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/**
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.geronimo.deployment.util;

import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;

/**
 * 
 * 
 * @version $Rev: 476049 $ $Date: 2006-11-16 20:35:17 -0800 (Thu, 16 Nov 2006) $
 */
public class XMLUtil {
    public static Object getContent(Element element) {
        NodeList nl = element.getChildNodes();
        StringBuffer content = new StringBuffer();
        for (int i = 0; i < nl.getLength(); i++) {
            Node node = nl.item(i);
            switch (node.getNodeType()) {
            case Node.ELEMENT_NODE:
                return node;
            case Node.CDATA_SECTION_NODE:
            case Node.TEXT_NODE:
                content.append(node.getNodeValue());
                break;
            }
        }
        return content.toString().trim();
    }

    public static Element getChild(Element parent, String name) {
        for (Node child = parent.getFirstChild(); child != null; child = child.getNextSibling()) {
            if (child instanceof Element && name.equals(child.getNodeName())) {
                return (Element) child;
            }
        }
        return null;
    }

    public static String getChildContent(Element parent, String name, String missing, String empty) {
        Element child = getChild(parent, name);
        if (child == null) {
            return missing;
        } else {
            String content = (String) getContent(child);
            return (content != null) ? content : empty;
        }
    }
}