Java XML First Child Element getValueOfFirstElementChild(final Element element, final String namespace, final String localname)

Description

get Value Of First Element Child

License

Open Source License

Declaration

public static String getValueOfFirstElementChild(final Element element, final String namespace,
            final String localname)

Method Source Code

//package com.java2s;
/*//  w  w w.j a v  a2  s . c o  m
 *
 * This file is part of the XiPKI project.
 * Copyright (c) 2014 - 2015 Lijun Liao
 * Author: Lijun Liao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * THE AUTHOR LIJUN LIAO. LIJUN LIAO DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the XiPKI software without
 * disclosing the source code of your own applications.
 *
 * For more information, please contact Lijun Liao at this
 * address: lijun.liao@gmail.com
 */

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

public class Main {
    public static String getValueOfFirstElementChild(final Element element, final String namespace,
            final String localname) {
        Node node = getFirstElementChild(element, namespace, localname);
        return (node == null) ? null : getNodeValue(node);
    }

    public static Element getFirstElementChild(final Element element, final String namespace,
            final String localname) {
        Node node = element.getFirstChild();
        if (node == null) {
            return null;
        }

        do {
            if (match(node, namespace, localname)) {
                return (Element) node;
            }
        } while ((node = node.getNextSibling()) != null);
        return null;
    }

    public static String getNodeValue(final Node node) {
        if (node.getNodeType() == Node.ELEMENT_NODE) {
            Node n = node.getFirstChild();
            if (n != null) {
                do {
                    if (n.getNodeType() == Node.TEXT_NODE) {
                        return n.getNodeValue();
                    }
                } while ((n = n.getNextSibling()) != null);
            }
        }

        return node.getNodeValue();
    }

    private static boolean match(final Node node, final String namespace, final String localname) {
        if (node instanceof Element) {
            Element element = (Element) node;
            if (element.getLocalName().equals(localname)) {
                if (namespace == null || namespace.equals(element.getNamespaceURI())) {
                    return true;
                }
            }
        }

        return false;
    }
}

Java XML First Child Element getValueOfFirstElementChild(final Element element, final String namespace, final String localname)

Description

License

Declaration

Method Source Code

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