/**
* 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.cxf.bus.spring;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.sax.SAXSource;
import org.w3c.dom.Document;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import com.sun.xml.fastinfoset.stax.StAXDocumentParser;
import org.apache.cxf.staxutils.StaxUtils;
import org.apache.cxf.staxutils.W3CDOMStreamWriter;
import org.springframework.beans.factory.xml.DefaultDocumentLoader;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
/**
* A Spring DocumentLoader that uses WoodStox when we are not validating to speed up the process.
*/
class TunedDocumentLoader extends DefaultDocumentLoader {
// DocumentBuilderFactories are somewhat expensive but not thread-safe.
// We only use this builder with WoodStox, and Fast Infoset
// and we respect Spring's desire to make new factories
// when we aren't doing the optimization.
private static DocumentBuilder documentBuilder;
static {
try {
documentBuilder =
DocumentBuilderFactory.newInstance().newDocumentBuilder();
} catch (ParserConfigurationException e) {
throw new RuntimeException(e);
}
}
private TransformerFactory transformerFactory;
private SAXParserFactory saxParserFactory;
private SAXParserFactory nsasaxParserFactory;
TunedDocumentLoader() {
transformerFactory = TransformerFactory.newInstance();
try {
Class<?> cls = Class.forName("com.ctc.wstx.sax.WstxSAXParserFactory");
saxParserFactory = (SAXParserFactory)cls.newInstance();
nsasaxParserFactory = (SAXParserFactory)cls.newInstance();
} catch (Exception e) {
//woodstox not found, use any other Stax parser
saxParserFactory = SAXParserFactory.newInstance();
nsasaxParserFactory = SAXParserFactory.newInstance();
}
try {
nsasaxParserFactory.setFeature("http://xml.org/sax/features/namespace-prefixes",
true);
} catch (Exception e) {
//ignore
}
}
@Override
public Document loadDocument(InputSource inputSource, EntityResolver entityResolver,
ErrorHandler errorHandler, int validationMode, boolean namespaceAware)
throws Exception {
if (validationMode == XmlBeanDefinitionReader.VALIDATION_NONE) {
SAXParserFactory parserFactory =
namespaceAware ? nsasaxParserFactory : saxParserFactory;
SAXParser parser = parserFactory.newSAXParser();
XMLReader reader = parser.getXMLReader();
reader.setEntityResolver(entityResolver);
reader.setErrorHandler(errorHandler);
SAXSource saxSource = new SAXSource(reader, inputSource);
Document document;
// collisions are quite unlikely here, but making documentBuilderFactory objects is expensive.
synchronized (documentBuilder) {
document = documentBuilder.newDocument();
}
DOMResult domResult = new DOMResult(document, inputSource.getSystemId());
transformerFactory.newTransformer().transform(saxSource, domResult);
return document;
} else {
return super.loadDocument(inputSource, entityResolver, errorHandler, validationMode,
namespaceAware);
}
}
@Override
protected DocumentBuilderFactory createDocumentBuilderFactory(int validationMode, boolean namespaceAware)
throws ParserConfigurationException {
DocumentBuilderFactory factory = super.createDocumentBuilderFactory(validationMode, namespaceAware);
try {
factory.setFeature("http://apache.org/xml/features/dom/defer-node-expansion", false);
} catch (ParserConfigurationException pce) {
// blank
}
return factory;
}
Document loadFastinfosetDocument(URL url)
throws IOException, ParserConfigurationException, XMLStreamException {
InputStream is = url.openStream();
InputStream in = new BufferedInputStream(is);
XMLStreamReader staxReader = new StAXDocumentParser(in);
W3CDOMStreamWriter writer = new W3CDOMStreamWriter();
StaxUtils.copy(staxReader, writer);
in.close();
return writer.getDocument();
}
}