Extension.java

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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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//
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//
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package com.google.protobuf;
 
// TODO(chrisn): Change ContainingType to extend Message
public abstract class Extension<ContainingType extends MessageLite, Type>
    extends ExtensionLite<ContainingType, Type> {
  // TODO(chrisn): Add package-private constructor.
 
  @Override
  public abstract Message getMessageDefaultInstance();
 
  public abstract Descriptors.FieldDescriptor getDescriptor();
 
  @Override
  final boolean isLite() {
    return false;
  }
 
  // All the methods below are extension implementation details.
 
  protected enum ExtensionType {
    IMMUTABLE,
    MUTABLE,
    PROTO1,
  }
 
  protected abstract ExtensionType getExtensionType();
 
  public enum MessageType {
    PROTO1,
    PROTO2,
  }
 
  public MessageType getMessageType() {
    return MessageType.PROTO2;
  }
 
  protected abstract Object fromReflectionType(Object value);
 
  protected abstract Object singularFromReflectionType(Object value);
 
  protected abstract Object toReflectionType(Object value);
 
  protected abstract Object singularToReflectionType(Object value);
}