CompositeVisitor.java

Violations

Source code

/*
 * hgcommons 9
 * Hammurapi Group Common Library
 * Copyright (C) 2003  Hammurapi Group
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * URL: http://www.hammurapi.biz/hammurapi-biz/ef/xmenu/hammurapi-group/products/products/hgcommons/index.html
 * e-Mail: support@hammurapi.biz
 */
package biz.hammurapi.util;

import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;

/**
 * Takes collection of visitors and piggy-backs them.
 * Visitor's unwillingnes to navigate further is ignored.
 * @author Pavel Vlasov
 * @version $Revision: 1.3 $
 */
public class CompositeVisitor implements PoliteVisitor {
	private LinkedList visitors;

	/**
	 *
	 */
	public CompositeVisitor(Collection visitors) {
		this.visitors=new LinkedList(visitors);
	}

	public boolean visit(Object target) {
		Iterator it=visitors.iterator();
		while (it.hasNext()) {			
			((Visitor) it.next()).visit(target);
		}
		return !visitors.isEmpty();
	}

	public void leave(Object target) {
		Iterator it=visitors.iterator();
		while (it.hasNext()) {
			
			Object next = it.next();
			if (next instanceof PoliteVisitor) {
				((PoliteVisitor) next).leave(target);
			}
		}
	}
}