOL   : return      "TType.BOOL"; break;
      case t_base_type::TYPE_BYTE   : return      "TType.BYTE"; break;
      case t_base_type::TYPE_I16    : return       "TType.I16"; break;
      case t_base_type::TYPE_I32    : return       "TType.I32"; break;
      case t_base_type::TYPE_I64    : return       "TType.I64"; break;
      case t_base_type::TYPE_DOUBLE : return    "TType.DOUBLE"; break;
      default : throw std::runtime_error("Unknown thrift type \"" + type->get_name() + "\" passed to t_as3_generator::get_as3_type_string!"); break; // This should never happen!
    }
  } else {
    throw std::runtime_error("Unknown thrift type \"" + type->get_name() + "\" passed to t_as3_generator::get_as3_type_string!"); // This should never happen!
  }
}

void t_as3_generator::generate_field_value_meta_data(std::ofstream& out, t_type* type){
  out << endl;
  indent_up();
  indent_up();
  if (type->is_struct()){
    indent(out) << "new StructMetaData(TType.STRUCT, " << type_name(type);
  } else if (type->is_container()){
    if (type->is_list()){
      indent(out) << "new ListMetaData(TType.LIST, ";
      t_type* elem_type = ((t_list*)type)->get_elem_type();    
      generate_field_value_meta_data(out, elem_type);   
    } else if (type->is_set()){
      indent(out) << "new SetMetaData(TType.SET, ";
      t_type* elem_type = ((t_list*)type)->get_elem_type();    
      generate_field_value_meta_data(out, elem_type); 
    } else{ // map
      indent(out) << "new MapMetaData(TType.MAP, ";
      t_type* key_type = ((t_map*)type)->get_key_type();
      t_type* val_type = ((t_map*)type)->get_val_type();
      generate_field_value_meta_data(out, key_type);
      out << ", ";
      generate_field_value_meta_data(out, val_type);
    }
  } else {
    indent(out) << "new FieldValueMetaData(" << get_as3_type_string(type);
  }
  out << ")";
  indent_down();
  indent_down();
}


/**
 * Generates a thrift service. In C++, this comprises an entirely separate
 * header and source file. The header file defines the methods and includes
 * the data types defined in the main header file, and the implementation
 * file contains implementations of the basic printer and default interfaces.
 *
 * @param tservice The service definition
 */
void t_as3_generator::generate_service(t_service* tservice) {
  // Make interface file
  string f_service_name = package_dir_+"/"+service_name_+".as";
  f_service_.open(f_service_name.c_str());

  f_service_ <<
    autogen_comment() << as3_package();
  
  scope_up(f_service_);
  
  f_service_ << endl <<
    as3_type_imports() <<
    as3_thrift_imports() <<
    as3_thrift_gen_imports(tservice) << endl;

  generate_service_interface(tservice);

  scope_down(f_service_);
  f_service_.close();
  
  // Now make the implementation/client file
  f_service_name = package_dir_+"/"+service_name_+"Impl.as";
  f_service_.open(f_service_name.c_str());
  
  f_service_ <<
  autogen_comment() << as3_package();
  
  scope_up(f_service_);
  
  f_service_ << endl <<
  as3_type_imports() <<
  as3_thrift_imports() <<
  as3_thrift_gen_imports(tservice) << endl;
  
  generate_service_client(tservice);
  scope_down(f_service_);
  
  f_service_ << as3_type_imports();
  f_service_ << as3_thrift_imports();
  f_service_ << as3_thrift_gen_imports(tservice);
  f_service_ << "import " << package_name_ << ".*;" << endl;
  
  generate_service_helpers(tservice);
  
  f_service_.close();
  
  // Now make the processor/server file
  f_service_name = package_dir_+"/"+service_name_+"Processor.as";
  f_service_.open(f_service_name.c_str());
  
  f_service_ <<
  autogen_comment() << as3_package();
  
  scope_up(f_service_);
  
  f_service_ << endl <<
  as3_type_imports() <<
  as3_thrift_imports() <<
  as3_thrift_gen_imports(tservice) << endl;
  
  generate_service_server(tservice);
  scope_down(f_service_);
  
  f_service_ << as3_type_imports();
  f_service_ << as3_thrift_imports();
  f_service_ << as3_thrift_gen_imports(tservice) <<endl;
  f_service_ << "import " << package_name_ << ".*;" << endl;
  
  generate_service_helpers(tservice);
  
  f_service_.close();
    
}

/**
 * Generates a service interface definition.
 *
 * @param tservice The service to generate a header definition for
 */
void t_as3_generator::generate_service_interface(t_service* tservice) {
  string extends = "";
  string extends_iface = "";
  if (tservice->get_extends() != NULL) {
    extends = type_name(tservice->get_extends());
    extends_iface = " extends " + extends;
  }

  generate_as3_doc(f_service_, tservice);
  f_service_ << indent() << "public interface " << service_name_ << extends_iface <<
    " {" << endl << endl;
  indent_up();
  vector<t_function*> functions = tservice->get_functions();
  vector<t_function*>::iterator f_iter;
  for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
    generate_as3_doc(f_service_, *f_iter);
    if (!(*f_iter)->is_oneway()) {
      if ((*f_iter)->get_returntype()->is_void()) {
        indent(f_service_) << "//function onError(Error):void;" << endl;
        indent(f_service_) << "//function onSuccess():void;" << endl;
      }
      else {
        indent(f_service_) << "//function onError(Error):void;" << endl;
        indent(f_service_) << "//function onSuccess(" << type_name((*f_iter)->get_returntype()) << "):void;" << endl;
      }
    }
    indent(f_service_) << function_signature(*f_iter) << ";" <<
      endl << endl;
  }
  indent_down();
  f_service_ <<
    indent() << "}" << endl <<
    endl;
}

