Java XML Child Node Get getChildNodeValue(Element root, String childNodeName, String defaultValue)

Description

get Child Node Value

License

Open Source License

Declaration

static String getChildNodeValue(Element root, String childNodeName,
            String defaultValue) throws SAXException 

Method Source Code

//package com.java2s;
/********************************************************************************************************************
 * $Id: XMLUtils.java 604 2004-02-26 17:36:47Z russgold $
 *
 * Copyright (c) 2004, Russell Gold//from w w w.  java2s  .  com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
 * to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
 * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 *******************************************************************************************************************/

import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;

public class Main {
    static String getChildNodeValue(Element root, String childNodeName)
            throws SAXException {
        return getChildNodeValue(root, childNodeName, null);
    }

    static String getChildNodeValue(Element root, String childNodeName,
            String defaultValue) throws SAXException {
        NodeList nl = root.getElementsByTagName(childNodeName);
        if (nl.getLength() == 1) {
            return getTextValue(nl.item(0)).trim();
        } else if (defaultValue == null) {
            throw new SAXException("Node <" + root.getNodeName()
                    + "> has no child named <" + childNodeName + ">");
        } else {
            return defaultValue;
        }
    }

    static String getTextValue(Node node) throws SAXException {
        Node textNode = node.getFirstChild();
        if (textNode == null)
            return "";
        if (textNode.getNodeType() != Node.TEXT_NODE)
            throw new SAXException("No text value found for <"
                    + node.getNodeName() + "> node");
        return textNode.getNodeValue();
    }
}

Related

1. getChildNodeText(Element element, String nodeTagName)
2. getChildNodeText(Node root, String childName)
3. getChildNodeTextContent(Node parentNode, String childElementName)
4. getChildNodeTextContents(Node node, String name)
5. getChildNodeValue(Element node, String tagName)
6. getChildNodeValue(Node node, String elementName)
7. getChildNodeValue(Node root, String childName, boolean emptyStringOnMissingChild)
8. getChildNodeValue(String childNodeName, Node n)
9. getChildNodeValueByName(Node parent, String nodeName)