conformance/ConformanceJava.java - third_party/protobuf - Git at Google

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 //
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file or at
 // https://developers.google.com/open-source/licenses/bsd

 import com.google.protobuf.AbstractMessage;
 import com.google.protobuf.ByteString;
 import com.google.protobuf.CodedInputStream;
 import com.google.protobuf.ExtensionRegistry;
 import com.google.protobuf.InvalidProtocolBufferException;
 import com.google.protobuf.Parser;
 import com.google.protobuf.TextFormat;
 import com.google.protobuf.conformance.Conformance;
 import com.google.protobuf.util.JsonFormat;
 import com.google.protobuf.util.JsonFormat.TypeRegistry;
 import com.google.protobuf_test_messages.edition2023.TestAllTypesEdition2023;
 import com.google.protobuf_test_messages.edition2023.TestMessagesEdition2023;
 import com.google.protobuf_test_messages.editions.proto2.TestMessagesProto2Editions;
 import com.google.protobuf_test_messages.editions.proto3.TestMessagesProto3Editions;
 import com.google.protobuf_test_messages.proto2.TestMessagesProto2;
 import com.google.protobuf_test_messages.proto2.TestMessagesProto2.TestAllTypesProto2;
 import com.google.protobuf_test_messages.proto3.TestMessagesProto3;
 import com.google.protobuf_test_messages.proto3.TestMessagesProto3.TestAllTypesProto3;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;

 class ConformanceJava {
   private int testCount = 0;
   private TypeRegistry typeRegistry;

   private boolean readFromStdin(byte[] buf, int len) throws Exception {
     int ofs = 0;
     while (len > 0) {
       int read = System.in.read(buf, ofs, len);
       if (read == -1) {
         return false; // EOF
       }
       ofs += read;
       len -= read;
     }

     return true;
   }

   private void writeToStdout(byte[] buf) throws Exception {
     System.out.write(buf);
   }

   // Returns -1 on EOF (the actual values will always be positive).
   private int readLittleEndianIntFromStdin() throws Exception {
     byte[] buf = new byte[4];
     if (!readFromStdin(buf, 4)) {
       return -1;
     }
     return (buf[0] & 0xff)
         | ((buf[1] & 0xff) << 8)
         | ((buf[2] & 0xff) << 16)
         | ((buf[3] & 0xff) << 24);
   }

   private void writeLittleEndianIntToStdout(int val) throws Exception {
     byte[] buf = new byte[4];
     buf[0] = (byte) val;
     buf[1] = (byte) (val >> 8);
     buf[2] = (byte) (val >> 16);
     buf[3] = (byte) (val >> 24);
     writeToStdout(buf);
   }

   private enum BinaryDecoderType {
     BYTE_STRING_DECODER,
     BYTE_ARRAY_DECODER,
     ARRAY_BYTE_BUFFER_DECODER,
     READONLY_ARRAY_BYTE_BUFFER_DECODER,
     DIRECT_BYTE_BUFFER_DECODER,
     READONLY_DIRECT_BYTE_BUFFER_DECODER,
     INPUT_STREAM_DECODER;
   }

   private static class BinaryDecoder<T extends AbstractMessage> {
     public T decode(
         ByteString bytes, BinaryDecoderType type, Parser<T> parser, ExtensionRegistry extensions)
         throws InvalidProtocolBufferException {
       switch (type) {
         case BYTE_STRING_DECODER:
         case BYTE_ARRAY_DECODER:
           return parser.parseFrom(bytes, extensions);
         case ARRAY_BYTE_BUFFER_DECODER:
           {
             ByteBuffer buffer = ByteBuffer.allocate(bytes.size());
             bytes.copyTo(buffer);
             buffer.flip();
             return parser.parseFrom(CodedInputStream.newInstance(buffer), extensions);
           }
         case READONLY_ARRAY_BYTE_BUFFER_DECODER:
           {
             return parser.parseFrom(
                 CodedInputStream.newInstance(bytes.asReadOnlyByteBuffer()), extensions);
           }
         case DIRECT_BYTE_BUFFER_DECODER:
           {
             ByteBuffer buffer = ByteBuffer.allocateDirect(bytes.size());
             bytes.copyTo(buffer);
             buffer.flip();
             return parser.parseFrom(CodedInputStream.newInstance(buffer), extensions);
           }
         case READONLY_DIRECT_BYTE_BUFFER_DECODER:
           {
             ByteBuffer buffer = ByteBuffer.allocateDirect(bytes.size());
             bytes.copyTo(buffer);
             buffer.flip();
             return parser.parseFrom(
                 CodedInputStream.newInstance(buffer.asReadOnlyBuffer()), extensions);
           }
         case INPUT_STREAM_DECODER:
           {
             return parser.parseFrom(bytes.newInput(), extensions);
           }
       }
       return null;
     }
   }