/**
 * Generates structs for all the service args and return types
 *
 * @param tservice The service
 */
void t_as3_generator::generate_service_helpers(t_service* tservice) {
  vector<t_function*> functions = tservice->get_functions();
  vector<t_function*>::iterator f_iter;
  for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
    t_struct* ts = (*f_iter)->get_arglist();
    generate_as3_struct_definition(f_service_, ts, false, true);
    generate_function_helpers(*f_iter);
  }
}

/**
 * Generates a service client definition.
 *
 * @param tservice The service to generate a server for.
 */
void t_as3_generator::generate_service_client(t_service* tservice) {
  string extends = "";
  string extends_client = "";
  if (tservice->get_extends() != NULL) {
    extends = type_name(tservice->get_extends());
    extends_client = " extends " + extends + "Impl";
  }

  indent(f_service_) <<
    "public class " << service_name_ << "Impl" << extends_client << " implements " << service_name_ << " {" << endl;
  indent_up();

  indent(f_service_) <<
    "public function " << service_name_ << "Impl" << "(iprot:TProtocol, oprot:TProtocol=null)" << endl;
  scope_up(f_service_);
  if (extends.empty()) {
    f_service_ <<
      indent() << "iprot_ = iprot;" << endl;
    f_service_ << indent() << "if (oprot == null) {" << endl;
    indent_up();
    f_service_ << indent() << "oprot_ = iprot;" << endl;
    indent_down();
    f_service_ << indent() << "} else {" << endl;
    indent_up();
    f_service_ << indent() << "oprot_ = oprot;" << endl;
    indent_down();
    f_service_ << indent() << "}";
  } else {
    f_service_ <<
      indent() << "super(iprot, oprot);" << endl;
  }
  scope_down(f_service_);
  f_service_ << endl;

  if (extends.empty()) {
    f_service_ <<
      indent() << "protected var iprot_:TProtocol;"  << endl <<
      indent() << "protected var oprot_:TProtocol;"  << endl <<
      endl <<
      indent() << "protected var seqid_:int;" << endl <<
      endl;

    indent(f_service_) <<
      "public function getInputProtocol():TProtocol" << endl;
    scope_up(f_service_);
    indent(f_service_) <<
      "return this.iprot_;" << endl;
    scope_down(f_service_);
    f_service_ << endl;

    indent(f_service_) <<
      "public function getOutputProtocol():TProtocol" << endl;
    scope_up(f_service_);
    indent(f_service_) <<
      "return this.oprot_;" << endl;
    scope_down(f_service_);
    f_service_ << endl;

  }

  // Generate client method implementations
  vector<t_function*> functions = tservice->get_functions();
  vector<t_function*>::const_iterator f_iter;
  for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
    string funname = (*f_iter)->get_name();

    // Open function
    if (!(*f_iter)->is_oneway()) {
      if ((*f_iter)->get_returntype()->is_void()) {
        indent(f_service_) << "//function onError(Error):void;" << endl;
        indent(f_service_) << "//function onSuccess():void;" << endl;
      }
      else {
        indent(f_service_) << "//function onError(Error):void;" << endl;
        indent(f_service_) << "//function onSuccess(" << type_name((*f_iter)->get_returntype()) << "):void;" << endl;
      }
    }
    indent(f_service_) <<
      "public " << function_signature(*f_iter) << endl;
    scope_up(f_service_);


    // Get the struct of function call params
    t_struct* arg_struct = (*f_iter)->get_arglist();
    
    string argsname = (*f_iter)->get_name() + "_args";
    vector<t_field*>::const_iterator fld_iter;
    const vector<t_field*>& fields = arg_struct->get_members();

    // Serialize the request
    f_service_ <<
      indent() << "oprot_.writeMessageBegin(new TMessage(\"" << funname << "\", TMessageType.CALL, seqid_));" << endl <<
      indent() << "var args:" << argsname << " = new " << argsname << "();" << endl;

    for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {
      f_service_ <<
        indent() << "args." << (*fld_iter)->get_name() << " = " << (*fld_iter)->get_name() << ";" << endl;
    }

    f_service_ <<
      indent() << "args.write(oprot_);" << endl <<
    indent() << "oprot_.writeMessageEnd();" << endl;
    
    if ((*f_iter)->is_oneway()) {
      f_service_ << indent() << "oprot_.getTransport().flush();" << endl;
    }
    else {
      f_service_ << indent() << "oprot_.getTransport().flush(function(error:Error):void {" << endl;
      indent_up();
      f_service_ << indent() << "try {" << endl;
      indent_up();
      string resultname = (*f_iter)->get_name() + "_result";
      f_service_ <<
        indent() << "if (error != null) {" << endl <<
        indent() << "  if (onError != null) onError(error);" << endl <<
        indent() << "  return;" << endl <<
        indent() << "}" << endl <<
        indent() << "var msg:TMessage = iprot_.readMessageBegin();" << endl <<
        indent() << "if (msg.type == TMessageType.EXCEPTION) {" << endl <<
        indent() << "  var x:TApplicationError = TApplicationError.read(iprot_);" << endl <<
        indent() << "  iprot_.readMessageEnd();" << endl <<
        indent() << "  if (onError != null) onError(x);" << endl <<
        indent() << "  return;" << endl <<
        indent() << "}" << endl <<
        indent() << "var result :" << resultname << " = new " << resultname << "();" << endl <<
        indent() << "result.read(iprot_);" << endl <<
        indent() << "iprot_.readMessageEnd();" << endl;

