/**
 * This file Copyright (c) 2012 Magnolia International
 * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
 *
 *
 * This file is dual-licensed under both the Magnolia
 * Network Agreement and the GNU General Public License.
 * You may elect to use one or the other of these licenses.
 *
 * This file is distributed in the hope that it will be
 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
 * Redistribution, except as permitted by whichever of the GPL
 * or MNA you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or
 * modify this file under the terms of the GNU General
 * Public License, Version 3, as published by the Free Software
 * Foundation.  You should have received a copy of the GNU
 * General Public License, Version 3 along with this program;
 * if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 2. For the Magnolia Network Agreement (MNA), this file
 * and the accompanying materials are made available under the
 * terms of the MNA which accompanies this distribution, and
 * is available at http://www.magnolia-cms.com/mna.html
 *
 * Any modifications to this file must keep this entire header
 * intact.
 *
 */
package info.magnolia.jcr.decoration;

import javax.jcr.Node;

import info.magnolia.jcr.wrapper.DelegateNodeWrapper;

/**
 * Utility class for {@link ContentDecorator}.
 *
 * @version $Id$
 */
public class ContentDecoratorUtil {

    /**
     * Determines if the passed node is wrapped by a ContentDecorator that is assignment compatible with the passed
     * class. That is, it returns true if there is a wrapper on the node that is an instance of the class or one of its
     * subclasses.
     *
     * @param node node to is potentially wrapped
     * @param clazz type of the decorator
     * @return whether the node is wrapped by the class
     */
    public static boolean isDecoratedWith(Node node, Class<? extends ContentDecorator> clazz) {

        while (node instanceof DelegateNodeWrapper) {
            if (node instanceof ContentDecoratorNodeWrapper) {
                ContentDecorator contentDecorator = ((ContentDecoratorNodeWrapper) node).getContentDecorator();
                if (clazz.isInstance(contentDecorator)) {
                    return true;
                }
            }
            node = ((DelegateNodeWrapper) node).getWrappedNode();
        }

        return false;
    }
}