   private <T extends AbstractMessage> T parseBinary(
       ByteString bytes, Parser<T> parser, ExtensionRegistry extensions)
       throws InvalidProtocolBufferException {
     ArrayList<T> messages = new ArrayList<>();
     ArrayList<InvalidProtocolBufferException> exceptions = new ArrayList<>();

     for (int i = 0; i < BinaryDecoderType.values().length; i++) {
       messages.add(null);
       exceptions.add(null);
     }
     if (messages.isEmpty()) {
       throw new RuntimeException("binary decoder types missing");
     }

     BinaryDecoder<T> decoder = new BinaryDecoder<>();

     boolean hasMessage = false;
     boolean hasException = false;
     for (int i = 0; i < BinaryDecoderType.values().length; ++i) {
       try {
         // = BinaryDecoderType.values()[i].parseProto3(bytes);
         messages.set(i, decoder.decode(bytes, BinaryDecoderType.values()[i], parser, extensions));
         hasMessage = true;
       } catch (InvalidProtocolBufferException e) {
         exceptions.set(i, e);
         hasException = true;
       }
     }

     if (hasMessage && hasException) {
       StringBuilder sb =
           new StringBuilder("Binary decoders disagreed on whether the payload was valid.\n");
       for (int i = 0; i < BinaryDecoderType.values().length; ++i) {
         sb.append(BinaryDecoderType.values()[i].name());
         if (messages.get(i) != null) {
           sb.append(" accepted the payload.\n");
         } else {
           sb.append(" rejected the payload.\n");
         }
       }
       throw new RuntimeException(sb.toString());
     }

     if (hasException) {
       // We do not check if exceptions are equal. Different implementations may return different
       // exception messages. Throw an arbitrary one out instead.
       InvalidProtocolBufferException exception = null;
       for (InvalidProtocolBufferException e : exceptions) {
         if (exception != null) {
           exception.addSuppressed(e);
         } else {
           exception = e;
         }
       }
       throw exception;
     }

     // Fast path comparing all the messages with the first message, assuming equality being
     // symmetric and transitive.
     boolean allEqual = true;
     for (int i = 1; i < messages.size(); ++i) {
       if (!messages.get(0).equals(messages.get(i))) {
         allEqual = false;
         break;
       }
     }

     // Slow path: compare and find out all unequal pairs.
     if (!allEqual) {
       StringBuilder sb = new StringBuilder();
       for (int i = 0; i < messages.size() - 1; ++i) {
         for (int j = i + 1; j < messages.size(); ++j) {
           if (!messages.get(i).equals(messages.get(j))) {
             sb.append(BinaryDecoderType.values()[i].name())
                 .append(" and ")
                 .append(BinaryDecoderType.values()[j].name())
                 .append(" parsed the payload differently.\n");
           }
         }
       }
       throw new RuntimeException(sb.toString());
     }

     return messages.get(0);
   }

   private Class<? extends AbstractMessage> createTestMessage(String messageType) {
     switch (messageType) {
       case "protobuf_test_messages.proto3.TestAllTypesProto3":
         return TestAllTypesProto3.class;
       case "protobuf_test_messages.proto2.TestAllTypesProto2":
         return TestAllTypesProto2.class;
       case "protobuf_test_messages.editions.TestAllTypesEdition2023":
         return TestAllTypesEdition2023.class;
       case "protobuf_test_messages.editions.proto3.TestAllTypesProto3":
         return TestMessagesProto3Editions.TestAllTypesProto3.class;
       case "protobuf_test_messages.editions.proto2.TestAllTypesProto2":
         return TestMessagesProto2Editions.TestAllTypesProto2.class;
       default:
         throw new IllegalArgumentException(
             "Protobuf request has unexpected payload type: " + messageType);
     }
   }