      // Careful, only return _result if not a void function
      if (!(*f_iter)->get_returntype()->is_void()) {
        f_service_ <<
          indent() << "if (result." << generate_isset_check("success") << ") {" << endl <<
          indent() << "  if (onSuccess != null) onSuccess(result.success);" << endl <<
          indent() << "  return;" << endl <<
          indent() << "}" << endl;
      }

      t_struct* xs = (*f_iter)->get_xceptions();
      const std::vector<t_field*>& xceptions = xs->get_members();
      vector<t_field*>::const_iterator x_iter;
      for (x_iter = xceptions.begin(); x_iter != xceptions.end(); ++x_iter) {
        f_service_ <<
          indent() << "if (result." << (*x_iter)->get_name() << " != null) {" << endl <<
          indent() << "  if (onError != null) onError(result." << (*x_iter)->get_name() << ");" << endl <<
          indent() << "  return;" << endl <<
          indent() << "}" << endl;
      }

      // If you get here it's an exception, unless a void function
      if ((*f_iter)->get_returntype()->is_void()) {
        f_service_ <<
          indent() << "if (onSuccess != null) onSuccess();" << endl <<
          indent() << "return;" << endl;
      } else {
        
        f_service_ <<
          indent() << "if (onError != null) onError(new TApplicationError(TApplicationError.MISSING_RESULT, \"" << (*f_iter)->get_name() << " failed: unknown result\"));" << endl;
      }
      indent_down();
      f_service_ << indent() << "} catch (e:TError) {" << endl <<
        indent() << "  if (onError != null) onError(e);" << endl <<
        indent() << "}" << endl;
      
      
      indent_down();
      indent(f_service_) <<
      "});" << endl;
    }
    // Close function
    scope_down(f_service_);
    f_service_ << endl;
  }

  indent_down();
  indent(f_service_) <<
    "}" << endl;
}

/**
 * Generates a service server definition.
 *
 * @param tservice The service to generate a server for.
 */
void t_as3_generator::generate_service_server(t_service* tservice) {
  // Generate the dispatch methods
  vector<t_function*> functions = tservice->get_functions();
  vector<t_function*>::iterator f_iter;

  // Extends stuff
  string extends = "";
  string extends_processor = "";
  if (tservice->get_extends() != NULL) {
    extends = type_name(tservice->get_extends());
    extends_processor = " extends " + extends + "Processor";
  }

  // Generate the header portion
  indent(f_service_) <<
    "public class " << service_name_ << "Processor" << extends_processor << " implements TProcessor {" << endl;
  indent_up();

  indent(f_service_) <<
    "public function " << service_name_ << "Processor(iface:" << service_name_ << ")" << endl;
  scope_up(f_service_);
  if (!extends.empty()) {
    f_service_ <<
      indent() << "super(iface);" << endl;
  }
  f_service_ <<
    indent() << "iface_ = iface;" << endl;

  for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
    f_service_ <<
      indent() << "PROCESS_MAP[\"" << (*f_iter)->get_name() << "\"] = " << (*f_iter)->get_name() << "();" << endl;
  }

  scope_down(f_service_);
  f_service_ << endl;

  f_service_ <<
    indent() << "private var iface_:"  << service_name_ << ";" << endl;

  if (extends.empty()) {
    f_service_ <<
      indent() << "protected const PROCESS_MAP:Dictionary = new Dictionary();" << endl;
  }

  f_service_ << endl;

  // Generate the server implementation
  string override = "";
  if (tservice->get_extends() != NULL) {
      override = "override ";
  }
  indent(f_service_) << override << "public function process(iprot:TProtocol, oprot:TProtocol):Boolean" << endl;
  scope_up(f_service_);

  f_service_ <<
  indent() << "var msg:TMessage = iprot.readMessageBegin();" << endl;

  // TODO(mcslee): validate message, was the seqid etc. legit?
  // AS- If all method is oneway:
  // do you have an oprot?
  // do you you need nullcheck?
  f_service_ <<
    indent() << "var fn:Function = PROCESS_MAP[msg.name];" << endl <<
    indent() << "if (fn == null) {" << endl <<
    indent() << "  TProtocolUtil.skip(iprot, TType.STRUCT);" << endl <<
    indent() << "  iprot.readMessageEnd();" << endl <<
    indent() << "  var x:TApplicationError = new TApplicationError(TApplicationError.UNKNOWN_METHOD, \"Invalid method name: '\"+msg.name+\"'\");" << endl <<
    indent() << "  oprot.writeMessageBegin(new TMessage(msg.name, TMessageType.EXCEPTION, msg.seqid));" << endl <<
    indent() << "  x.write(oprot);" << endl <<
    indent() << "  oprot.writeMessageEnd();" << endl <<
    indent() << "  oprot.getTransport().flush();" << endl <<
    indent() << "  return true;" << endl <<
    indent() << "}" << endl <<
    indent() << "fn.call(this,msg.seqid, iprot, oprot);" << endl;

  f_service_ <<
    indent() << "return true;" << endl;

  scope_down(f_service_);
  f_service_ << endl;

