How to use

buildPartial

method

in

com.google.protobuf.Message$Builder

private Object coerceType(final Object value) {
 if (type.isInstance(value)) {
  return value;
 } else {
  // The value is not the exact right message type.  However, if it
  // is an alternative implementation of the same type -- e.g. a
  // DynamicMessage -- we should accept it.  In this case we can make
  // a copy of the message.
  return ((Message.Builder) invokeOrDie(newBuilderMethod, null))
      .mergeFrom((Message) value).buildPartial();
 }
}

private Object coerceType(final Object value) {
 if (type.isInstance(value)) {
  return value;
 } else {
  // The value is not the exact right message type.  However, if it
  // is an alternative implementation of the same type -- e.g. a
  // DynamicMessage -- we should accept it.  In this case we can make
  // a copy of the message.
  return ((Message.Builder) invokeOrDie(newBuilderMethod, null))
      .mergeFrom((Message) value).buildPartial();
 }
}

private Object coerceType(final Object value) {
 if (type.isInstance(value)) {
  return value;
 } else {
  // The value is not the exact right message type.  However, if it
  // is an alternative implementation of the same type -- e.g. a
  // DynamicMessage -- we should accept it.  In this case we can make
  // a copy of the message.
  return ((Message.Builder) invokeOrDie(newBuilderMethod, null))
      .mergeFrom((Message) value).buildPartial();
 }
}

 @Override
 public Object finish() {
  return builder.buildPartial();
 }
}

public static final Message verifyAndConvertToMessageIfBuilder(final FieldDescriptor field,
  final Object val) {
 if (!(val instanceof MessageOrBuilder)) {
  throw new IllegalArgumentException("the value should be of MessageOrBuilder type");
 } else if (field.getMessageType() != ((MessageOrBuilder) val).getDescriptorForType()) {
  throw new IllegalArgumentException("the value of a wrong builder type");
 }
 return val instanceof Message.Builder ? ((Message.Builder) val).buildPartial() : (Message) val;
}

private Object coerceType(final Object value) {
 if (type.isInstance(value)) {
  return value;
 } else {
  // The value is not the exact right message type.  However, if it
  // is an alternative implementation of the same type -- e.g. a
  // DynamicMessage -- we should accept it.  In this case we can make
  // a copy of the message.
  return ((Message.Builder) invokeOrDie(newBuilderMethod, null))
      .mergeFrom((Message) value).buildPartial();
 }
}

@Override
public Builder addRepeatedField(final Builder builder, final FieldDescriptor field,
  final int index, final Message.Builder value) {
 return addRepeatedField(builder, field, index, value.buildPartial());
}

private Object coerceType(final Object value) {
 if (type.isInstance(value)) {
  return value;
 } else {
  // The value is not the exact right message type.  However, if it
  // is an alternative implementation of the same type -- e.g. a
  // DynamicMessage -- we should accept it.  In this case we can make
  // a copy of the message.
  return ((Message.Builder) invokeOrDie(newBuilderMethod, null))
      .mergeFrom((Message) value).buildPartial();
 }
}

@Override
public Message.Builder add() {
 add(size(), newInstance().buildPartial());
 return getLast();
}

value = subBuilder.buildPartial();
break;
value = subBuilder.buildPartial();
break;

value = subBuilder.buildPartial();

 Message.Builder subBuilder= originalMessage.toBuilder();
 subBuilder.mergeFrom(rawBytes, extensionRegistry);
 value = subBuilder.buildPartial();
} else {
 value = extension.defaultInstance.getParserForType()

private static void eagerlyMergeMessageSetExtension(
  CodedInputStream input,
  ExtensionRegistry.ExtensionInfo extension,
  ExtensionRegistryLite extensionRegistry,
  Message.Builder builder,
  FieldSet<FieldDescriptor> extensions) throws IOException {
 FieldDescriptor field = extension.descriptor;
 Message value = null;
 if (hasOriginalMessage(builder, extensions, field)) {
  Message originalMessage =
    getOriginalMessage(builder, extensions, field);
  Message.Builder subBuilder = originalMessage.toBuilder();
  input.readMessage(subBuilder, extensionRegistry);
  value = subBuilder.buildPartial();
 } else {
  value = input.readMessage(extension.defaultInstance.getParserForType(),
   extensionRegistry);
 }
 if (builder != null) {
  builder.setField(field, value);
 } else {
  extensions.setField(field, value);
 }
}

