Checks if child element has same owner document before appending to the parent, and imports it to the parent's document if necessary. - Java XML

Java examples for XML:XML Element Child

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Description

Checks if child element has same owner document before appending to the parent, and imports it to the parent's document if necessary.

Demo Code

/**// ww  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.
 */
//package com.java2s;

import org.w3c.dom.Document;

import org.w3c.dom.Node;

public class Main {
    /**
     * Checks if child element has same owner document before 
     * appending to the parent, and imports it to the parent's document
     * if necessary.
     */
    public static void appendChild(Node parent, Node child) {
        Document ownerDoc = getOwnerDocument(parent);
        if (child.getOwnerDocument() != ownerDoc) {
            parent.appendChild(ownerDoc.importNode(child, true));
        } else {
            parent.appendChild(child);
        }
    }

    /**
     * Returns the owner document of the specified node.
     *
     * @param node the node
     * @return the owner document
     */
    public static Document getOwnerDocument(Node node) {
        if (node.getNodeType() == Node.DOCUMENT_NODE) {
            return (Document) node;
        } else {
            return node.getOwnerDocument();
        }
    }
}

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