bundles/org.eclipse.ui.regex/src/org/eclipse/ui/regex/view/ExpressionLoader.java

/*******************************************************************************
 * Copyright (c) 2012 Stephan Brosinski
 *
 * All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Stephan Brosinski - initial API and implementation
 ******************************************************************************/
package org.eclipse.ui.regex.view;

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

public class ExpressionLoader {

	private List listener = new ArrayList();

	private static ExpressionLoader instance;

	public static ExpressionLoader getInstance() {
		if (instance == null) {
			instance = new ExpressionLoader();
		}
		return instance;
	}

	private ExpressionLoader() {
	}

	public void addExpressionLoaderListener(IExpressionLoaderListener loaderListener) {
		listener.add(loaderListener);
	}

	public void removeExpressionLoaderListener(IExpressionLoaderListener loaderListener) {
		listener.remove(loaderListener);
	}

	public void fireLoadExpression(Expression expression) {
		for (Iterator i = listener.iterator(); i.hasNext();) {
			IExpressionLoaderListener l = (IExpressionLoaderListener) i.next();
			l.loadExpression(expression);
		}
	}

}