   private Class<?> createTestFile(String messageType) {
     switch (messageType) {
       case "protobuf_test_messages.proto3.TestAllTypesProto3":
         return TestMessagesProto3.class;
       case "protobuf_test_messages.proto2.TestAllTypesProto2":
         return TestMessagesProto2.class;
       case "protobuf_test_messages.editions.TestAllTypesEdition2023":
         return TestMessagesEdition2023.class;
       case "protobuf_test_messages.editions.proto3.TestAllTypesProto3":
         return TestMessagesProto3Editions.class;
       case "protobuf_test_messages.editions.proto2.TestAllTypesProto2":
         return TestMessagesProto2Editions.class;
       default:
         throw new IllegalArgumentException(
             "Protobuf request has unexpected payload type: " + messageType);
     }
   }

   @SuppressWarnings("unchecked")
   private Conformance.ConformanceResponse doTest(Conformance.ConformanceRequest request) {
     AbstractMessage testMessage;
     String messageType = request.getMessageType();

     ExtensionRegistry extensions = ExtensionRegistry.newInstance();
     try {
       createTestFile(messageType)
           .getMethod("registerAllExtensions", ExtensionRegistry.class)
           .invoke(null, extensions);
     } catch (Exception e) {
       throw new RuntimeException(e);
     }

     switch (request.getPayloadCase()) {
       case PROTOBUF_PAYLOAD:
         {
           try {
             testMessage =
                 parseBinary(
                     request.getProtobufPayload(),
                     (Parser<AbstractMessage>)
                         createTestMessage(messageType).getMethod("parser").invoke(null),
                     extensions);
           } catch (InvalidProtocolBufferException e) {
             return Conformance.ConformanceResponse.newBuilder()
                 .setParseError(e.getMessage())
                 .build();
           } catch (Exception e) {
             throw new RuntimeException(e);
           }
           break;
         }
       case JSON_PAYLOAD:
         {
           try {
             JsonFormat.Parser parser = JsonFormat.parser().usingTypeRegistry(typeRegistry);
             if (request.getTestCategory()
                 == Conformance.TestCategory.JSON_IGNORE_UNKNOWN_PARSING_TEST) {
               parser = parser.ignoringUnknownFields();
             }
             AbstractMessage.Builder<?> builder =
                 (AbstractMessage.Builder<?>)
                     createTestMessage(messageType).getMethod("newBuilder").invoke(null);
             parser.merge(request.getJsonPayload(), builder);
             testMessage = (AbstractMessage) builder.build();
           } catch (InvalidProtocolBufferException e) {
             return Conformance.ConformanceResponse.newBuilder()
                 .setParseError(e.getMessage())
                 .build();
           } catch (Exception e) {
             throw new RuntimeException(e);
           }
           break;
         }
       case TEXT_PAYLOAD:
         {
           try {
             AbstractMessage.Builder<?> builder =
                 (AbstractMessage.Builder<?>)
                     createTestMessage(messageType).getMethod("newBuilder").invoke(null);
             TextFormat.merge(request.getTextPayload(), extensions, builder);
             testMessage = (AbstractMessage) builder.build();
             } catch (TextFormat.ParseException e) {
               return Conformance.ConformanceResponse.newBuilder()
                   .setParseError(e.getMessage())
                   .build();
           } catch (Exception e) {
             throw new RuntimeException(e);
           }
           break;
         }
       case PAYLOAD_NOT_SET:
         {
           throw new IllegalArgumentException("Request didn't have payload.");
         }

       default:
         {
           throw new IllegalArgumentException("Unexpected payload case.");
         }
     }

     switch (request.getRequestedOutputFormat()) {
       case UNSPECIFIED:
         throw new IllegalArgumentException("Unspecified output format.");

       case PROTOBUF:
         {
           ByteString messageString = testMessage.toByteString();
           return Conformance.ConformanceResponse.newBuilder()
               .setProtobufPayload(messageString)
               .build();
         }

