lib/go/thrift/json_protocol.go - common/thrift - Gitiles

 /*
  * 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.
  */

 package thrift

 import (
 	"encoding/base64"
 	"fmt"
 )

 const (
 	THRIFT_JSON_PROTOCOL_VERSION = 1
 )

 // for references to _ParseContext see tsimplejson_protocol.go

 // JSON protocol implementation for thrift.
 //
 // This protocol produces/consumes a simple output format
 // suitable for parsing by scripting languages.  It should not be
 // confused with the full-featured TJSONProtocol.
 //
 type TJSONProtocol struct {
 	*TSimpleJSONProtocol
 }

 // Constructor
 func NewTJSONProtocol(t TTransport) *TJSONProtocol {
 	v := &TJSONProtocol{TSimpleJSONProtocol: NewTSimpleJSONProtocol(t)}
 	v.parseContextStack = append(v.parseContextStack, int(_CONTEXT_IN_TOPLEVEL))
 	v.dumpContext = append(v.dumpContext, int(_CONTEXT_IN_TOPLEVEL))
 	return v
 }

 // Factory
 type TJSONProtocolFactory struct{}

 func (p *TJSONProtocolFactory) GetProtocol(trans TTransport) TProtocol {
 	return NewTJSONProtocol(trans)
 }

 func NewTJSONProtocolFactory() *TJSONProtocolFactory {
 	return &TJSONProtocolFactory{}
 }

 func (p *TJSONProtocol) WriteMessageBegin(name string, typeId TMessageType, seqId int32) error {
 	if e := p.OutputListBegin(); e != nil {
 		return e
 	}
 	if e := p.WriteI32(THRIFT_JSON_PROTOCOL_VERSION); e != nil {
 		return e
 	}
 	if e := p.WriteString(name); e != nil {
 		return e
 	}
 	if e := p.WriteByte(byte(typeId)); e != nil {
 		return e
 	}
 	if e := p.WriteI32(seqId); e != nil {
 		return e
 	}
 	return nil
 }

 func (p *TJSONProtocol) WriteMessageEnd() error {
 	return p.OutputListEnd()
 }

 func (p *TJSONProtocol) WriteStructBegin(name string) error {
 	if e := p.OutputObjectBegin(); e != nil {
 		return e
 	}
 	return nil
 }

 func (p *TJSONProtocol) WriteStructEnd() error {
 	return p.OutputObjectEnd()
 }

 func (p *TJSONProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
 	if e := p.WriteI16(id); e != nil {
 		return e
 	}
 	if e := p.OutputObjectBegin(); e != nil {
 		return e
 	}
 	if e := p.WriteString(p.TypeIdToString(typeId)); e != nil {
 		return e
 	}
 	return nil
 }

 func (p *TJSONProtocol) WriteFieldEnd() error {
 	return p.OutputObjectEnd()
 }

 func (p *TJSONProtocol) WriteFieldStop() error { return nil }

 func (p *TJSONProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
 	if e := p.OutputListBegin(); e != nil {
 		return e
 	}
 	if e := p.WriteString(p.TypeIdToString(keyType)); e != nil {
 		return e
 	}
 	if e := p.WriteString(p.TypeIdToString(valueType)); e != nil {
 		return e
 	}
 	return p.WriteI64(int64(size))
 }

 func (p *TJSONProtocol) WriteMapEnd() error {
 	return p.OutputListEnd()
 }

 func (p *TJSONProtocol) WriteListBegin(elemType TType, size int) error {
 	return p.OutputElemListBegin(elemType, size)
 }

 func (p *TJSONProtocol) WriteListEnd() error {
 	return p.OutputListEnd()
 }

 func (p *TJSONProtocol) WriteSetBegin(elemType TType, size int) error {
 	return p.OutputElemListBegin(elemType, size)
 }

 func (p *TJSONProtocol) WriteSetEnd() error {
 	return p.OutputListEnd()
 }

 func (p *TJSONProtocol) WriteBool(b bool) error {
 	return p.OutputBool(b)
 }

 func (p *TJSONProtocol) WriteByte(b byte) error {
 	return p.WriteI32(int32(b))
 }