  // Generate the process subfunctions
  for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
    generate_process_function(tservice, *f_iter);
  }

  indent_down();
  indent(f_service_) <<
    "}" << endl <<
    endl;
}

/**
 * Generates a struct and helpers for a function.
 *
 * @param tfunction The function
 */
void t_as3_generator::generate_function_helpers(t_function* tfunction) {
  if (tfunction->is_oneway()) {
    return;
  }

  t_struct result(program_, tfunction->get_name() + "_result");
  t_field success(tfunction->get_returntype(), "success", 0);
  if (!tfunction->get_returntype()->is_void()) {
    result.append(&success);
  }

  t_struct* xs = tfunction->get_xceptions();
  const vector<t_field*>& fields = xs->get_members();
  vector<t_field*>::const_iterator f_iter;
  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    result.append(*f_iter);
  }

  generate_as3_struct_definition(f_service_, &result, false, true, true);
}

/**
 * Generates a process function definition.
 *
 * @param tfunction The function to write a dispatcher for
 */
void t_as3_generator::generate_process_function(t_service* tservice,
                                                 t_function* tfunction) {
  (void) tservice;
  // Open class
  indent(f_service_) <<
  "private function " << tfunction->get_name() << "():Function {" << endl;
  indent_up();

  // Open function
  indent(f_service_) <<
    "return function(seqid:int, iprot:TProtocol, oprot:TProtocol):void"
    << endl;
  scope_up(f_service_);

  string argsname = tfunction->get_name() + "_args";
  string resultname = tfunction->get_name() + "_result";

  f_service_ <<
    indent() << "var args:"<< argsname << " = new " << argsname << "();" << endl <<
    indent() << "args.read(iprot);" << endl <<
    indent() << "iprot.readMessageEnd();" << endl;

  t_struct* xs = tfunction->get_xceptions();
  const std::vector<t_field*>& xceptions = xs->get_members();
  vector<t_field*>::const_iterator x_iter;

  // Declare result for non oneway function
  if (!tfunction->is_oneway()) {
    f_service_ <<
      indent() << "var result:" << resultname << " = new " << resultname << "();" << endl;
  }

  // Try block for a function with exceptions
  if (xceptions.size() > 0) {
    f_service_ <<
      indent() << "try {" << endl;
    indent_up();
  }

  // Generate the function call
  t_struct* arg_struct = tfunction->get_arglist();
  const std::vector<t_field*>& fields = arg_struct->get_members();
  vector<t_field*>::const_iterator f_iter;

  f_service_ << indent();
  if (tfunction->is_oneway()){
    f_service_ <<
      "iface_." << tfunction->get_name() << "(";
    bool first = true;
    for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
      if (first) {
        first = false;
      } else {
        f_service_ << ", ";
      } 
      f_service_ << "args." << (*f_iter)->get_name();
    }
    f_service_ << ");" << endl;
  } else {
    f_service_ << "// sorry this operation is not supported yet" << endl;
    f_service_ << indent() << "throw new Error(\"This is not yet supported\");" << endl;
  }

  // Set isset on success field
  if (!tfunction->is_oneway() && !tfunction->get_returntype()->is_void() && !type_can_be_null(tfunction->get_returntype())) {
    f_service_ <<
      indent() << "result.set" << get_cap_name("success") << get_cap_name("isSet") << "(true);" << endl;
  }

  if (!tfunction->is_oneway() && xceptions.size() > 0) {
    indent_down();
    f_service_ << indent() << "}";
    for (x_iter = xceptions.begin(); x_iter != xceptions.end(); ++x_iter) {
      f_service_ << " catch (" << (*x_iter)->get_name() << ":" << type_name((*x_iter)->get_type(), false, false) << ") {" << endl;
      if (!tfunction->is_oneway()) {
        indent_up();
        f_service_ <<
          indent() << "result." << (*x_iter)->get_name() << " = " << (*x_iter)->get_name() << ";" << endl;
        indent_down();
        f_service_ << indent() << "}";
      } else {
        f_service_ << "}";
      }
    }
    f_service_ << " catch (th:Error) {" << endl;
    indent_up();
    f_service_ <<
      indent() << "trace(\"Internal error processing " << tfunction->get_name() << "\", th);" << endl <<
      indent() << "var x:TApplicationError = new TApplicationError(TApplicationError.INTERNAL_ERROR, \"Internal error processing " << tfunction->get_name() << "\");" << endl <<
      indent() << "oprot.writeMessageBegin(new TMessage(\"" << tfunction->get_name() << "\", TMessageType.EXCEPTION, seqid));" << endl <<
      indent() << "x.write(oprot);" << endl <<
      indent() << "oprot.writeMessageEnd();" << endl <<
      indent() << "oprot.getTransport().flush();" << endl <<
      indent() << "return;" << endl;
    indent_down();
    f_service_ << indent() << "}" << endl;
  }

  // Shortcut out here for oneway functions
  if (tfunction->is_oneway()) {
    f_service_ <<
      indent() << "return;" << endl;
    scope_down(f_service_);

