/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xalan" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, Lotus
* Development Corporation., http://www.lotus.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xalan.trace;
import java.io.*;
import org.w3c.dom.*;
import org.w3c.dom.traversal.NodeIterator;
import org.apache.xalan.templates.ElemTemplate;
import org.apache.xalan.templates.ElemTemplateElement;
import org.apache.xalan.templates.ElemTextLiteral;
import org.apache.xalan.templates.Constants;
import org.apache.xpath.axes.ContextNodeList;
import javax.xml.transform.SourceLocator;
import org.apache.xml.dtm.DTM;
import org.apache.xml.dtm.ref.DTMNodeProxy;
/**
* <meta name="usage" content="advanced"/>
* Implementation of the TraceListener interface that
* prints each event to standard out as it occurs.
*
* @see org.apache.xalan.trace.TracerEvent
*/
public class PrintTraceListener implements TraceListener
{
/**
* Construct a trace listener.
*
* @param pw PrintWriter to use for tracing events
*/
public PrintTraceListener(java.io.PrintWriter pw)
{
m_pw = pw;
}
/**
* The print writer where the events should be written.
*/
java.io.PrintWriter m_pw;
/**
* This needs to be set to true if the listener is to print an event whenever a template is invoked.
*/
public boolean m_traceTemplates = false;
/**
* Set to true if the listener is to print events that occur as each node is 'executed' in the stylesheet.
*/
public boolean m_traceElements = false;
/**
* Set to true if the listener is to print information after each result-tree generation event.
*/
public boolean m_traceGeneration = false;
/**
* Set to true if the listener is to print information after each selection event.
*/
public boolean m_traceSelection = false;
/**
* Print information about a TracerEvent.
*
* @param ev the trace event.
*/
public void trace(TracerEvent ev)
{
switch (ev.m_styleNode.getXSLToken())
{
case Constants.ELEMNAME_TEXTLITERALRESULT :
if (m_traceElements)
{
m_pw.print(ev.m_styleNode.getSystemId()+ " Line #" + ev.m_styleNode.getLineNumber() + ", "
+ "Column #" + ev.m_styleNode.getColumnNumber() + " -- "
+ ev.m_styleNode.getNodeName() + ": ");
ElemTextLiteral etl = (ElemTextLiteral) ev.m_styleNode;
String chars = new String(etl.getChars(), 0, etl.getChars().length);
m_pw.println(" " + chars.trim());
}
break;
case Constants.ELEMNAME_TEMPLATE :
if (m_traceTemplates || m_traceElements)
{
ElemTemplate et = (ElemTemplate) ev.m_styleNode;
m_pw.print(et.getSystemId()+ " Line #" + et.getLineNumber() + ", " + "Column #"
+ et.getColumnNumber() + ": " + et.getNodeName() + " ");
if (null != et.getMatch())
{
m_pw.print("match='" + et.getMatch().getPatternString() + "' ");
}
if (null != et.getName())
{
m_pw.print("name='" + et.getName() + "' ");
}
m_pw.println();
}
break;
default :
if (m_traceElements)
{
m_pw.println(ev.m_styleNode.getSystemId()+ " Line #" + ev.m_styleNode.getLineNumber() + ", "
+ "Column #" + ev.m_styleNode.getColumnNumber() + ": "
+ ev.m_styleNode.getNodeName());
}
}
}
/**
* Method that is called just after a select attribute has been evaluated.
*
* @param ev the generate event.
*
* @throws javax.xml.transform.TransformerException
*/
public void selected(SelectionEvent ev) throws javax.xml.transform.TransformerException
{
if (m_traceSelection)
{
ElemTemplateElement ete = (ElemTemplateElement) ev.m_styleNode;
Node sourceNode = ev.m_sourceNode;
int nodeHandler = ((DTMNodeProxy)sourceNode).getDTMNodeNumber();
SourceLocator locator = ((DTMNodeProxy)sourceNode).getDTM()
.getSourceLocatorFor(nodeHandler);
if (locator != null)
m_pw.println("Selected source node '" + sourceNode.getNodeName()
+ "', at " + locator);
if (ev.m_styleNode.getLineNumber() == 0)
{
// You may not have line numbers if the selection is occuring from a
// default template.
