The version of Apache log4j used by SoundHelix.
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XMLFileHandler.java
/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed 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.chainsaw;
import java.util.StringTokenizer;
import org.apache.log4j.Level;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* A content handler for document containing Log4J events logged using the
* XMLLayout class. It will create events and add them to a supplied model.
*
* @author <a href="mailto:oliver@puppycrawl.com">Oliver Burn</a>
* @version 1.0
*/
class XMLFileHandler
extends DefaultHandler
{
/** represents the event tag **/
private static final String TAG_EVENT = "log4j:event";
/** represents the message tag **/
private static final String TAG_MESSAGE = "log4j:message";
/** represents the ndc tag **/
private static final String TAG_NDC = "log4j:NDC";
/** represents the throwable tag **/
private static final String TAG_THROWABLE = "log4j:throwable";
/** represents the location info tag **/
private static final String TAG_LOCATION_INFO = "log4j:locationInfo";
/** where to put the events **/
private final MyTableModel mModel;
/** the number of events in the document **/
private int mNumEvents;
/** the time of the event **/
private long mTimeStamp;
/** the priority (level) of the event **/
private Level mLevel;
/** the category of the event **/
private String mCategoryName;
/** the NDC for the event **/
private String mNDC;
/** the thread for the event **/
private String mThreadName;
/** the msg for the event **/
private String mMessage;
/** the throwable details the event **/
private String[] mThrowableStrRep;
/** the location details for the event **/
private String mLocationDetails;
/** buffer for collecting text **/
private final StringBuffer mBuf = new StringBuffer();
/**
* Creates a new <code>XMLFileHandler</code> instance.
*
* @param aModel where to add the events
*/
XMLFileHandler(MyTableModel aModel) {
mModel = aModel;
}
/** @see DefaultHandler **/
public void startDocument()
throws SAXException
{
mNumEvents = 0;
}
/** @see DefaultHandler **/
public void characters(char[] aChars, int aStart, int aLength) {
mBuf.append(String.valueOf(aChars, aStart, aLength));
}
/** @see DefaultHandler **/
public void endElement(String aNamespaceURI,
String aLocalName,
String aQName)
{
if (TAG_EVENT.equals(aQName)) {
addEvent();
resetData();
} else if (TAG_NDC.equals(aQName)) {
mNDC = mBuf.toString();
} else if (TAG_MESSAGE.equals(aQName)) {
mMessage = mBuf.toString();
} else if (TAG_THROWABLE.equals(aQName)) {
final StringTokenizer st =
new StringTokenizer(mBuf.toString(), "\n\t");
mThrowableStrRep = new String[st.countTokens()];
if (mThrowableStrRep.length > 0) {
mThrowableStrRep[0] = st.nextToken();
for (int i = 1; i < mThrowableStrRep.length; i++) {
mThrowableStrRep[i] = "\t" + st.nextToken();
}
}
}
}
/** @see DefaultHandler **/
public void startElement(String aNamespaceURI,
String aLocalName,
String aQName,
Attributes aAtts)
{
mBuf.setLength(0);
if (TAG_EVENT.equals(aQName)) {
mThreadName = aAtts.getValue("thread");
mTimeStamp = Long.parseLong(aAtts.getValue("timestamp"));
mCategoryName = aAtts.getValue("logger");
mLevel = Level.toLevel(aAtts.getValue("level"));
} else if (TAG_LOCATION_INFO.equals(aQName)) {
mLocationDetails = aAtts.getValue("class") + "."
+ aAtts.getValue("method")
+ "(" + aAtts.getValue("file") + ":" + aAtts.getValue("line")
+ ")";
}
}
/** @return the number of events in the document **/
int getNumEvents() {
return mNumEvents;
}
////////////////////////////////////////////////////////////////////////////
// Private methods
////////////////////////////////////////////////////////////////////////////
/** Add an event to the model **/
private void addEvent() {
mModel.addEvent(new EventDetails(mTimeStamp,
mLevel,
mCategoryName,
mNDC,
mThreadName,
mMessage,
mThrowableStrRep,
mLocationDetails));
mNumEvents++;
}
/** Reset the data for an event **/
private void resetData() {
mTimeStamp = 0;
mLevel = null;
mCategoryName = null;
mNDC = null;
mThreadName = null;
mMessage = null;
mThrowableStrRep = null;
mLocationDetails = null;
}
}