    // Close class
    indent_down();
    f_service_ <<
      indent() << "}" << endl <<
      endl;
    return;
  }

  f_service_ <<
    indent() << "oprot.writeMessageBegin(new TMessage(\"" << tfunction->get_name() << "\", TMessageType.REPLY, seqid));" << endl <<
    indent() << "result.write(oprot);" << endl <<
    indent() << "oprot.writeMessageEnd();" << endl <<
    indent() << "oprot.getTransport().flush();" << endl;

  // Close function
  scope_down(f_service_);
  f_service_ << endl;

  // Close class
  indent_down();
  f_service_ <<
    indent() << "}" << endl <<
    endl;
}

/**
 * Deserializes a field of any type.
 *
 * @param tfield The field
 * @param prefix The variable name or container for this field
 */
void t_as3_generator::generate_deserialize_field(ofstream& out,
                                                  t_field* tfield,
                                                  string prefix) {
  t_type* type = get_true_type(tfield->get_type());

  if (type->is_void()) {
    throw "CANNOT GENERATE DESERIALIZE CODE FOR void TYPE: " +
      prefix + tfield->get_name();
  }

  string name = prefix + tfield->get_name();

  if (type->is_struct() || type->is_xception()) {
    generate_deserialize_struct(out,
                                (t_struct*)type,
                                name);
  } else if (type->is_container()) {
    generate_deserialize_container(out, type, name);
  } else if (type->is_base_type() || type->is_enum()) {

    indent(out) <<
      name << " = iprot.";

    if (type->is_base_type()) {
      t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
      switch (tbase) {
      case t_base_type::TYPE_VOID:
        throw "compiler error: cannot serialize void field in a struct: " +
          name;
        break;
      case t_base_type::TYPE_STRING:
        if (((t_base_type*)type)->is_binary()) {
          out << "readBinary();";
        } else {
          out << "readString();";
        }
        break;
      case t_base_type::TYPE_BOOL:
        out << "readBool();";
        break;
      case t_base_type::TYPE_BYTE:
        out << "readByte();";
        break;
      case t_base_type::TYPE_I16:
        out << "readI16();";
        break;
      case t_base_type::TYPE_I32:
        out << "readI32();";
        break;
      case t_base_type::TYPE_I64:
        out << "readI64();";
        break;
      case t_base_type::TYPE_DOUBLE:
        out << "readDouble();";
        break;
      default:
        throw "compiler error: no As3 name for base type " + t_base_type::t_base_name(tbase);
      }
    } else if (type->is_enum()) {
      out << "readI32();";
    }
    out <<
      endl;
  } else {
    printf("DO NOT KNOW HOW TO DESERIALIZE FIELD '%s' TYPE '%s'\n",
           tfield->get_name().c_str(), type_name(type).c_str());
  }
}

/**
 * Generates an unserializer for a struct, invokes read()
 */
void t_as3_generator::generate_deserialize_struct(ofstream& out,
                                                   t_struct* tstruct,
                                                   string prefix) {
  out <<
    indent() << prefix << " = new " << type_name(tstruct) << "();" << endl <<
    indent() << prefix << ".read(iprot);" << endl;
}

/**
 * Deserializes a container by reading its size and then iterating
 */
void t_as3_generator::generate_deserialize_container(ofstream& out,
                                                      t_type* ttype,
                                                      string prefix) {
  scope_up(out);

  string obj;

  if (ttype->is_map()) {
    obj = tmp("_map");
  } else if (ttype->is_set()) {
    obj = tmp("_set");
  } else if (ttype->is_list()) {
    obj = tmp("_list");
  }

  // Declare variables, read header
  if (ttype->is_map()) {
    indent(out) << "var " << obj << ":TMap = iprot.readMapBegin();" << endl;
  } else if (ttype->is_set()) {
    indent(out) << "var " << obj << ":TSet = iprot.readSetBegin();" << endl;
  } else if (ttype->is_list()) {
    indent(out) << "var " << obj << ":TList = iprot.readListBegin();" << endl;
  }

  indent(out)
    << prefix << " = new " << type_name(ttype, false, true)
    // size the collection correctly
    << "("
    << ");" << endl;

  // For loop iterates over elements
  string i = tmp("_i");
  indent(out) <<
    "for (var " << i << ":int = 0; " <<
    i << " < " << obj << ".size" << "; " <<
    "++" << i << ")" << endl;

    scope_up(out);

    if (ttype->is_map()) {
      generate_deserialize_map_element(out, (t_map*)ttype, prefix);
    } else if (ttype->is_set()) {
      generate_deserialize_set_element(out, (t_set*)ttype, prefix);
    } else if (ttype->is_list()) {
      generate_deserialize_list_element(out, (t_list*)ttype, prefix);
    }

    scope_down(out);

