THRIFT-222. java: Better exposure if __isset in beans style

- Generate an isSet method for each field to test its set-ness.
- Generate a generic isSet method that checks by field id.


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@731722 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/test/java/src/JavaBeansTest.java b/test/java/src/JavaBeansTest.java
new file mode 100644
index 0000000..f1d70a3
--- /dev/null
+++ b/test/java/src/JavaBeansTest.java
@@ -0,0 +1,91 @@
+package com.facebook.thrift.test;
+
+import java.util.LinkedList;
+import thrift.test.OneOfEachBeans;
+
+public class JavaBeansTest {
+  public static void main(String[] args) throws Exception {
+    // Test isSet methods
+    OneOfEachBeans ooe = new OneOfEachBeans();
+
+    // Nothing should be set
+    if (ooe.is_set_a_bite())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_base64())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_byte_list())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_double_precision())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_i16_list())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_i64_list())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_boolean_field())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_integer16())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_integer32())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_integer64())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+    if (ooe.is_set_some_characters())
+      throw new RuntimeException("isSet method error: unset field returned as set!");
+
+    for (int i = 1; i < 12; i++){
+      if (ooe.isSet(i))
+        throw new RuntimeException("isSet method error: unset field " + i + " returned as set!");
+    }
+
+    // Everything is set
+    ooe.set_a_bite((byte) 1);
+    ooe.set_base64("bytes".getBytes());
+    ooe.set_byte_list(new LinkedList());
+    ooe.set_double_precision(1);
+    ooe.set_i16_list(new LinkedList());
+    ooe.set_i64_list(new LinkedList());
+    ooe.set_boolean_field(true);
+    ooe.set_integer16((short) 1);
+    ooe.set_integer32(1);
+    ooe.set_integer64(1);
+    ooe.set_some_characters("string");
+
+    if (!ooe.is_set_a_bite())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_base64())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_byte_list())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_double_precision())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_i16_list())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_i64_list())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_boolean_field())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_integer16())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_integer32())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_integer64())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+    if (!ooe.is_set_some_characters())
+      throw new RuntimeException("isSet method error: set field returned as unset!");
+
+    for (int i = 1; i < 12; i++){
+      if (!ooe.isSet(i))
+        throw new RuntimeException("isSet method error: set field " + i + " returned as unset!");
+    }
+
+    // Should throw exception when field doesn't exist
+    boolean exceptionThrown = false;
+    try{
+      if (ooe.isSet(100));
+    } catch (IllegalArgumentException e){
+      exceptionThrown = true;
+    }
+    if (!exceptionThrown)
+      throw new RuntimeException("isSet method error: non-existent field provided as agument but no exception thrown!");
+  }
+}