com.stgmastek.core.util.XMLUtil.java Source code

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Here is the source code for com.stgmastek.core.util.XMLUtil.java

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/*
 * Copyright (c) 2014 Mastek Ltd. All rights reserved.
 * 
 * This file is part of JBEAM. JBEAM 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.
 *
 * JBEAM 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 the specific language governing permissions and 
 * limitations.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with JBEAM. If not, see <http://www.gnu.org/licenses/>.
 */
package com.stgmastek.core.util;

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

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentFactory;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.dom.DOMNodeHelper;
import org.dom4j.io.SAXReader;

/**
 * @author Narayana.Koppisetty
 * 
 */
public class XMLUtil {

    private static final String DATA_XPATH = "/Request/Data";

    /**
     * Returns the response data object
     * 
     * @param responseString
     *         The response string.
     * 
     * @return List of Element instances from data tag.
     * 
     * @throws Exception 
     */
    public static List<org.w3c.dom.Element> getData(String responseString) throws Exception {

        DocumentFactory factory = new org.dom4j.dom.DOMDocumentFactory();
        SAXReader reader = new SAXReader(factory);
        List<org.w3c.dom.Element> elements = new ArrayList<org.w3c.dom.Element>();
        try {
            Document responseDocument = reader.read(new StringReader(responseString));
            org.dom4j.Node dataNode = responseDocument.selectSingleNode(DATA_XPATH);

            if ((dataNode != null) && (dataNode.getNodeType() == Node.ELEMENT_NODE)) {
                Element dataElement = (Element) dataNode;
                for (Iterator<?> nodeIterator = dataElement.elementIterator(); nodeIterator.hasNext();) {
                    Element objectNode = (Element) nodeIterator.next();
                    elements.add(DOMNodeHelper.asDOMElement(objectNode));
                }
            }

        } catch (DocumentException e) {
            throw new Exception("Invalid response", e);
        }
        return elements;
    }
}