  // Read container end
  if (ttype->is_map()) {
    indent(out) << "iprot.readMapEnd();" << endl;
  } else if (ttype->is_set()) {
    indent(out) << "iprot.readSetEnd();" << endl;
  } else if (ttype->is_list()) {
    indent(out) << "iprot.readListEnd();" << endl;
  }

  scope_down(out);
}


/**
 * Generates code to deserialize a map
 */
void t_as3_generator::generate_deserialize_map_element(ofstream& out,
                                                        t_map* tmap,
                                                        string prefix) {
  string key = tmp("_key");
  string val = tmp("_val");
  t_field fkey(tmap->get_key_type(), key);
  t_field fval(tmap->get_val_type(), val);

  indent(out) <<
    declare_field(&fkey) << endl;
  indent(out) <<
    declare_field(&fval) << endl;

  generate_deserialize_field(out, &fkey);
  generate_deserialize_field(out, &fval);

  indent(out) <<
    prefix << "[" << key << "] = " << val << ";" << endl;
}

/**
 * Deserializes a set element
 */
void t_as3_generator::generate_deserialize_set_element(ofstream& out,
                                                        t_set* tset,
                                                        string prefix) {
  string elem = tmp("_elem");
  t_field felem(tset->get_elem_type(), elem);

  indent(out) <<
    declare_field(&felem) << endl;

  generate_deserialize_field(out, &felem);

  indent(out) <<
    prefix << ".add(" << elem << ");" << endl;
}

/**
 * Deserializes a list element
 */
void t_as3_generator::generate_deserialize_list_element(ofstream& out,
                                                         t_list* tlist,
                                                         string prefix) {
  string elem = tmp("_elem");
  t_field felem(tlist->get_elem_type(), elem);

  indent(out) <<
    declare_field(&felem) << endl;

  generate_deserialize_field(out, &felem);

  indent(out) <<
    prefix << ".push(" << elem << ");" << endl;
}


/**
 * Serializes a field of any type.
 *
 * @param tfield The field to serialize
 * @param prefix Name to prepend to field name
 */
void t_as3_generator::generate_serialize_field(ofstream& out,
                                                t_field* tfield,
                                                string prefix) {
  t_type* type = get_true_type(tfield->get_type());

  // Do nothing for void types
  if (type->is_void()) {
    throw "CANNOT GENERATE SERIALIZE CODE FOR void TYPE: " +
      prefix + tfield->get_name();
  }

  if (type->is_struct() || type->is_xception()) {
    generate_serialize_struct(out,
                              (t_struct*)type,
                              prefix + tfield->get_name());
  } else if (type->is_container()) {
    generate_serialize_container(out,
                                 type,
                                 prefix + tfield->get_name());
  } else if (type->is_base_type() || type->is_enum()) {

    string name = prefix + tfield->get_name();
    indent(out) <<
      "oprot.";

    if (type->is_base_type()) {
      t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
      switch (tbase) {
      case t_base_type::TYPE_VOID:
        throw
          "compiler error: cannot serialize void field in a struct: " + name;
        break;
      case t_base_type::TYPE_STRING:
        if (((t_base_type*)type)->is_binary()) {
          out << "writeBinary(" << name << ");";
        } else {
          out << "writeString(" << name << ");";
        }
        break;
      case t_base_type::TYPE_BOOL:
        out << "writeBool(" << name << ");";
        break;
      case t_base_type::TYPE_BYTE:
        out << "writeByte(" << name << ");";
        break;
      case t_base_type::TYPE_I16:
        out << "writeI16(" << name << ");";
        break;
      case t_base_type::TYPE_I32:
        out << "writeI32(" << name << ");";
        break;
      case t_base_type::TYPE_I64:
        out << "writeI64(" << name << ");";
        break;
      case t_base_type::TYPE_DOUBLE:
        out << "writeDouble(" << name << ");";
        break;
      default:
        throw "compiler error: no As3 name for base type " + t_base_type::t_base_name(tbase);
      }
    } else if (type->is_enum()) {
      out << "writeI32(" << name << ");";
    }
    out << endl;
  } else {
    printf("DO NOT KNOW HOW TO SERIALIZE FIELD '%s%s' TYPE '%s'\n",
           prefix.c_str(),
           tfield->get_name().c_str(),
           type_name(type).c_str());
  }
}

/**
 * Serializes all the members of a struct.
 *
 * @param tstruct The struct to serialize
 * @param prefix  String prefix to attach to all fields
 */
void t_as3_generator::generate_serialize_struct(ofstream& out,
                                                 t_struct* tstruct,
                                                 string prefix) {
  (void) tstruct;
  out <<
    indent() << prefix << ".write(oprot);" << endl;
}

/**
 * Serializes a container by writing its size then the elements.
 *
 * @param ttype  The type of container
 * @param prefix String prefix for fields
 */
void t_as3_generator::generate_serialize_container(ofstream& out,
                                                    t_type* ttype,
                                                    string prefix) {
  scope_up(out);

  if (ttype->is_map()) {
    string iter = tmp("_key");
    string counter = tmp("_sizeCounter");
    indent(out) << "var " << counter << ":int = 0;" << endl;
    indent(out) << "for (var " << iter << ":* in " << prefix << ") {" << endl;
    indent(out) << "  " << counter << +"++;" << endl;
    indent(out) << "}" << endl;
    
    indent(out) <<
      "oprot.writeMapBegin(new TMap(" <<
      type_to_enum(((t_map*)ttype)->get_key_type()) << ", " <<
      type_to_enum(((t_map*)ttype)->get_val_type()) << ", " <<
      counter << "));" << endl;
  } else if (ttype->is_set()) {
    indent(out) <<
      "oprot.writeSetBegin(new TSet(" <<
      type_to_enum(((t_set*)ttype)->get_elem_type()) << ", " <<
      prefix << ".size));" << endl;
  } else if (ttype->is_list()) {
    indent(out) <<
      "oprot.writeListBegin(new TList(" <<
      type_to_enum(((t_list*)ttype)->get_elem_type()) << ", " <<
      prefix << ".length));" << endl;
  }