 func (p *TJSONProtocol) WriteI16(v int16) error {
 	return p.WriteI32(int32(v))
 }

 func (p *TJSONProtocol) WriteI32(v int32) error {
 	return p.OutputI64(int64(v))
 }

 func (p *TJSONProtocol) WriteI64(v int64) error {
 	return p.OutputI64(int64(v))
 }

 func (p *TJSONProtocol) WriteDouble(v float64) error {
 	return p.OutputF64(v)
 }

 func (p *TJSONProtocol) WriteString(v string) error {
 	return p.OutputString(v)
 }

 func (p *TJSONProtocol) WriteBinary(v []byte) error {
 	// JSON library only takes in a string,
 	// not an arbitrary byte array, to ensure bytes are transmitted
 	// efficiently we must convert this into a valid JSON string
 	// therefore we use base64 encoding to avoid excessive escaping/quoting
 	if e := p.OutputPreValue(); e != nil {
 		return e
 	}
 	p.writer.Write(JSON_QUOTE_BYTES)
 	writer := base64.NewEncoder(base64.StdEncoding, p.writer)
 	if _, e := writer.Write(v); e != nil {
 		return NewTProtocolException(e)
 	}
 	writer.Close()
 	p.writer.Write(JSON_QUOTE_BYTES)
 	return p.OutputPostValue()
 }

 // Reading methods.

 func (p *TJSONProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
 	if isNull, err := p.ParseListBegin(); isNull || err != nil {
 		return name, typeId, seqId, err
 	}
 	version, err := p.ReadI32()
 	if err != nil {
 		return name, typeId, seqId, err
 	}
 	if version != THRIFT_JSON_PROTOCOL_VERSION {
 		e := fmt.Errorf("Unknown Protocol version %d, expected version %d", version, THRIFT_JSON_PROTOCOL_VERSION)
 		return name, typeId, seqId, NewTProtocolExceptionWithType(INVALID_DATA, e)

 	}
 	if name, err = p.ReadString(); err != nil {
 		return name, typeId, seqId, err
 	}
 	bTypeId, err := p.ReadByte()
 	typeId = TMessageType(bTypeId)
 	if err != nil {
 		return name, typeId, seqId, err
 	}
 	if seqId, err = p.ReadI32(); err != nil {
 		return name, typeId, seqId, err
 	}
 	return name, typeId, seqId, nil
 }

 func (p *TJSONProtocol) ReadMessageEnd() error {
 	err := p.ParseListEnd()
 	return err
 }

 func (p *TJSONProtocol) ReadStructBegin() (name string, err error) {
 	_, err = p.ParseObjectStart()
 	return "", err
 }

 func (p *TJSONProtocol) ReadStructEnd() error {
 	return p.ParseObjectEnd()
 }

 func (p *TJSONProtocol) ReadFieldBegin() (string, TType, int16, error) {
 	if p.reader.Buffered() < 1 {
 		return "", STOP, -1, nil
 	}
 	b, _ := p.reader.Peek(1)
 	if len(b) < 1 || b[0] == JSON_RBRACE[0] || b[0] == JSON_RBRACKET[0] {
 		return "", STOP, -1, nil
 	}
 	fieldId, err := p.ReadI16()
 	if err != nil {
 		return "", STOP, fieldId, err
 	}
 	if _, err = p.ParseObjectStart(); err != nil {
 		return "", STOP, fieldId, err
 	}
 	sType, err := p.ReadString()
 	fType := p.StringToTypeId(sType)
 	return "", fType, fieldId, err
 }

 func (p *TJSONProtocol) ReadFieldEnd() error {
 	return p.ParseObjectEnd()
 }

 func (p *TJSONProtocol) ReadMapBegin() (keyType TType, valueType TType, size int, e error) {
 	if isNull, e := p.ParseListBegin(); isNull || e != nil {
 		return VOID, VOID, 0, e
 	}

 	// read keyType
 	sKeyType, e := p.ReadString()
 	keyType = p.StringToTypeId(sKeyType)
 	if e != nil {
 		return keyType, valueType, size, e
 	}

