org.apache.pdfbox.util.XMLUtil Maven / Gradle / Ivy

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The Apache PDFBox library is an open source Java tool for working with PDF documents.
There is a newer version: 3.0.2
/*
 * 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 org.apache.pdfbox.util;

import java.io.InputStream;
import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;

/**
 * This class with handle some simple XML operations.
 *
 * @author Ben Litchfield
 * @version $Revision: 1.3 $
 */
public class XMLUtil
{
    /**
     * Utility class, should not be instantiated.
     *
     */
    private XMLUtil()
    {
    }

    /**
     * This will parse an XML stream and create a DOM document.
     *
     * @param is The stream to get the XML from.
     * @return The DOM document.
     * @throws IOException It there is an error creating the dom.
     */
    public static Document parse( InputStream is ) throws IOException
    {
        try
        {
            DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
            builderFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
            builderFactory.setFeature("http://xml.org/sax/features/external-general-entities", false);
            builderFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
            builderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
            builderFactory.setXIncludeAware(false);
            builderFactory.setExpandEntityReferences(false);
            DocumentBuilder builder = builderFactory.newDocumentBuilder();
            return builder.parse( is );
        }
        catch( Exception e )
        {
            IOException thrown = new IOException( e.getMessage() );
            throw thrown;
        }
    }

    /**
     * This will get the text value of an element.
     *
     * @param node The node to get the text value for.
     * @return The text of the node.
     */
    public static String getNodeValue( Element node )
    {
        String retval = "";
        NodeList children = node.getChildNodes();
        for( int i=0; i