Java XML Node Transform getValueOfValueNode(Node n, boolean unescape)

License

Declaration

public static String getValueOfValueNode(Node n, boolean unescape) 

Method Source Code

//package com.java2s;
/**/*w  ww.j  ava 2  s . c  o  m*/
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2006 Sun Microsystems Inc. All Rights Reserved
 *
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the License). You may not use this file except in
 * compliance with the License.
 *
 * You can obtain a copy of the License at
 * https://opensso.dev.java.net/public/CDDLv1.0.html or
 * opensso/legal/CDDLv1.0.txt
 * See the License for the specific language governing
 * permission and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * Header Notice in each file and include the License file
 * at opensso/legal/CDDLv1.0.txt.
 * If applicable, add the following below the CDDL Header,
 * with the fields enclosed by brackets [] replaced by
 * your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 *
 * $Id: XMLUtils.java,v 1.15 2009-10-19 18:19:20 asyhuang Exp $
 *
 */

import java.io.ByteArrayOutputStream;

import java.util.HashSet;

import java.util.Set;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

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

public class Main {
    /**
     * Method to get the value of "Value" node
     */
    public static String getValueOfValueNode(Node n) {
        return (getValueOfValueNode(n, true));
    }

    /**
     * Method to get the value of "Value" node
     * If <class>unescape<class> is set to false, xml escaped chars will not
     * be unescaped.
     */
    public static String getValueOfValueNode(Node n, boolean unescape) {
        return getValueOfValueNodeNoTrim(n, unescape).trim();
    }

    /**
     * Method to get the value of "Value" node
     */
    public static String getValueOfValueNodeNoTrim(Node n) {
        return (getValueOfValueNodeNoTrim(n, true));
    }

    /**
     * Method to get the value of "Value" node
     * If <class>unescape<class> is set to false, xml escaped chars will not
     * be unescaped.
     */
    public static String getValueOfValueNodeNoTrim(Node n, boolean unescape) {
        NodeList textNodes = n.getChildNodes();
        Node textNode;
        StringBuffer value = new StringBuffer("");
        for (int j = 0; j < textNodes.getLength(); j++) {
            textNode = textNodes.item(j);
            String text = null;
            if (textNode.getNodeType() == Node.TEXT_NODE) {
                text = textNode.getNodeValue();
            } else if (textNode.getNodeType() == Node.ELEMENT_NODE) {
                text = print(textNode);
            }
            if (text != null && unescape) {
                value.append(unescapeSpecialCharacters(text));
            } else {
                value.append(text);
            }
        }
        return value.toString();
    }

    public static Set getChildNodes(Node parentNode, String childName) {
        Set retVal = new HashSet();
        NodeList children = parentNode.getChildNodes();
        for (int i = 0; i < children.getLength(); i++) {
            Node node = children.item(i);
            if (node.getNodeName().equalsIgnoreCase(childName)) {
                retVal.add(node);
            }
        }
        return (retVal);
    }

    /**
     * Print a Node tree recursively using UTF-8 encoding.
     * 
     * @param node
     *            A DOM tree Node
     * @return An xml String representation of the DOM tree.
     */
    public static String print(Node node) {
        return print(node, "UTF-8");
    }

    /**
     * Prints a Node tree recursively.
     * @param node A DOM tree Node
     * @param encoding character encoding
     * @return An xml String representation of the DOM tree.
     */
    public static String print(Node node, String encoding) {
        if (node == null) {
            return null;
        }

        try {
            TransformerFactory tFactory = TransformerFactory.newInstance();
            Transformer transformer = tFactory.newTransformer();
            transformer.setOutputProperty("omit-xml-declaration", "yes");
            transformer.setOutputProperty("encoding", encoding);
            DOMSource source = new DOMSource(node);
            ByteArrayOutputStream os = new ByteArrayOutputStream(2000);
            StreamResult result = new StreamResult(os);
            transformer.transform(source, result);
            return os.toString(encoding);
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * Returns unescape special character text.
     *
     * @param text String to be unescaped.
     * @return unescape special character text.
     */
    public static String unescapeSpecialCharacters(String text) {
        text = text.replaceAll("&amp;", "&");
        text = text.replaceAll("&lt;", "<");
        text = text.replaceAll("&gt;", ">");
        text = text.replaceAll("&quot;", "\"");
        text = text.replaceAll("&apos;", "'");
        text = text.replaceAll("&#xA;", "\n");
        text = text.replaceAll("&#xD;", "\r");
        return text;
    }
}

Related

1. createInputStream(Node node)
2. createXML(Node doc)
3. getAsText(Node n)
4. getHumanReadableXml(final Node node)
5. getNodeValue(NodeList nodeList)
6. getXML(NodeList childNodes)
7. nodeToByteArray(Node node)
8. render(final Node node)
9. renderNode(final Node node, final boolean stripHeader)