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/*
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 *
 * Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
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package org.glassfish.web.deployment.node;

import com.sun.enterprise.deployment.node.DeploymentDescriptorNode;
import com.sun.enterprise.deployment.node.DescriptorFactory;
import com.sun.enterprise.deployment.node.XMLElement;
import org.glassfish.web.deployment.descriptor.OrderingDescriptor;
import org.glassfish.web.deployment.xml.WebTagNames;
import org.w3c.dom.Node;

/**
 * This node is responsible for handling the ordering xml tree.
 *
 * @author  Shing Wai Chan
 * @version 
 */
public class OrderingNode extends DeploymentDescriptorNode {
    public final static XMLElement tag = new XMLElement(WebTagNames.ORDERING);
       
    protected OrderingDescriptor descriptor = null;

    public OrderingNode() {
        super();
        registerElementHandler(new XMLElement(WebTagNames.AFTER), OrderingOrderingNode.class, "setAfter");
        registerElementHandler(new XMLElement(WebTagNames.BEFORE), OrderingOrderingNode.class, "setBefore");
    }

    /**
     * @return the descriptor instance to associate with this XMLNode
     */
    @Override
    public OrderingDescriptor getDescriptor() {
        if (descriptor==null) {
            descriptor = new OrderingDescriptor();
        }
        return descriptor;
    }  

    /**
     * write the descriptor class to a DOM tree and return it
     *
     * @param parent node in the DOM tree 
     * @param node name for the root element of this xml fragment      
     * @param the descriptor to write
     * @return the DOM tree top node
     */
    public Node writeDescriptor(Node parent, String nodeName, OrderingDescriptor descriptor) {
        Node myNode = appendChild(parent, nodeName);
        if (descriptor.getAfter() != null) {
            OrderingOrderingNode afterNode = new OrderingOrderingNode();
            afterNode.writeDescriptor(myNode, WebTagNames.AFTER, descriptor.getAfter());
        }
        if (descriptor.getBefore() != null) {
            OrderingOrderingNode beforeNode = new OrderingOrderingNode();
            beforeNode.writeDescriptor(myNode, WebTagNames.BEFORE, descriptor.getBefore());
        }
        return myNode;
    }
}




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