lib/src/protobuf/extension.dart

// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

part of protobuf;

/**
 * An object representing an extension field.
 */
class Extension extends FieldInfo {

  final String extendee;

  Extension(this.extendee, String name, int tagNumber, int fieldType,
            [dynamic defaultOrMaker,
            CreateBuilderFunc subBuilder,
            ValueOfFunc valueOf]) :
     super(name, tagNumber, fieldType, defaultOrMaker, subBuilder, valueOf);

  int get hashCode => extendee.hashCode * 31 + tagNumber;

  bool operator ==(other) {
    if (other is! Extension) return false;

    Extension o = other;
    return extendee == o.extendee && tagNumber == o.tagNumber;
  }
}