/**
 * Copyright 2008 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.testing;

import org.waveprotocol.wave.model.wave.ObservableWavelet;
import org.waveprotocol.wave.model.wave.WaveletListener;
import org.waveprotocol.wave.model.wave.opbased.WaveletListenerImpl;

import org.waveprotocol.wave.model.wave.ParticipantId;

/**
 * Stub implementation of {@link WaveletListener}.  Each notification method
 * saves the passed parameters for later inspection by accessors.
 *
 * @author zdwang@google.com (David Wang)
 */
public class FakeWaveletListener extends WaveletListenerImpl {
  /** The last participant received from 
   * {@link #onParticipantAdded(ObservableWavelet, ParticipantId)}
   */
  private ParticipantId participant;

  @Override
  public void onParticipantAdded(ObservableWavelet wavelet, ParticipantId participant) {
    this.participant = participant;
  }

  /**
   * @return the last {@code participant} received by 
   * {@link #onParticipantAdded(ObservableWavelet, ParticipantId)}.
   */
  public ParticipantId getParticipant() {
    return participant;
  }


  /** Resets all fields. */
  public void reset() {
    this.participant = null;
  }
}