/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 YaoGC;

/**
 * {@code Observer} is the interface to be implemented by objects that receive
 * notification of updates on an {@code Observable} object.
 * 
 * @see Observable
 */
public interface TransitiveObserver {

	/**
	 * This method is called if the specified {@code Observable} object's
	 * {@code notifyObservers} method is called (because the {@code Observable}
	 * object has been updated.
	 * 
	 * @param observable
	 *            the {@link Observable} object.
	 * @param data
	 *            the data passed to {@link Observable#notifyObservers(Object)}.
	 */
	void update(boolean evaluate, TransitiveObservable observable, Object data);
}