 	// read valueType
 	sValueType, e := p.ReadString()
 	valueType = p.StringToTypeId(sValueType)
 	if e != nil {
 		return keyType, valueType, size, e
 	}

 	// read size
 	iSize, err := p.ReadI64()
 	size = int(iSize)
 	return keyType, valueType, size, err
 }

 func (p *TJSONProtocol) ReadMapEnd() error {
 	return p.ParseListEnd()
 }

 func (p *TJSONProtocol) ReadListBegin() (elemType TType, size int, e error) {
 	return p.ParseElemListBegin()
 }

 func (p *TJSONProtocol) ReadListEnd() error {
 	return p.ParseListEnd()
 }

 func (p *TJSONProtocol) ReadSetBegin() (elemType TType, size int, e error) {
 	return p.ParseElemListBegin()
 }

 func (p *TJSONProtocol) ReadSetEnd() error {
 	return p.ParseListEnd()
 }

 func (p *TJSONProtocol) ReadBool() (bool, error) {
 	var value bool
 	if err := p.ParsePreValue(); err != nil {
 		return value, err
 	}
 	b, _ := p.reader.Peek(len(JSON_FALSE))
 	if len(b) > 0 {
 		switch b[0] {
 		case JSON_TRUE[0]:
 			if string(b[0:len(JSON_TRUE)]) == string(JSON_TRUE) {
 				p.reader.Read(b[0:len(JSON_TRUE)])
 				value = true
 			} else {
 				e := fmt.Errorf("Expected \"true\" but found: %s", string(b))
 				return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
 			}
 			break
 		case JSON_FALSE[0]:
 			if string(b[0:len(JSON_FALSE)]) == string(JSON_FALSE) {
 				p.reader.Read(b[0:len(JSON_FALSE)])
 				value = false
 			} else {
 				e := fmt.Errorf("Expected \"false\" but found: %s", string(b))
 				return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
 			}
 			break
 		case JSON_NULL[0]:
 			if string(b[0:len(JSON_NULL)]) == string(JSON_NULL) {
 				p.reader.Read(b[0:len(JSON_NULL)])
 				value = false
 			} else {
 				e := fmt.Errorf("Expected \"null\" but found: %s", string(b))
 				return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
 			}
 		default:
 			e := fmt.Errorf("Expected \"true\", \"false\", or \"null\" but found: %s", string(b))
 			return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
 		}
 	}
 	return value, p.ParsePostValue()
 }

 func (p *TJSONProtocol) ReadByte() (byte, error) {
 	v, err := p.ReadI64()
 	return byte(v), err
 }

 func (p *TJSONProtocol) ReadI16() (int16, error) {
 	v, err := p.ReadI64()
 	return int16(v), err
 }

 func (p *TJSONProtocol) ReadI32() (int32, error) {
 	v, err := p.ReadI64()
 	return int32(v), err
 }

 func (p *TJSONProtocol) ReadI64() (int64, error) {
 	v, _, err := p.ParseI64()
 	return v, err
 }

 func (p *TJSONProtocol) ReadDouble() (float64, error) {
 	v, _, err := p.ParseF64()
 	return v, err
 }

 func (p *TJSONProtocol) ReadString() (string, error) {
 	var v string
 	if err := p.ParsePreValue(); err != nil {
 		return v, err
 	}
 	b, _ := p.reader.Peek(len(JSON_NULL))
 	if len(b) > 0 && b[0] == JSON_QUOTE {
 		p.reader.ReadByte()
 		value, err := p.ParseStringBody()
 		v = value
 		if err != nil {
 			return v, err
 		}
 	} else if len(b) >= len(JSON_NULL) && string(b[0:len(JSON_NULL)]) == string(JSON_NULL) {
 		_, err := p.reader.Read(b[0:len(JSON_NULL)])
 		if err != nil {
 			return v, NewTProtocolException(err)
 		}
 	} else {
 		e := fmt.Errorf("Expected a JSON string, found %s", string(b))
 		return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
 	}
 	return v, p.ParsePostValue()
 }

