/**
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.waveprotocol.wave.model.conversation;

import org.waveprotocol.wave.model.util.Pair;

/**
 * An anchor represented as a conversation id and blip id. Either string may be
 * null.
 *
 * @author anorth@google.com (Alex North)
 */
public final class AnchorData {
  final Pair<String, String> anchor;

  public AnchorData(String conversationId, String blipId) {
    this.anchor = Pair.of(conversationId, blipId);
  }

  public String getConversationId() {
    return anchor.getFirst();
  }

  public String getBlipId() {
    return anchor.getSecond();
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (!(obj instanceof AnchorData)) {
      return false;
    }
    AnchorData other = (AnchorData) obj;
    return anchor.equals(other.anchor);
  }

  @Override
  public int hashCode() {
    return anchor.hashCode();
  }
}