       case JSON:
         try {
           return Conformance.ConformanceResponse.newBuilder()
               .setJsonPayload(
                   JsonFormat.printer().usingTypeRegistry(typeRegistry).print(testMessage))
               .build();
         } catch (InvalidProtocolBufferException | IllegalArgumentException e) {
           return Conformance.ConformanceResponse.newBuilder()
               .setSerializeError(e.getMessage())
               .build();
         }

       case TEXT_FORMAT:
         return Conformance.ConformanceResponse.newBuilder()
             .setTextPayload(TextFormat.printer().printToString(testMessage))
             .build();

       default:
         {
           throw new IllegalArgumentException("Unexpected request output.");
         }
     }
   }

   private boolean doTestIo() throws Exception {
     int bytes = readLittleEndianIntFromStdin();

     if (bytes == -1) {
       return false; // EOF
     }

     byte[] serializedInput = new byte[bytes];

     if (!readFromStdin(serializedInput, bytes)) {
       throw new RuntimeException("Unexpected EOF from test program.");
     }

     Conformance.ConformanceRequest request =
         Conformance.ConformanceRequest.parseFrom(serializedInput);
     Conformance.ConformanceResponse response = doTest(request);
     byte[] serializedOutput = response.toByteArray();

     writeLittleEndianIntToStdout(serializedOutput.length);
     writeToStdout(serializedOutput);

     return true;
   }

   public void run() throws Exception {
     typeRegistry =
         TypeRegistry.newBuilder()
             .add(TestMessagesProto3.TestAllTypesProto3.getDescriptor())
             .add(
                 com.google.protobuf_test_messages.editions.proto3.TestMessagesProto3Editions
                     .TestAllTypesProto3.getDescriptor())
             .build();
     while (doTestIo()) {
       this.testCount++;
     }

     System.err.println(
         "ConformanceJava: received EOF from test runner after " + this.testCount + " tests");
   }

   public static void main(String[] args) throws Exception {
     new ConformanceJava().run();
   }
 }
	// Protocol Buffers - Google's data interchange format
	// Copyright 2008 Google Inc. All rights reserved.
	//
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file or at
	// https://developers.google.com/open-source/licenses/bsd

	import com.google.protobuf.AbstractMessage;
	import com.google.protobuf.ByteString;
	import com.google.protobuf.CodedInputStream;
	import com.google.protobuf.ExtensionRegistry;
	import com.google.protobuf.InvalidProtocolBufferException;
	import com.google.protobuf.Parser;
	import com.google.protobuf.TextFormat;
	import com.google.protobuf.conformance.Conformance;
	import com.google.protobuf.util.JsonFormat;
	import com.google.protobuf.util.JsonFormat.TypeRegistry;
	import com.google.protobuf_test_messages.edition2023.TestAllTypesEdition2023;
	import com.google.protobuf_test_messages.edition2023.TestMessagesEdition2023;
	import com.google.protobuf_test_messages.editions.proto2.TestMessagesProto2Editions;
	import com.google.protobuf_test_messages.editions.proto3.TestMessagesProto3Editions;
	import com.google.protobuf_test_messages.proto2.TestMessagesProto2;
	import com.google.protobuf_test_messages.proto2.TestMessagesProto2.TestAllTypesProto2;
	import com.google.protobuf_test_messages.proto3.TestMessagesProto3;
	import com.google.protobuf_test_messages.proto3.TestMessagesProto3.TestAllTypesProto3;
	import java.nio.ByteBuffer;
	import java.util.ArrayList;

	class ConformanceJava {
	private int testCount = 0;
	private TypeRegistry typeRegistry;

	private boolean readFromStdin(byte[] buf, int len) throws Exception {
	int ofs = 0;
	while (len > 0) {
	int read = System.in.read(buf, ofs, len);
	if (read == -1) {
	return false; // EOF
	}
	ofs += read;
	len -= read;
	}

	return true;
	}

	private void writeToStdout(byte[] buf) throws Exception {
	System.out.write(buf);
	}

