org.apache.pdfbox.pdmodel.fdf.XMLUtil Maven / Gradle / Ivy
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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* 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.pdmodel.fdf;
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
*/
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
{
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 (FactoryConfigurationError e)
{
throw new IOException(e.getMessage(), e);
}
catch (ParserConfigurationException e)
{
throw new IOException(e.getMessage(), e);
}
catch (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();
}
}