 func (p *TJSONProtocol) ReadBinary() ([]byte, error) {
 	var v []byte
 	if err := p.ParsePreValue(); err != nil {
 		return nil, err
 	}
 	b, _ := p.reader.Peek(len(JSON_NULL))
 	if len(b) > 0 && b[0] == JSON_QUOTE {
 		p.reader.ReadByte()
 		value, err := p.ParseBase64EncodedBody()
 		v = value
 		if err != nil {
 			return v, err
 		}
 	} else if len(b) >= len(JSON_NULL) && string(b[0:len(JSON_NULL)]) == string(JSON_NULL) {
 		_, err := p.reader.Read(b[0:len(JSON_NULL)])
 		if err != nil {
 			return v, NewTProtocolException(err)
 		}
 	} else {
 		e := fmt.Errorf("Expected a JSON string, found %s", string(b))
 		return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
 	}
 	return v, p.ParsePostValue()
 }

 func (p *TJSONProtocol) Flush() (err error) {
 	return NewTProtocolException(p.writer.Flush())
 }

 func (p *TJSONProtocol) Skip(fieldType TType) (err error) {
 	return SkipDefaultDepth(p, fieldType)
 }

 func (p *TJSONProtocol) Transport() TTransport {
 	return p.trans
 }

 func (p *TJSONProtocol) OutputElemListBegin(elemType TType, size int) error {
 	if e := p.OutputListBegin(); e != nil {
 		return e
 	}
 	if e := p.WriteString(p.TypeIdToString(elemType)); e != nil {
 		return e
 	}
 	if e := p.WriteI64(int64(size)); e != nil {
 		return e
 	}
 	return nil
 }


 func (p *TJSONProtocol) ParseElemListBegin() (elemType TType, size int, e error) {
 	if isNull, e := p.ParseListBegin(); isNull || e != nil {
 		return VOID, 0, e
 	}
 	sElemType, err := p.ReadString()
 	elemType = p.StringToTypeId(sElemType)
 	if err != nil {
 		return elemType, size, err
 	}
 	nSize, err2 := p.ReadI64()
 	size = int(nSize)
 	return elemType, size, err2
 }

 func (p *TJSONProtocol) readElemListBegin() (elemType TType, size int, e error) {
 	if isNull, e := p.ParseListBegin(); isNull || e != nil {
 		return VOID, 0, e
 	}
 	sElemType, err := p.ReadString()
 	elemType = p.StringToTypeId(sElemType)
 	if err != nil {
 		return elemType, size, err
 	}
 	nSize, err2 := p.ReadI64()
 	size = int(nSize)
 	return elemType, size, err2
 }

 func (p *TJSONProtocol) writeElemListBegin(elemType TType, size int) error {
 	if e := p.OutputListBegin(); e != nil {
 		return e
 	}
 	if e := p.OutputString(p.TypeIdToString(elemType)); e != nil {
 		return e
 	}
 	if e := p.OutputI64(int64(size)); e != nil {
 		return e
 	}
 	return nil
 }

 func (p *TJSONProtocol) TypeIdToString(fieldType TType) string {
 	switch byte(fieldType) {
 	case STOP:
 		return "stp"
 	case VOID:
 		return "v"
 	case BOOL:
 		return "tf"
 	case BYTE:
 		return "i8"
 	case DOUBLE:
 		return "dbl"
 	case I16:
 		return "i16"
 	case I32:
 		return "i32"
 	case I64:
 		return "i64"
 	case STRING:
 		return "str"
 	case STRUCT:
 		return "rec"
 	case MAP:
 		return "map"
 	case SET:
 		return "set"
 	case LIST:
 		return "lst"
 	case UTF16:
 		return "str"
 	}
 	return ""
 }

 func (p *TJSONProtocol) StringToTypeId(fieldType string) TType {
 	switch fieldType {
 	case "stp":
 		return TType(STOP)
 	case "v":
 		return TType(VOID)
 	case "tf":
 		return TType(BOOL)
 	case "i8":
 		return TType(BYTE)
 	case "dbl":
 		return TType(DOUBLE)
 	case "16":
 		return TType(I16)
 	case "i32":
 		return TType(I32)
 	case "i64":
 		return TType(I64)
 	case "str":
 		return TType(STRING)
 	case "rec":
 		return TType(STRUCT)
 	case "map":
 		return TType(MAP)
 	case "set":
 		return TType(SET)
 	case "lst":
 		return TType(LIST)
 	case "u16":
 		return TType(UTF16)
 	}
 	return TType(STOP)
 }
	/*
	* 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.
	*/

	package thrift

	import (
	"encoding/base64"
	"fmt"
	)

	const (
	THRIFT_JSON_PROTOCOL_VERSION = 1
	)