	// Returns -1 on EOF (the actual values will always be positive).
	private int readLittleEndianIntFromStdin() throws Exception {
	byte[] buf = new byte[4];
	if (!readFromStdin(buf, 4)) {
	return -1;
	}
	return (buf[0] & 0xff)
	\| ((buf[1] & 0xff) << 8)
	\| ((buf[2] & 0xff) << 16)
	\| ((buf[3] & 0xff) << 24);
	}

	private void writeLittleEndianIntToStdout(int val) throws Exception {
	byte[] buf = new byte[4];
	buf[0] = (byte) val;
	buf[1] = (byte) (val >> 8);
	buf[2] = (byte) (val >> 16);
	buf[3] = (byte) (val >> 24);
	writeToStdout(buf);
	}

	private enum BinaryDecoderType {
	BYTE_STRING_DECODER,
	BYTE_ARRAY_DECODER,
	ARRAY_BYTE_BUFFER_DECODER,
	READONLY_ARRAY_BYTE_BUFFER_DECODER,
	DIRECT_BYTE_BUFFER_DECODER,
	READONLY_DIRECT_BYTE_BUFFER_DECODER,
	INPUT_STREAM_DECODER;
	}

	private static class BinaryDecoder<T extends AbstractMessage> {
	public T decode(
	ByteString bytes, BinaryDecoderType type, Parser<T> parser, ExtensionRegistry extensions)
	throws InvalidProtocolBufferException {
	switch (type) {
	case BYTE_STRING_DECODER:
	case BYTE_ARRAY_DECODER:
	return parser.parseFrom(bytes, extensions);
	case ARRAY_BYTE_BUFFER_DECODER:
	{
	ByteBuffer buffer = ByteBuffer.allocate(bytes.size());
	bytes.copyTo(buffer);
	buffer.flip();
	return parser.parseFrom(CodedInputStream.newInstance(buffer), extensions);
	}
	case READONLY_ARRAY_BYTE_BUFFER_DECODER:
	{
	return parser.parseFrom(
	CodedInputStream.newInstance(bytes.asReadOnlyByteBuffer()), extensions);
	}
	case DIRECT_BYTE_BUFFER_DECODER:
	{
	ByteBuffer buffer = ByteBuffer.allocateDirect(bytes.size());
	bytes.copyTo(buffer);
	buffer.flip();
	return parser.parseFrom(CodedInputStream.newInstance(buffer), extensions);
	}
	case READONLY_DIRECT_BYTE_BUFFER_DECODER:
	{
	ByteBuffer buffer = ByteBuffer.allocateDirect(bytes.size());
	bytes.copyTo(buffer);
	buffer.flip();
	return parser.parseFrom(
	CodedInputStream.newInstance(buffer.asReadOnlyBuffer()), extensions);
	}
	case INPUT_STREAM_DECODER:
	{
	return parser.parseFrom(bytes.newInput(), extensions);
	}
	}
	return null;
	}
	}

	private <T extends AbstractMessage> T parseBinary(
	ByteString bytes, Parser<T> parser, ExtensionRegistry extensions)
	throws InvalidProtocolBufferException {
	ArrayList<T> messages = new ArrayList<>();
	ArrayList<InvalidProtocolBufferException> exceptions = new ArrayList<>();

	for (int i = 0; i < BinaryDecoderType.values().length; i++) {
	messages.add(null);
	exceptions.add(null);
	}
	if (messages.isEmpty()) {
	throw new RuntimeException("binary decoder types missing");
	}

	BinaryDecoder<T> decoder = new BinaryDecoder<>();

	boolean hasMessage = false;
	boolean hasException = false;
	for (int i = 0; i < BinaryDecoderType.values().length; ++i) {
	try {
	// = BinaryDecoderType.values()[i].parseProto3(bytes);
	messages.set(i, decoder.decode(bytes, BinaryDecoderType.values()[i], parser, extensions));
	hasMessage = true;
	} catch (InvalidProtocolBufferException e) {
	exceptions.set(i, e);
	hasException = true;
	}
	}

