Finds and returns the first XML child node with the given qualified name. - Java XML

Java examples for XML:XML Node Child

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Description

Finds and returns the first XML child node with the given qualified name.

Demo Code

/**//ww w. j  a v a2  s  . c o m
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache 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.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 */
//package com.java2s;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

public class Main {
    /**
     * Finds and returns the first child node with the given qualified name.
     */
    public static Element getFirstChildElementNS(Node parent, String uri,
            String localpart) {

        // search for node
        Node child = parent.getFirstChild();
        while (child != null) {
            if (child.getNodeType() == Node.ELEMENT_NODE) {
                String childURI = child.getNamespaceURI();
                if (childURI != null && childURI.equals(uri)
                        && child.getLocalName().equals(localpart)) {
                    return (Element) child;
                }
            }
            child = child.getNextSibling();
        }

        // not found
        return null;

    }

    /**
     * Finds and returns the first child node with the given qualified name.
     */
    public static Element getFirstChildElementNS(Node parent,
            String[][] elemNames) {

        // search for node
        Node child = parent.getFirstChild();
        while (child != null) {
            if (child.getNodeType() == Node.ELEMENT_NODE) {
                for (String[] elemName : elemNames) {
                    String uri = child.getNamespaceURI();
                    if (uri != null && uri.equals(elemName[0])
                            && child.getLocalName().equals(elemName[1])) {
                        return (Element) child;
                    }
                }
            }
            child = child.getNextSibling();
        }

        // not found
        return null;

    }

    public static String getNamespaceURI(Node node) {
        return node.getNamespaceURI();
    }

    /**
     * returns local name of this element if not null, otherwise returns the name of the node
     */
    public static String getLocalName(Node node) {
        String name = node.getLocalName();
        return name != null ? name : node.getLocalName();
    }
}

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