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/* 
 * Copyright (c) 2017 Georgi Pavlov ([email protected]).
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the MIT license which accompanies 
 * this distribution, and is available at 
 * https://github.com/tengia/oauth-2/blob/master/LICENSE
 */
package commons.util;

import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;

public class ObservableMixin implements Observable {
	
	private List listeners = new ArrayList<>();

	/* (non-Javadoc)
	 * @see net.oauth2.client.Observable#registerListener(T)
	 */
	@Override
	public T attach(T listener) {
		// Add the listener to the list of registered listeners
		this.listeners.add(listener);
		return listener;
	}

	/* (non-Javadoc)
	 * @see net.oauth2.client.Observable#unregisterListener(T)
	 */
	@Override
	public void detach(T listener) {
		// Remove the listener from the list of the registered listeners
		this.listeners.remove(listener);
	}

	/* (non-Javadoc)
	 * @see net.oauth2.client.Observable#notifyListeners(java.util.function.Consumer)
	 */
	@Override
	public void notify(Consumer algorithm) {
		// Execute some function on each of the listeners
		this.listeners.forEach(algorithm);
	}
}