@Override
public Object parseMessageFromBytes(
  ByteString bytes,
  ExtensionRegistryLite extensionRegistry,
  Descriptors.FieldDescriptor field,
  Message defaultInstance)
  throws IOException {
 Message.Builder subBuilder;
 // When default instance is not null. The field is an extension field.
 if (defaultInstance != null) {
  subBuilder = defaultInstance.newBuilderForType();
 } else {
  subBuilder = builder.newBuilderForField(field);
 }
 if (!field.isRepeated()) {
  Message originalMessage = (Message) getField(field);
  if (originalMessage != null) {
   subBuilder.mergeFrom(originalMessage);
  }
 }
 subBuilder.mergeFrom(bytes, extensionRegistry);
 return subBuilder.buildPartial();
}

@Override
public Object parseMessage(
  CodedInputStream input,
  ExtensionRegistryLite extensionRegistry,
  Descriptors.FieldDescriptor field,
  Message defaultInstance)
  throws IOException {
 Message.Builder subBuilder;
 // When default instance is not null. The field is an extension field.
 if (defaultInstance != null) {
  subBuilder = defaultInstance.newBuilderForType();
 } else {
  subBuilder = builder.newBuilderForField(field);
 }
 if (!field.isRepeated()) {
  Message originalMessage = (Message) getField(field);
  if (originalMessage != null) {
   subBuilder.mergeFrom(originalMessage);
  }
 }
 input.readMessage(subBuilder, extensionRegistry);
 return subBuilder.buildPartial();
}

@Override
public Object parseGroup(
  CodedInputStream input,
  ExtensionRegistryLite extensionRegistry,
  Descriptors.FieldDescriptor field,
  Message defaultInstance)
  throws IOException {
 Message.Builder subBuilder;
 // When default instance is not null. The field is an extension field.
 if (defaultInstance != null) {
  subBuilder = defaultInstance.newBuilderForType();
 } else {
  subBuilder = builder.newBuilderForField(field);
 }
 if (!field.isRepeated()) {
  Message originalMessage = (Message) getField(field);
  if (originalMessage != null) {
   subBuilder.mergeFrom(originalMessage);
  }
 }
 input.readGroup(field.getNumber(), subBuilder, extensionRegistry);
 return subBuilder.buildPartial();
}

@Override
public Object parseMessage(
  CodedInputStream input,
  ExtensionRegistryLite registry,
  Descriptors.FieldDescriptor field,
  Message defaultInstance)
  throws IOException {
 Message.Builder subBuilder =
   defaultInstance.newBuilderForType();
 if (!field.isRepeated()) {
  Message originalMessage = (Message) getField(field);
  if (originalMessage != null) {
   subBuilder.mergeFrom(originalMessage);
  }
 }
 input.readMessage(subBuilder, registry);
 return subBuilder.buildPartial();
}

@Override
public Object parseGroup(
  CodedInputStream input,
  ExtensionRegistryLite registry,
  Descriptors.FieldDescriptor field,
  Message defaultInstance)
  throws IOException {
 Message.Builder subBuilder =
   defaultInstance.newBuilderForType();
 if (!field.isRepeated()) {
  Message originalMessage = (Message) getField(field);
  if (originalMessage != null) {
   subBuilder.mergeFrom(originalMessage);
  }
 }
 input.readGroup(field.getNumber(), subBuilder, registry);
 return subBuilder.buildPartial();
}

@Override
public Object parseMessageFromBytes(
  ByteString bytes,
  ExtensionRegistryLite registry,
  Descriptors.FieldDescriptor field,
  Message defaultInstance)
  throws IOException {
 Message.Builder subBuilder =  defaultInstance.newBuilderForType();
 if (!field.isRepeated()) {
  Message originalMessage = (Message) getField(field);
  if (originalMessage != null) {
   subBuilder.mergeFrom(originalMessage);
  }
 }
 subBuilder.mergeFrom(bytes, registry);
 return subBuilder.buildPartial();
}

 @Override
 public Object finish() {
  return builder.buildPartial();
 }
}