Observable.java

/*
 * Copyright 2006 the original author or authors.
 *
 * 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 jdave.examples.observer;

import java.util.ArrayList;
import java.util.List;

/**
 * @author Joni Freeman
 */
public class Observable {
    private List<Observer> observers = new ArrayList<Observer>();
    
    public void register(Observer observer) {
        observers.add(observer);
    }

    public void significantEvent() {
        for (Observer observer : observers) {
            observer.onAction(this);
        }
    }
}