  string iter = tmp("elem");
  if (ttype->is_map()) {
    indent(out) <<
      "for (var " << iter << ":* in " << prefix << ")";
  } else if (ttype->is_set()) {
    indent(out) <<
      "for each (var " << iter << ":* in " << prefix << ".toArray())";
  } else if (ttype->is_list()) {
    indent(out) <<
      "for each (var " << iter << ":* in " << prefix << ")";
  }

    scope_up(out);

    if (ttype->is_map()) {
      generate_serialize_map_element(out, (t_map*)ttype, iter, prefix);
    } else if (ttype->is_set()) {
      generate_serialize_set_element(out, (t_set*)ttype, iter);
    } else if (ttype->is_list()) {
      generate_serialize_list_element(out, (t_list*)ttype, iter);
    }

    scope_down(out);

  if (ttype->is_map()) {
    indent(out) <<
      "oprot.writeMapEnd();" << endl;
  } else if (ttype->is_set()) {
    indent(out) <<
      "oprot.writeSetEnd();" << endl;
  } else if (ttype->is_list()) {
    indent(out) <<
      "oprot.writeListEnd();" << endl;
  }

  scope_down(out);
}

/**
 * Serializes the members of a map.
 */
void t_as3_generator::generate_serialize_map_element(ofstream& out,
                                                      t_map* tmap,
                                                      string iter,
                                                      string map) {
  t_field kfield(tmap->get_key_type(), iter);
  generate_serialize_field(out, &kfield, "");
  t_field vfield(tmap->get_val_type(), map + "[" + iter + "]");
  generate_serialize_field(out, &vfield, "");
}

/**
 * Serializes the members of a set.
 */
void t_as3_generator::generate_serialize_set_element(ofstream& out,
                                                      t_set* tset,
                                                      string iter) {
  t_field efield(tset->get_elem_type(), iter);
  generate_serialize_field(out, &efield, "");
}

/**
 * Serializes the members of a list.
 */
void t_as3_generator::generate_serialize_list_element(ofstream& out,
                                                       t_list* tlist,
                                                       string iter) {
  t_field efield(tlist->get_elem_type(), iter);
  generate_serialize_field(out, &efield, "");
}

/**
 * Returns a As3 type name
 *
 * @param ttype The type
 * @param container Is the type going inside a container?
 * @return As3 type name, i.e. HashMap<Key,Value>
 */
string t_as3_generator::type_name(t_type* ttype, bool in_container, bool in_init) {
  (void) in_init;
  // In As3 typedefs are just resolved to their real type
  ttype = get_true_type(ttype);
  string prefix;

  if (ttype->is_base_type()) {
    return base_type_name((t_base_type*)ttype, in_container);
  } else if (ttype->is_enum()) {
    return "int";
  } else if (ttype->is_map()) {
    return "Dictionary";
  } else if (ttype->is_set()) {
    return "Set";
  } else if (ttype->is_list()) {
    return "Array";
  }

  // Check for namespacing
  t_program* program = ttype->get_program();
  if (program != NULL && program != program_) {
    string package = program->get_namespace("as3");
    if (!package.empty()) {
      return package + "." + ttype->get_name();
    }
  }

  return ttype->get_name();
}

/**
 * Returns the AS3 type that corresponds to the thrift type.
 *
 * @param tbase The base type
 * @param container Is it going in a As3 container?
 */
string t_as3_generator::base_type_name(t_base_type* type,
                                        bool in_container) {
  (void) in_container;
  t_base_type::t_base tbase = type->get_base();

  switch (tbase) {
  case t_base_type::TYPE_VOID:
    return "void";
  case t_base_type::TYPE_STRING:
    if (type->is_binary()) {
      return "ByteArray";
    } else {
      return "String";
    }
  case t_base_type::TYPE_BOOL:
    return "Boolean";
  case t_base_type::TYPE_BYTE:
  case t_base_type::TYPE_I16:
  case t_base_type::TYPE_I32:
    return "int";
  case t_base_type::TYPE_I64:
    throw "i64 is not yet supported in as3";
  case t_base_type::TYPE_DOUBLE:
    return "Number";
  default:
    throw "compiler error: no C++ name for base type " + t_base_type::t_base_name(tbase);
  }
}

/**
 * Declares a field, which may include initialization as necessary.
 *
 * @param ttype The type
 */
string t_as3_generator::declare_field(t_field* tfield, bool init) {
  // TODO(mcslee): do we ever need to initialize the field?
  string result = "var " + tfield->get_name() + ":" + type_name(tfield->get_type());
  if (init) {
    t_type* ttype = get_true_type(tfield->get_type());
    if (ttype->is_base_type() && tfield->get_value() != NULL) {
      ofstream dummy;
      result += " = " + render_const_value(dummy, tfield->get_name(), ttype, tfield->get_value());
    } else if (ttype->is_base_type()) {
      t_base_type::t_base tbase = ((t_base_type*)ttype)->get_base();
      switch (tbase) {
      case t_base_type::TYPE_VOID:
        throw "NO T_VOID CONSTRUCT";
      case t_base_type::TYPE_STRING:
        result += " = null";
        break;
      case t_base_type::TYPE_BOOL:
        result += " = false";
        break;
      case t_base_type::TYPE_BYTE:
      case t_base_type::TYPE_I16:
      case t_base_type::TYPE_I32:
      case t_base_type::TYPE_I64:
        result += " = 0";
        break;
      case t_base_type::TYPE_DOUBLE:
        result += " = (double)0";
        break;
    }

