Java XML Child Element Text getChildElementTextValue(Node parent, String name)

Description

Returns the text value of a child element with the given name, of the given parent element, or null if the child does not exist or does not have a child text node

License

Educational Community License

Parameter

Parameter	Description
parent	parent element
name	name of child element

Return

the text value of a child element with the given name, of the given parent element, or null if the child does not exist or does not have a child text node

Declaration

public static String getChildElementTextValue(Node parent, String name)

Method Source Code

//package com.java2s;
/**//w  w w .j  a  va  2  s  .  com
 * Copyright 2005-2014 The Kuali Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
 *
 * 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.
 */

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

public class Main {
    /**
     * Returns the text value of a child element with the given name, of the given parent element,
     * or null if the child does not exist or does not have a child text node
     * @param parent parent element
     * @param name name of child element
     * @return the text value of a child element with the given name, of the given parent element,
     * or null if the child does not exist or does not have a child text node
     */
    public static String getChildElementTextValue(Node parent, String name) {
        Element child = getChildElement(parent, name);
        if (child == null) {
            return null;
        }
        Node textNode = child.getFirstChild();
        if (textNode == null) {
            return null;
        }
        return textNode.getNodeValue();
    }

    /**
     * Returns a node child with the specified tag name of the specified parent node,
     * or null if no such child node is found.
     * @param parent the parent node
     * @param name the name of the child node
     * @return child node if found, null otherwise
     */
    public static Element getChildElement(Node parent, String name) {
        NodeList childList = parent.getChildNodes();
        for (int i = 0; i < childList.getLength(); i++) {
            Node node = childList.item(i);
            // we must test against NodeName, not just LocalName
            // LocalName seems to be null - I am guessing this is because
            // the DocumentBuilderFactory is not "namespace aware"
            // although I would have expected LocalName to default to
            // NodeName
            if (node.getNodeType() == Node.ELEMENT_NODE
                    && (name.equals(node.getLocalName()) || name
                            .equals(node.getNodeName()))) {
                return (Element) node;
            }
        }
        return null;
    }
}