ElemTemplateElement parent =
(ElemTemplateElement) ete.getParentElem();
if (parent == ete.getStylesheetRoot().getDefaultRootRule())
{
m_pw.print("(default root rule) ");
}
else if (parent == ete.getStylesheetRoot().getDefaultTextRule())
{
m_pw.print("(default text rule) ");
}
else if (parent == ete.getStylesheetRoot().getDefaultRule())
{
m_pw.print("(default rule) ");
}
m_pw.print(ete.getNodeName() + ", " + ev.m_attributeName + "='"
+ ev.m_xpath.getPatternString() + "': ");
}
else
{
m_pw.print(ev.m_styleNode.getSystemId()+ " Line #" + ev.m_styleNode.getLineNumber() + ", "
+ "Column #" + ev.m_styleNode.getColumnNumber() + ": "
+ ete.getNodeName() + ", " + ev.m_attributeName + "='"
+ ev.m_xpath.getPatternString() + "': ");
}
if (ev.m_selection.getType() == ev.m_selection.CLASS_NODESET)
{
m_pw.println();
org.apache.xml.dtm.DTMIterator nl = ev.m_selection.iter();
try
{
nl = nl.cloneWithReset();
}
catch(CloneNotSupportedException cnse)
{
m_pw.println(" [Can't trace nodelist because it it threw a CloneNotSupportedException]");
return;
}
int pos = nl.nextNode();
if (DTM.NULL == pos)
{
m_pw.println(" [empty node list]");
}
else
{
while (DTM.NULL != pos)
{
// m_pw.println(" " + ev.m_processor.getXPathContext().getDTM(pos).getNode(pos));
DTM dtm = ev.m_processor.getXPathContext().getDTM(pos);
m_pw.print(" ");
m_pw.print(Integer.toHexString(pos));
m_pw.print(": ");
m_pw.println(dtm.getNodeName(pos));
pos = nl.nextNode();
}
}
}
else
{
m_pw.println(ev.m_selection.str());
}
}
}
/**
* Print information about a Generate event.
*
* @param ev the trace event.
*/
public void generated(GenerateEvent ev)
{
if (m_traceGeneration)
{
switch (ev.m_eventtype)
{
case GenerateEvent.EVENTTYPE_STARTDOCUMENT :
m_pw.println("STARTDOCUMENT");
break;
case GenerateEvent.EVENTTYPE_ENDDOCUMENT :
m_pw.println("ENDDOCUMENT");
break;
case GenerateEvent.EVENTTYPE_STARTELEMENT :
m_pw.println("STARTELEMENT: " + ev.m_name);
break;
case GenerateEvent.EVENTTYPE_ENDELEMENT :
m_pw.println("ENDELEMENT: " + ev.m_name);
break;
case GenerateEvent.EVENTTYPE_CHARACTERS :
{
String chars = new String(ev.m_characters, ev.m_start, ev.m_length);
m_pw.println("CHARACTERS: " + chars);
}
break;
case GenerateEvent.EVENTTYPE_CDATA :
{
String chars = new String(ev.m_characters, ev.m_start, ev.m_length);
m_pw.println("CDATA: " + chars);
}
break;
case GenerateEvent.EVENTTYPE_COMMENT :
m_pw.println("COMMENT: " + ev.m_data);
break;
case GenerateEvent.EVENTTYPE_PI :
m_pw.println("PI: " + ev.m_name + ", " + ev.m_data);
break;
case GenerateEvent.EVENTTYPE_ENTITYREF :
m_pw.println("ENTITYREF: " + ev.m_name);
break;
case GenerateEvent.EVENTTYPE_IGNORABLEWHITESPACE :
m_pw.println("IGNORABLEWHITESPACE");
break;
}
}
}
}