    } else if (ttype->is_enum()) {
      result += " = 0";
    } else if (ttype->is_container()) {
      result += " = new " + type_name(ttype, false, true) + "()";
    } else {
      result += " = new " + type_name(ttype, false, true) + "()";;
    }
  }
  return result + ";";
}

/**
 * Renders a function signature of the form 'type name(args)'
 *
 * @param tfunction Function definition
 * @return String of rendered function definition
 */
string t_as3_generator::function_signature(t_function* tfunction,
                                            string prefix) {
  std::string arguments = argument_list(tfunction->get_arglist());
  if (! tfunction->is_oneway()) {
    if (arguments != "") {
      arguments += ", ";
    }
    arguments += "onError:Function, onSuccess:Function";
  }

  std::string result = "function " + 
    prefix + tfunction->get_name() + "(" + arguments + "):void";
  return result;
}

/**
 * Renders a comma separated field list, with type names
 */
string t_as3_generator::argument_list(t_struct* tstruct) {
  string result = "";

  const vector<t_field*>& fields = tstruct->get_members();
  vector<t_field*>::const_iterator f_iter;
  bool first = true;
  for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
    if (first) {
      first = false;
    } else {
      result += ", ";
    }
    result += (*f_iter)->get_name() + ":" + type_name((*f_iter)->get_type());
  }
  return result;
}

/**
 * Converts the parse type to a C++ enum string for the given type.
 */
string t_as3_generator::type_to_enum(t_type* type) {
  type = get_true_type(type);

  if (type->is_base_type()) {
    t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
    switch (tbase) {
    case t_base_type::TYPE_VOID:
      throw "NO T_VOID CONSTRUCT";
    case t_base_type::TYPE_STRING:
      return "TType.STRING";
    case t_base_type::TYPE_BOOL:
      return "TType.BOOL";
    case t_base_type::TYPE_BYTE:
      return "TType.BYTE";
    case t_base_type::TYPE_I16:
      return "TType.I16";
    case t_base_type::TYPE_I32:
      return "TType.I32";
    case t_base_type::TYPE_I64:
      return "TType.I64";
    case t_base_type::TYPE_DOUBLE:
      return "TType.DOUBLE";
    }
  } else if (type->is_enum()) {
    return "TType.I32";
  } else if (type->is_struct() || type->is_xception()) {
    return "TType.STRUCT";
  } else if (type->is_map()) {
    return "TType.MAP";
  } else if (type->is_set()) {
    return "TType.SET";
  } else if (type->is_list()) {
    return "TType.LIST";
  }

  throw "INVALID TYPE IN type_to_enum: " + type->get_name();
}

/**
 * Applies the correct style to a string based on the value of nocamel_style_
 */
std::string t_as3_generator::get_cap_name(std::string name){
  name[0] = toupper(name[0]);
  return name;
}

string t_as3_generator::constant_name(string name) {
  string constant_name;

  bool is_first = true;
  bool was_previous_char_upper = false;
  for (string::iterator iter = name.begin(); iter != name.end(); ++iter) {
    string::value_type character = (*iter);

    bool is_upper = isupper(character);

    if (is_upper && !is_first && !was_previous_char_upper) {
      constant_name += '_';
    }
    constant_name += toupper(character);

    is_first = false;
    was_previous_char_upper = is_upper;
  }

  return constant_name;
}

/**
 * Emits a As3Doc comment if the provided object has a doc in Thrift
 */
void t_as3_generator::generate_as3_doc(ofstream &out,
                                         t_doc* tdoc) {
  if (tdoc->has_doc()) {
    generate_docstring_comment(out,
      "/**\n",
      " * ", tdoc->get_doc(),
      " */\n");
  }
}

/**
 * Emits a As3Doc comment if the provided function object has a doc in Thrift
 */
void t_as3_generator::generate_as3_doc(ofstream &out,
                                         t_function* tfunction) {
  if (tfunction->has_doc()) {
    stringstream ss;
    ss << tfunction->get_doc();
    const vector<t_field*>& fields = tfunction->get_arglist()->get_members();
    vector<t_field*>::const_iterator p_iter;
    for (p_iter = fields.begin(); p_iter != fields.end(); ++p_iter) {
      t_field* p = *p_iter;
      ss << "\n@param " << p->get_name();
      if (p->has_doc()) {
        ss << " " << p->get_doc();
      }
    }
    generate_docstring_comment(out,
      "/**\n",
      " * ", ss.str(),
      " */\n");
  }
}

std::string t_as3_generator::generate_isset_check(t_field* field) {
  return generate_isset_check(field->get_name());
}

std::string t_as3_generator::generate_isset_check(std::string field_name) {
  return "is" + get_cap_name("set") + get_cap_name(field_name) + "()";
}

void t_as3_generator::generate_isset_set(ofstream& out, t_field* field) {
  if (!type_can_be_null(field->get_type())) {
    indent(out) << "this.__isset_" << field->get_name() << " = true;" << endl;
  }
}

std::string t_as3_generator::get_enum_class_name(t_type* type) {
  string package = "";
  t_program* program = type->get_program();
  if (program != NULL && program != program_) {
    package = program->get_namespace("as3") + ".";
  }
  return package + type->get_name();
}

THRIFT_REGISTER_GENERATOR(as3, "AS3",
"    bindable:          Add [bindable] metadata to all the struct classes.\n"
)