/*
* 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.log4j.xml;
import org.apache.log4j.Category;
import org.apache.log4j.Layout;
import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.helpers.OptionConverter;
import org.apache.log4j.helpers.DateLayout;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.Attributes;
import org.xml.sax.XMLReader;
import org.xml.sax.ext.LexicalHandler;
import org.xml.sax.helpers.XMLReaderFactory;
import org.xml.sax.SAXException;
import org.apache.xerces.parsers.SAXParser;
import org.apache.trax.Processor;
import org.apache.trax.TemplatesBuilder;
import org.apache.trax.Templates;
import org.apache.trax.Transformer;
import org.apache.trax.Result;
import org.apache.trax.ProcessorException;
import org.apache.trax.ProcessorFactoryException;
import org.apache.trax.TransformException;
import org.apache.serialize.SerializerFactory;
import org.apache.serialize.Serializer;
import org.apache.serialize.OutputFormat;
import org.xml.sax.helpers.AttributesImpl;
import java.io.FileOutputStream;
import java.io.IOException;
public class Transform {
public static void main(String[] args) throws Exception {
PropertyConfigurator.disableAll();
PropertyConfigurator.configure("x.lcf");
// I. Instantiate a stylesheet processor.
Processor processor = Processor.newInstance("xslt");
// II. Process the stylesheet. producing a Templates object.
// Get the XMLReader.
XMLReader reader = XMLReaderFactory.createXMLReader();
// Set the ContentHandler.
TemplatesBuilder templatesBuilder = processor.getTemplatesBuilder();
reader.setContentHandler(templatesBuilder);
// Set the ContentHandler to also function as a LexicalHandler, which
// includes "lexical" (e.g., comments and CDATA) events. The Xalan
// TemplatesBuilder -- org.apache.xalan.processor.StylesheetHandler -- is
// also a LexicalHandler).
if(templatesBuilder instanceof LexicalHandler) {
reader.setProperty("http://xml.org/sax/properties/lexical-handler",
templatesBuilder);
}
// Parse the stylesheet.
reader.parse(args[0]);
//Get the Templates object from the ContentHandler.
Templates templates = templatesBuilder.getTemplates();
// III. Use the Templates object to instantiate a Transformer.
Transformer transformer = templates.newTransformer();
// IV. Perform the transformation.
// Set up the ContentHandler for the output.
FileOutputStream fos = new FileOutputStream(args[2]);
Result result = new Result(fos);
Serializer serializer = SerializerFactory.getSerializer("xml");
serializer.setOutputStream(fos);
transformer.setContentHandler(serializer.asContentHandler());
// Set up the ContentHandler for the input.
org.xml.sax.ContentHandler chandler = transformer.getInputContentHandler();
DC dc = new DC(chandler);
reader.setContentHandler(dc);
if(chandler instanceof LexicalHandler) {
reader.setProperty("http://xml.org/sax/properties/lexical-handler",
chandler);
} else {
reader.setProperty("http://xml.org/sax/properties/lexical-handler",
null);
}
// Parse the XML input document. The input ContentHandler and
// output ContentHandler work in separate threads to optimize
// performance.
reader.parse(args[1]);
}
}
class DC implements ContentHandler {
static Category cat = Category.getInstance("DC");
ContentHandler chandler;
DC(ContentHandler chandler) {
this.chandler = chandler;
}
public
void characters(char[] ch, int start, int length)
throws org.xml.sax.SAXException {
cat.debug("characters: ["+new String(ch, start, length)+ "] called");
chandler.characters(ch, start, length);
}
public
void endDocument() throws org.xml.sax.SAXException {
cat.debug("endDocument called.");
chandler.endDocument();
}
public
void endElement(String namespaceURI, String localName, String qName)
throws org.xml.sax.SAXException {
cat.debug("endElement("+namespaceURI+", "+localName+", "+qName+") called");
chandler.endElement(namespaceURI, localName, qName);
}
public
void endPrefixMapping(String prefix) throws org.xml.sax.SAXException {
cat.debug("endPrefixMapping("+prefix+") called");
chandler.endPrefixMapping(prefix);
}
public
void ignorableWhitespace(char[] ch, int start, int length)
throws org.xml.sax.SAXException {
cat.debug("ignorableWhitespace called");
chandler.ignorableWhitespace(ch, start, length);
}
public
void processingInstruction(java.lang.String target, java.lang.String data)
throws org.xml.sax.SAXException {
cat.debug("processingInstruction called");
chandler.processingInstruction(target, data);
}
public
void setDocumentLocator(Locator locator) {
cat.debug("setDocumentLocator called");
chandler.setDocumentLocator(locator);
}
public
void skippedEntity(String name) throws org.xml.sax.SAXException {
cat.debug("skippedEntity("+name+") called");
chandler.skippedEntity(name);
}
public
void startDocument() throws org.xml.sax.SAXException {
cat.debug("startDocument called");
chandler.startDocument();
}
public
void startElement(String namespaceURI, String localName, String qName,
Attributes atts) throws org.xml.sax.SAXException {
cat.debug("startElement("+namespaceURI+", "+localName+", "+qName+")called");
if("log4j:event".equals(qName)) {
cat.debug("-------------");
if(atts instanceof org.xml.sax.helpers.AttributesImpl) {
AttributesImpl ai = (AttributesImpl) atts;
int i = atts.getIndex("timestamp");
ai.setValue(i, "hello");
}
String ts = atts.getValue("timestamp");
cat.debug("New timestamp is " + ts);
}
chandler.startElement(namespaceURI, localName, qName, atts);
}
public
void startPrefixMapping(String prefix, String uri)
throws org.xml.sax.SAXException {
cat.debug("startPrefixMapping("+prefix+", "+uri+") called");
chandler.startPrefixMapping(prefix, uri);
}
}