	if (hasMessage && hasException) {
	StringBuilder sb =
	new StringBuilder("Binary decoders disagreed on whether the payload was valid.\n");
	for (int i = 0; i < BinaryDecoderType.values().length; ++i) {
	sb.append(BinaryDecoderType.values()[i].name());
	if (messages.get(i) != null) {
	sb.append(" accepted the payload.\n");
	} else {
	sb.append(" rejected the payload.\n");
	}
	}
	throw new RuntimeException(sb.toString());
	}

	if (hasException) {
	// We do not check if exceptions are equal. Different implementations may return different
	// exception messages. Throw an arbitrary one out instead.
	InvalidProtocolBufferException exception = null;
	for (InvalidProtocolBufferException e : exceptions) {
	if (exception != null) {
	exception.addSuppressed(e);
	} else {
	exception = e;
	}
	}
	throw exception;
	}

	// Fast path comparing all the messages with the first message, assuming equality being
	// symmetric and transitive.
	boolean allEqual = true;
	for (int i = 1; i < messages.size(); ++i) {
	if (!messages.get(0).equals(messages.get(i))) {
	allEqual = false;
	break;
	}
	}

	// Slow path: compare and find out all unequal pairs.
	if (!allEqual) {
	StringBuilder sb = new StringBuilder();
	for (int i = 0; i < messages.size() - 1; ++i) {
	for (int j = i + 1; j < messages.size(); ++j) {
	if (!messages.get(i).equals(messages.get(j))) {
	sb.append(BinaryDecoderType.values()[i].name())
	.append(" and ")
	.append(BinaryDecoderType.values()[j].name())
	.append(" parsed the payload differently.\n");
	}
	}
	}
	throw new RuntimeException(sb.toString());
	}

	return messages.get(0);
	}

	private Class<? extends AbstractMessage> createTestMessage(String messageType) {
	switch (messageType) {
	case "protobuf_test_messages.proto3.TestAllTypesProto3":
	return TestAllTypesProto3.class;
	case "protobuf_test_messages.proto2.TestAllTypesProto2":
	return TestAllTypesProto2.class;
	case "protobuf_test_messages.editions.TestAllTypesEdition2023":
	return TestAllTypesEdition2023.class;
	case "protobuf_test_messages.editions.proto3.TestAllTypesProto3":
	return TestMessagesProto3Editions.TestAllTypesProto3.class;
	case "protobuf_test_messages.editions.proto2.TestAllTypesProto2":
	return TestMessagesProto2Editions.TestAllTypesProto2.class;
	default:
	throw new IllegalArgumentException(
	"Protobuf request has unexpected payload type: " + messageType);
	}
	}

	private Class<?> createTestFile(String messageType) {
	switch (messageType) {
	case "protobuf_test_messages.proto3.TestAllTypesProto3":
	return TestMessagesProto3.class;
	case "protobuf_test_messages.proto2.TestAllTypesProto2":
	return TestMessagesProto2.class;
	case "protobuf_test_messages.editions.TestAllTypesEdition2023":
	return TestMessagesEdition2023.class;
	case "protobuf_test_messages.editions.proto3.TestAllTypesProto3":
	return TestMessagesProto3Editions.class;
	case "protobuf_test_messages.editions.proto2.TestAllTypesProto2":
	return TestMessagesProto2Editions.class;
	default:
	throw new IllegalArgumentException(
	"Protobuf request has unexpected payload type: " + messageType);
	}
	}

	@SuppressWarnings("unchecked")
	private Conformance.ConformanceResponse doTest(Conformance.ConformanceRequest request) {
	AbstractMessage testMessage;
	String messageType = request.getMessageType();

	ExtensionRegistry extensions = ExtensionRegistry.newInstance();
	try {
	createTestFile(messageType)
	.getMethod("registerAllExtensions", ExtensionRegistry.class)
	.invoke(null, extensions);
	} catch (Exception e) {
	throw new RuntimeException(e);
	}

