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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
package com.sun.star.script.framework.container;
import com.sun.star.script.framework.log.LogUtils;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.XMLConstants;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class XMLParserFactory {
private static XMLParser parser = null;
private static String officedtdurl = null;
private XMLParserFactory() {}
public static synchronized XMLParser getParser() {
if (parser == null)
parser = new DefaultParser();
return parser;
}
public static void setOfficeDTDURL(String url) {
officedtdurl = url;
}
private static class DefaultParser implements XMLParser {
private final DocumentBuilderFactory factory;
public DefaultParser() {
factory = DocumentBuilderFactory.newInstance();
try {
factory.setFeature("http://xml.org/sax/features/external-general-entities", false);
} catch (ParserConfigurationException e) {
LogUtils.DEBUG(LogUtils.getTrace(e));
}
try {
factory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
} catch (ParserConfigurationException e) {
LogUtils.DEBUG(LogUtils.getTrace(e));
}
try {
factory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
} catch (ParserConfigurationException e) {
LogUtils.DEBUG(LogUtils.getTrace(e));
}
try {
factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
} catch (ParserConfigurationException e) {
LogUtils.DEBUG(LogUtils.getTrace(e));
}
}
public Document parse(InputStream inputStream) throws IOException {
Document result = null;
try {
DocumentBuilder builder = factory.newDocumentBuilder();
InputSource is = new InputSource(inputStream);
if (officedtdurl != null) {
is.setSystemId(officedtdurl);
}
result = builder.parse(is);
} catch (SAXParseException ex1) {
IOException ex2 = new IOException();
ex2.initCause(ex1);
throw ex2;
} catch (SAXException ex1) {
IOException ex2 = new IOException();
ex2.initCause(ex1);
throw ex2;
} catch (ParserConfigurationException ex1) {
IOException ex2 = new IOException();
ex2.initCause(ex1);
throw ex2;
}
return result;
}
public void write(Document doc, OutputStream out) throws IOException {
try {
TransformerFactory transformerFactory = TransformerFactory.newInstance();
transformerFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
transformerFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET, "");
transformerFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
transformerFactory.newTransformer().transform(
new DOMSource(doc), new StreamResult(out));
} catch (TransformerException ex1) {
IOException ex2 = new IOException();
ex2.initCause(ex1);
throw ex2;
}
}
}
}
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