	// for references to _ParseContext see tsimplejson_protocol.go

	// JSON protocol implementation for thrift.
	//
	// This protocol produces/consumes a simple output format
	// suitable for parsing by scripting languages. It should not be
	// confused with the full-featured TJSONProtocol.
	//
	type TJSONProtocol struct {
	*TSimpleJSONProtocol
	}

	// Constructor
	func NewTJSONProtocol(t TTransport) *TJSONProtocol {
	v := &TJSONProtocol{TSimpleJSONProtocol: NewTSimpleJSONProtocol(t)}
	v.parseContextStack = append(v.parseContextStack, int(_CONTEXT_IN_TOPLEVEL))
	v.dumpContext = append(v.dumpContext, int(_CONTEXT_IN_TOPLEVEL))
	return v
	}

	// Factory
	type TJSONProtocolFactory struct{}

	func (p *TJSONProtocolFactory) GetProtocol(trans TTransport) TProtocol {
	return NewTJSONProtocol(trans)
	}

	func NewTJSONProtocolFactory() *TJSONProtocolFactory {
	return &TJSONProtocolFactory{}
	}

	func (p *TJSONProtocol) WriteMessageBegin(name string, typeId TMessageType, seqId int32) error {
	if e := p.OutputListBegin(); e != nil {
	return e
	}
	if e := p.WriteI32(THRIFT_JSON_PROTOCOL_VERSION); e != nil {
	return e
	}
	if e := p.WriteString(name); e != nil {
	return e
	}
	if e := p.WriteByte(byte(typeId)); e != nil {
	return e
	}
	if e := p.WriteI32(seqId); e != nil {
	return e
	}
	return nil
	}

	func (p *TJSONProtocol) WriteMessageEnd() error {
	return p.OutputListEnd()
	}

	func (p *TJSONProtocol) WriteStructBegin(name string) error {
	if e := p.OutputObjectBegin(); e != nil {
	return e
	}
	return nil
	}

	func (p *TJSONProtocol) WriteStructEnd() error {
	return p.OutputObjectEnd()
	}

	func (p *TJSONProtocol) WriteFieldBegin(name string, typeId TType, id int16) error {
	if e := p.WriteI16(id); e != nil {
	return e
	}
	if e := p.OutputObjectBegin(); e != nil {
	return e
	}
	if e := p.WriteString(p.TypeIdToString(typeId)); e != nil {
	return e
	}
	return nil
	}

	func (p *TJSONProtocol) WriteFieldEnd() error {
	return p.OutputObjectEnd()
	}

	func (p *TJSONProtocol) WriteFieldStop() error { return nil }

	func (p *TJSONProtocol) WriteMapBegin(keyType TType, valueType TType, size int) error {
	if e := p.OutputListBegin(); e != nil {
	return e
	}
	if e := p.WriteString(p.TypeIdToString(keyType)); e != nil {
	return e
	}
	if e := p.WriteString(p.TypeIdToString(valueType)); e != nil {
	return e
	}
	return p.WriteI64(int64(size))
	}

	func (p *TJSONProtocol) WriteMapEnd() error {
	return p.OutputListEnd()
	}

	func (p *TJSONProtocol) WriteListBegin(elemType TType, size int) error {
	return p.OutputElemListBegin(elemType, size)
	}

	func (p *TJSONProtocol) WriteListEnd() error {
	return p.OutputListEnd()
	}

	func (p *TJSONProtocol) WriteSetBegin(elemType TType, size int) error {
	return p.OutputElemListBegin(elemType, size)
	}