	switch (request.getPayloadCase()) {
	case PROTOBUF_PAYLOAD:
	{
	try {
	testMessage =
	parseBinary(
	request.getProtobufPayload(),
	(Parser<AbstractMessage>)
	createTestMessage(messageType).getMethod("parser").invoke(null),
	extensions);
	} catch (InvalidProtocolBufferException e) {
	return Conformance.ConformanceResponse.newBuilder()
	.setParseError(e.getMessage())
	.build();
	} catch (Exception e) {
	throw new RuntimeException(e);
	}
	break;
	}
	case JSON_PAYLOAD:
	{
	try {
	JsonFormat.Parser parser = JsonFormat.parser().usingTypeRegistry(typeRegistry);
	if (request.getTestCategory()
	== Conformance.TestCategory.JSON_IGNORE_UNKNOWN_PARSING_TEST) {
	parser = parser.ignoringUnknownFields();
	}
	AbstractMessage.Builder<?> builder =
	(AbstractMessage.Builder<?>)
	createTestMessage(messageType).getMethod("newBuilder").invoke(null);
	parser.merge(request.getJsonPayload(), builder);
	testMessage = (AbstractMessage) builder.build();
	} catch (InvalidProtocolBufferException e) {
	return Conformance.ConformanceResponse.newBuilder()
	.setParseError(e.getMessage())
	.build();
	} catch (Exception e) {
	throw new RuntimeException(e);
	}
	break;
	}
	case TEXT_PAYLOAD:
	{
	try {
	AbstractMessage.Builder<?> builder =
	(AbstractMessage.Builder<?>)
	createTestMessage(messageType).getMethod("newBuilder").invoke(null);
	TextFormat.merge(request.getTextPayload(), extensions, builder);
	testMessage = (AbstractMessage) builder.build();
	} catch (TextFormat.ParseException e) {
	return Conformance.ConformanceResponse.newBuilder()
	.setParseError(e.getMessage())
	.build();
	} catch (Exception e) {
	throw new RuntimeException(e);
	}
	break;
	}
	case PAYLOAD_NOT_SET:
	{
	throw new IllegalArgumentException("Request didn't have payload.");
	}

	default:
	{
	throw new IllegalArgumentException("Unexpected payload case.");
	}
	}

	switch (request.getRequestedOutputFormat()) {
	case UNSPECIFIED:
	throw new IllegalArgumentException("Unspecified output format.");

	case PROTOBUF:
	{
	ByteString messageString = testMessage.toByteString();
	return Conformance.ConformanceResponse.newBuilder()
	.setProtobufPayload(messageString)
	.build();
	}

	case JSON:
	try {
	return Conformance.ConformanceResponse.newBuilder()
	.setJsonPayload(
	JsonFormat.printer().usingTypeRegistry(typeRegistry).print(testMessage))
	.build();
	} catch (InvalidProtocolBufferException \| IllegalArgumentException e) {
	return Conformance.ConformanceResponse.newBuilder()
	.setSerializeError(e.getMessage())
	.build();
	}

	case TEXT_FORMAT:
	return Conformance.ConformanceResponse.newBuilder()
	.setTextPayload(TextFormat.printer().printToString(testMessage))
	.build();

	default:
	{
	throw new IllegalArgumentException("Unexpected request output.");
	}
	}
	}

	private boolean doTestIo() throws Exception {
	int bytes = readLittleEndianIntFromStdin();

	if (bytes == -1) {
	return false; // EOF
	}

	byte[] serializedInput = new byte[bytes];

	if (!readFromStdin(serializedInput, bytes)) {
	throw new RuntimeException("Unexpected EOF from test program.");
	}

	Conformance.ConformanceRequest request =
	Conformance.ConformanceRequest.parseFrom(serializedInput);
	Conformance.ConformanceResponse response = doTest(request);
	byte[] serializedOutput = response.toByteArray();

	writeLittleEndianIntToStdout(serializedOutput.length);
	writeToStdout(serializedOutput);

	return true;
	}

	public void run() throws Exception {
	typeRegistry =
	TypeRegistry.newBuilder()
	.add(TestMessagesProto3.TestAllTypesProto3.getDescriptor())
	.add(
	com.google.protobuf_test_messages.editions.proto3.TestMessagesProto3Editions
	.TestAllTypesProto3.getDescriptor())
	.build();
	while (doTestIo()) {
	this.testCount++;
	}

	System.err.println(
	"ConformanceJava: received EOF from test runner after " + this.testCount + " tests");
	}

	public static void main(String[] args) throws Exception {
	new ConformanceJava().run();
	}
	}