# XMLUtil.java

    /*
     * 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 javax.xml.parsers.FactoryConfigurationError;
    import javax.xml.parsers.ParserConfigurationException;

    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;
    import org.xml.sax.SAXException;

    /**
     * This class with handle some simple XML operations.
     *
     * @author Ben Litchfield
     */
    public final 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
        {
            return parse(is, false);
        }

        /**
         * This will parse an XML stream and create a DOM document.
         *
         * @param is The stream to get the XML from.
         * @param nsAware activates namespace awareness of the parser
         * @return The DOM document.
         * @throws IOException It there is an error creating the dom.
         */
        public static Document parse(InputStream is, boolean nsAware) 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);
                builderFactory.setNamespaceAware(nsAware);
                DocumentBuilder builder = builderFactory.newDocumentBuilder();
                return builder.parse(is);
            }
            catch (FactoryConfigurationError | ParserConfigurationException | SAXException e)
            {
                throw new IOException(e.getMessage(), e);
            }
        }

        /**
         * 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)
        {
            StringBuilder sb = new StringBuilder();
            NodeList children = node.getChildNodes();
            int numNodes = children.getLength();
            for (int i = 0; i < numNodes; i++)
            {
                Node next = children.item(i);
                if (next instanceof Text)
                {
                    sb.append(next.getNodeValue());
                }
            }
            return sb.toString();
        }

    }