	func (p *TJSONProtocol) WriteSetEnd() error {
	return p.OutputListEnd()
	}

	func (p *TJSONProtocol) WriteBool(b bool) error {
	return p.OutputBool(b)
	}

	func (p *TJSONProtocol) WriteByte(b byte) error {
	return p.WriteI32(int32(b))
	}

	func (p *TJSONProtocol) WriteI16(v int16) error {
	return p.WriteI32(int32(v))
	}

	func (p *TJSONProtocol) WriteI32(v int32) error {
	return p.OutputI64(int64(v))
	}

	func (p *TJSONProtocol) WriteI64(v int64) error {
	return p.OutputI64(int64(v))
	}

	func (p *TJSONProtocol) WriteDouble(v float64) error {
	return p.OutputF64(v)
	}

	func (p *TJSONProtocol) WriteString(v string) error {
	return p.OutputString(v)
	}

	func (p *TJSONProtocol) WriteBinary(v []byte) error {
	// JSON library only takes in a string,
	// not an arbitrary byte array, to ensure bytes are transmitted
	// efficiently we must convert this into a valid JSON string
	// therefore we use base64 encoding to avoid excessive escaping/quoting
	if e := p.OutputPreValue(); e != nil {
	return e
	}
	p.writer.Write(JSON_QUOTE_BYTES)
	writer := base64.NewEncoder(base64.StdEncoding, p.writer)
	if _, e := writer.Write(v); e != nil {
	return NewTProtocolException(e)
	}
	writer.Close()
	p.writer.Write(JSON_QUOTE_BYTES)
	return p.OutputPostValue()
	}

	// Reading methods.

	func (p *TJSONProtocol) ReadMessageBegin() (name string, typeId TMessageType, seqId int32, err error) {
	if isNull, err := p.ParseListBegin(); isNull \|\| err != nil {
	return name, typeId, seqId, err
	}
	version, err := p.ReadI32()
	if err != nil {
	return name, typeId, seqId, err
	}
	if version != THRIFT_JSON_PROTOCOL_VERSION {
	e := fmt.Errorf("Unknown Protocol version %d, expected version %d", version, THRIFT_JSON_PROTOCOL_VERSION)
	return name, typeId, seqId, NewTProtocolExceptionWithType(INVALID_DATA, e)

	}
	if name, err = p.ReadString(); err != nil {
	return name, typeId, seqId, err
	}
	bTypeId, err := p.ReadByte()
	typeId = TMessageType(bTypeId)
	if err != nil {
	return name, typeId, seqId, err
	}
	if seqId, err = p.ReadI32(); err != nil {
	return name, typeId, seqId, err
	}
	return name, typeId, seqId, nil
	}

	func (p *TJSONProtocol) ReadMessageEnd() error {
	err := p.ParseListEnd()
	return err
	}

	func (p *TJSONProtocol) ReadStructBegin() (name string, err error) {
	_, err = p.ParseObjectStart()
	return "", err
	}

	func (p *TJSONProtocol) ReadStructEnd() error {
	return p.ParseObjectEnd()
	}

	func (p *TJSONProtocol) ReadFieldBegin() (string, TType, int16, error) {
	if p.reader.Buffered() < 1 {
	return "", STOP, -1, nil
	}
	b, _ := p.reader.Peek(1)
	if len(b) < 1 \|\| b[0] == JSON_RBRACE[0] \|\| b[0] == JSON_RBRACKET[0] {
	return "", STOP, -1, nil
	}
	fieldId, err := p.ReadI16()
	if err != nil {
	return "", STOP, fieldId, err
	}
	if _, err = p.ParseObjectStart(); err != nil {
	return "", STOP, fieldId, err
	}
	sType, err := p.ReadString()
	fType := p.StringToTypeId(sType)
	return "", fType, fieldId, err
	}

	func (p *TJSONProtocol) ReadFieldEnd() error {
	return p.ParseObjectEnd()
	}

	func (p *TJSONProtocol) ReadMapBegin() (keyType TType, valueType TType, size int, e error) {
	if isNull, e := p.ParseListBegin(); isNull \|\| e != nil {
	return VOID, VOID, 0, e
	}

	// read keyType
	sKeyType, e := p.ReadString()
	keyType = p.StringToTypeId(sKeyType)
	if e != nil {
	return keyType, valueType, size, e
	}

