Returns the first child XML node of the given root node that has the given name. - Java XML

Java examples for XML:XML Node Child

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Description

Returns the first child XML node of the given root node that has the given name.

Demo Code

/*//from   w  w  w.j a v  a 2s.c  o m
 * utils - DOMUtil.java - Copyright ? 2006-2009 David Roden
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.util.ArrayList;
import java.util.List;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    /**
     * Returns the first child node of the given root node that has the given
     * name.
     *
     * @param rootNode
     *            The root node
     * @param childName
     *            The name of the child node
     * @return The child node, or {@code null} if the root node does not have a
     *         child node with the given name
     */
    public static Node getChildNode(Node rootNode, String childName) {
        NodeList nodeList = rootNode.getChildNodes();
        for (int nodeIndex = 0, nodeSize = nodeList.getLength(); nodeIndex < nodeSize; nodeIndex++) {
            Node childNode = nodeList.item(nodeIndex);
            if (childNode.getNodeName().equals(childName)) {
                return childNode;
            }
        }
        return null;
    }

    /**
     * Returns all child nodes of the given root node with the given name.
     *
     * @param rootNode
     *            The root node
     * @param childName
     *            The name of child nodes
     * @return All child nodes with the given name, or an empty array if there
     *         are no child nodes with the given name
     */
    public static Node[] getChildNodes(Node rootNode, String childName) {
        List<Node> nodes = new ArrayList<Node>();
        NodeList nodeList = rootNode.getChildNodes();
        for (int nodeIndex = 0, nodeSize = nodeList.getLength(); nodeIndex < nodeSize; nodeIndex++) {
            Node childNode = nodeList.item(nodeIndex);
            if (childNode.getNodeName().equals(childName)) {
                nodes.add(childNode);
            }
        }
        return nodes.toArray(new Node[nodes.size()]);
    }
}

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