org.jitsi.impl.configuration.xml.XMLConfUtils Maven / Gradle / Ivy

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/*
 * Copyright @ 2015 Atlassian Pty Ltd
 *
 * 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.
 */
package org.jitsi.impl.configuration.xml;

import org.jitsi.util.xml.*;
import org.w3c.dom.*;

/**
 * Common XML Tasks.
 *
 * @author Damian Minkov
 * @author Emil Ivov
 */
public class XMLConfUtils extends XMLUtils
{

    /**
     * Returns the element which is at the end of the specified
     * String chain.
     * <great...grandparent>...<grandparent>.<parent>.>child<
     * @param parent the xml element that is the parent of the root of this
     * chain.
     * @param chain a String array containing the names of all the child's
     * parent nodes.
     * @return the node represented by the specified chain
     */
    public static Element getChildElementByChain(Element parent,
                                                 String[] chain)
    {
        if(chain == null)
            return null;
        Element e = parent;
        for(int i=0; iString elements which represents the
     * path to be created. Each element of path up to and including the
     * index pathLength - 1 must be valid XML (element) names
     * @param pathLength the length of the specified path
     * @return the component at the end of the newly created path.
     */
    public static Element createLastPathComponent(
            Document doc,
            String[] path, int pathLength)
    {
        if (doc == null)
            throw new IllegalArgumentException("doc must not be null");
        if (path == null)
            throw new IllegalArgumentException("path must not be null");

        Element parent = (Element)doc.getFirstChild();

        if (parent == null)
            throw new IllegalArgumentException("parentmust not be null");

        Element e = parent;

        for (int i = 0; i < pathLength; i++)
        {
            String pathEl = path[i];
            Element newEl = findChild(e, pathEl);

            if (newEl == null)
            {
                newEl = doc.createElement(pathEl);
                e.appendChild(newEl);
            }
            e = newEl;
        }
        return e;
    }
}