Java XML Child Get by Name getChildElement(Element parent, String tagName)

Description

get Child Element

License

Open Source License

Declaration

public static Element getChildElement(Element parent, String tagName) 

Method Source Code

//package com.java2s;
/**//from w w  w.j  a  va 2s . com
 * Copyright 2015 Google Inc. All Rights Reserved.
 * 
 * Licensed 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 org.w3c.dom.Element;

import org.w3c.dom.NodeList;

public class Main {
    public static Element getChildElement(Element parent, String tagName) {
        return getChildElement(parent, tagName, false);
    }

    public static Element getChildElement(Element parent, String tagName, boolean required) {
        NodeList nodes = parent.getElementsByTagName(tagName);
        if (nodes == null || nodes.getLength() == 0) {
            if (required) {
                throw new IllegalStateException(String.format("Missing tag %s in element %s.", tagName, parent));
            } else {
                return null;
            }
        }
        return (Element) nodes.item(0);
    }
}

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