Java XML Child Get getChild(final Element element, final String tagName)

Description

get Child

License

Apache License

Declaration

public static Element getChild(final Element element, final String tagName) 

Method Source Code

//package com.java2s;
/*//from w w w. j  a v  a 2 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.
 */

import java.util.ArrayList;
import java.util.List;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    public static Element getChild(final Element element, final String tagName) {
        final List<Element> children = getChildElementsByTagName(element, tagName);
        if (children.isEmpty()) {
            return null;
        }

        if (children.size() > 1) {
            return null;
        }

        return children.get(0);
    }

    public static List<Element> getChildElementsByTagName(final Element element, final String tagName) {
        final List<Element> matches = new ArrayList<>();
        final NodeList nodeList = element.getChildNodes();
        for (int i = 0; i < nodeList.getLength(); i++) {
            final Node node = nodeList.item(i);
            if (!(node instanceof Element)) {
                continue;
            }

            final Element child = (Element) nodeList.item(i);
            if (child.getNodeName().equals(tagName)) {
                matches.add(child);
            }
        }

        return matches;
    }
}

Related

1. getChild(Element parent, String name)
2. getChild(Element parent, String name)
3. getChild(Element parent, String name)
4. getChild(Element parentEl, String name)
5. getChild(Element root, String... path)
6. getChild(final Element parent, final String tag)
7. getChild(final Element root, final String name)
8. getChild(final Element root, final String name)
9. getChild(Node n, String name)