	// read valueType
	sValueType, e := p.ReadString()
	valueType = p.StringToTypeId(sValueType)
	if e != nil {
	return keyType, valueType, size, e
	}

	// read size
	iSize, err := p.ReadI64()
	size = int(iSize)
	return keyType, valueType, size, err
	}

	func (p *TJSONProtocol) ReadMapEnd() error {
	return p.ParseListEnd()
	}

	func (p *TJSONProtocol) ReadListBegin() (elemType TType, size int, e error) {
	return p.ParseElemListBegin()
	}

	func (p *TJSONProtocol) ReadListEnd() error {
	return p.ParseListEnd()
	}

	func (p *TJSONProtocol) ReadSetBegin() (elemType TType, size int, e error) {
	return p.ParseElemListBegin()
	}

	func (p *TJSONProtocol) ReadSetEnd() error {
	return p.ParseListEnd()
	}

	func (p *TJSONProtocol) ReadBool() (bool, error) {
	var value bool
	if err := p.ParsePreValue(); err != nil {
	return value, err
	}
	b, _ := p.reader.Peek(len(JSON_FALSE))
	if len(b) > 0 {
	switch b[0] {
	case JSON_TRUE[0]:
	if string(b[0:len(JSON_TRUE)]) == string(JSON_TRUE) {
	p.reader.Read(b[0:len(JSON_TRUE)])
	value = true
	} else {
	e := fmt.Errorf("Expected \"true\" but found: %s", string(b))
	return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
	}
	break
	case JSON_FALSE[0]:
	if string(b[0:len(JSON_FALSE)]) == string(JSON_FALSE) {
	p.reader.Read(b[0:len(JSON_FALSE)])
	value = false
	} else {
	e := fmt.Errorf("Expected \"false\" but found: %s", string(b))
	return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
	}
	break
	case JSON_NULL[0]:
	if string(b[0:len(JSON_NULL)]) == string(JSON_NULL) {
	p.reader.Read(b[0:len(JSON_NULL)])
	value = false
	} else {
	e := fmt.Errorf("Expected \"null\" but found: %s", string(b))
	return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
	}
	default:
	e := fmt.Errorf("Expected \"true\", \"false\", or \"null\" but found: %s", string(b))
	return value, NewTProtocolExceptionWithType(INVALID_DATA, e)
	}
	}
	return value, p.ParsePostValue()
	}

	func (p *TJSONProtocol) ReadByte() (byte, error) {
	v, err := p.ReadI64()
	return byte(v), err
	}

	func (p *TJSONProtocol) ReadI16() (int16, error) {
	v, err := p.ReadI64()
	return int16(v), err
	}

	func (p *TJSONProtocol) ReadI32() (int32, error) {
	v, err := p.ReadI64()
	return int32(v), err
	}

	func (p *TJSONProtocol) ReadI64() (int64, error) {
	v, _, err := p.ParseI64()
	return v, err
	}

	func (p *TJSONProtocol) ReadDouble() (float64, error) {
	v, _, err := p.ParseF64()
	return v, err
	}

	func (p *TJSONProtocol) ReadString() (string, error) {
	var v string
	if err := p.ParsePreValue(); err != nil {
	return v, err
	}
	b, _ := p.reader.Peek(len(JSON_NULL))
	if len(b) > 0 && b[0] == JSON_QUOTE {
	p.reader.ReadByte()
	value, err := p.ParseStringBody()
	v = value
	if err != nil {
	return v, err
	}
	} else if len(b) >= len(JSON_NULL) && string(b[0:len(JSON_NULL)]) == string(JSON_NULL) {
	_, err := p.reader.Read(b[0:len(JSON_NULL)])
	if err != nil {
	return v, NewTProtocolException(err)
	}
	} else {
	e := fmt.Errorf("Expected a JSON string, found %s", string(b))
	return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
	}
	return v, p.ParsePostValue()
	}

