DelegatingPreferenceChangeListener.java

/**
 * Copyright 2012 plista GmbH  (http://www.plista.com/)
 *
 * 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.plista.kornakapi.core.training.preferencechanges;

import com.google.common.collect.Lists;

import java.util.List;

/** a {@link PreferenceChangeListener} that delegates to several other listeners */
public class DelegatingPreferenceChangeListener implements PreferenceChangeListener {

  private final List<PreferenceChangeListener> delegates = Lists.newArrayList();

  public void addDelegate(PreferenceChangeListener listener) {
    delegates.add(listener);
  }

  @Override
  public void notifyOfPreferenceChange() {
    for (PreferenceChangeListener listener : delegates) {
      listener.notifyOfPreferenceChange();
    }
  }
}