	func (p *TJSONProtocol) ReadBinary() ([]byte, error) {
	var v []byte
	if err := p.ParsePreValue(); err != nil {
	return nil, err
	}
	b, _ := p.reader.Peek(len(JSON_NULL))
	if len(b) > 0 && b[0] == JSON_QUOTE {
	p.reader.ReadByte()
	value, err := p.ParseBase64EncodedBody()
	v = value
	if err != nil {
	return v, err
	}
	} else if len(b) >= len(JSON_NULL) && string(b[0:len(JSON_NULL)]) == string(JSON_NULL) {
	_, err := p.reader.Read(b[0:len(JSON_NULL)])
	if err != nil {
	return v, NewTProtocolException(err)
	}
	} else {
	e := fmt.Errorf("Expected a JSON string, found %s", string(b))
	return v, NewTProtocolExceptionWithType(INVALID_DATA, e)
	}
	return v, p.ParsePostValue()
	}

	func (p *TJSONProtocol) Flush() (err error) {
	return NewTProtocolException(p.writer.Flush())
	}

	func (p *TJSONProtocol) Skip(fieldType TType) (err error) {
	return SkipDefaultDepth(p, fieldType)
	}

	func (p *TJSONProtocol) Transport() TTransport {
	return p.trans
	}

	func (p *TJSONProtocol) OutputElemListBegin(elemType TType, size int) error {
	if e := p.OutputListBegin(); e != nil {
	return e
	}
	if e := p.WriteString(p.TypeIdToString(elemType)); e != nil {
	return e
	}
	if e := p.WriteI64(int64(size)); e != nil {
	return e
	}
	return nil
	}


	func (p *TJSONProtocol) ParseElemListBegin() (elemType TType, size int, e error) {
	if isNull, e := p.ParseListBegin(); isNull \|\| e != nil {
	return VOID, 0, e
	}
	sElemType, err := p.ReadString()
	elemType = p.StringToTypeId(sElemType)
	if err != nil {
	return elemType, size, err
	}
	nSize, err2 := p.ReadI64()
	size = int(nSize)
	return elemType, size, err2
	}

	func (p *TJSONProtocol) readElemListBegin() (elemType TType, size int, e error) {
	if isNull, e := p.ParseListBegin(); isNull \|\| e != nil {
	return VOID, 0, e
	}
	sElemType, err := p.ReadString()
	elemType = p.StringToTypeId(sElemType)
	if err != nil {
	return elemType, size, err
	}
	nSize, err2 := p.ReadI64()
	size = int(nSize)
	return elemType, size, err2
	}

	func (p *TJSONProtocol) writeElemListBegin(elemType TType, size int) error {
	if e := p.OutputListBegin(); e != nil {
	return e
	}
	if e := p.OutputString(p.TypeIdToString(elemType)); e != nil {
	return e
	}
	if e := p.OutputI64(int64(size)); e != nil {
	return e
	}
	return nil
	}

	func (p *TJSONProtocol) TypeIdToString(fieldType TType) string {
	switch byte(fieldType) {
	case STOP:
	return "stp"
	case VOID:
	return "v"
	case BOOL:
	return "tf"
	case BYTE:
	return "i8"
	case DOUBLE:
	return "dbl"
	case I16:
	return "i16"
	case I32:
	return "i32"
	case I64:
	return "i64"
	case STRING:
	return "str"
	case STRUCT:
	return "rec"
	case MAP:
	return "map"
	case SET:
	return "set"
	case LIST:
	return "lst"
	case UTF16:
	return "str"
	}
	return ""
	}

	func (p *TJSONProtocol) StringToTypeId(fieldType string) TType {
	switch fieldType {
	case "stp":
	return TType(STOP)
	case "v":
	return TType(VOID)
	case "tf":
	return TType(BOOL)
	case "i8":
	return TType(BYTE)
	case "dbl":
	return TType(DOUBLE)
	case "16":
	return TType(I16)
	case "i32":
	return TType(I32)
	case "i64":
	return TType(I64)
	case "str":
	return TType(STRING)
	case "rec":
	return TType(STRUCT)
	case "map":
	return TType(MAP)
	case "set":
	return TType(SET)
	case "lst":
	return TType(LIST)
	case "u16":
	return TType(UTF16)
	}
	return TType(STOP)
	}