/*
* Copyright 1999-2004 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.
*/
/*
* $Id: PrintTraceListener.java,v 1.21 2004/02/16 23:00:27 minchau Exp $
*/
package org.apache.xalan.trace;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import javax.xml.transform.SourceLocator;
import org.apache.xalan.templates.Constants;
import org.apache.xalan.templates.ElemTemplate;
import org.apache.xalan.templates.ElemTemplateElement;
import org.apache.xalan.templates.ElemTextLiteral;
import org.apache.xml.dtm.DTM;
import org.apache.xml.dtm.ref.DTMNodeProxy;
import org.apache.xml.serializer.SerializerTrace;
import org.w3c.dom.Node;
/**
* Implementation of the TraceListener interface that
* prints each event to standard out as it occurs.
*
* @see org.apache.xalan.trace.TracerEvent
* @xsl.usage advanced
*/
public class PrintTraceListener implements TraceListenerEx3
{
/**
* 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;
/**
* Set to true if the listener is to print information after each extension event.
*/
public boolean m_traceExtension = 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());
}
}
}
int m_indent = 0;
/**
* Print information about a TracerEvent.
*
* @param ev the trace event.
*/
public void trace(TracerEvent ev)
{
// m_traceElements = true;
// m_traceTemplates = true;
//
// for(int i = 0; i < m_indent; i++)
// m_pw.print(" ");
// m_indent = m_indent+2;
// m_pw.print("trace: ");
_trace(ev);
}
/**
* Method that is called when the end of a trace event occurs.
* The method is blocking. It must return before processing continues.
*
* @param ev the trace event.
*/
public void traceEnd(TracerEvent ev)
{
// m_traceElements = true;
// m_traceTemplates = true;
//
// m_indent = m_indent-2;
// for(int i = 0; i < m_indent; i++)
// m_pw.print(" ");
// m_pw.print("etrac: ");
// _trace(ev);
}
/**
* 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;
SourceLocator locator = null;
if (sourceNode instanceof DTMNodeProxy) {
int nodeHandler = ((DTMNodeProxy) sourceNode).getDTMNodeNumber();
locator =
((DTMNodeProxy) sourceNode).getDTM().getSourceLocatorFor(
nodeHandler);
}
if (locator != null)
m_pw.println(
"Selected source node '"
+ sourceNode.getNodeName()
+ "', at "
+ locator);
else
m_pw.println(
"Selected source node '" + sourceNode.getNodeName() + "'");
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();
// The following lines are added to fix bug#16222.
// The main cause is that the following loop change the state of iterator, which is shared
// with the transformer. The fix is that we record the initial state before looping, then
// restore the state when we finish it, which is done in the following lines added.
int currentPos = DTM.NULL;
currentPos = nl.getCurrentPos();
nl.setShouldCacheNodes(true); // This MUST be done before we clone the iterator!
org.apache.xml.dtm.DTMIterator clone = null;
// End of block
try {
clone = nl.cloneWithReset();
} catch (CloneNotSupportedException cnse) {
m_pw.println(
" [Can't trace nodelist because it it threw a CloneNotSupportedException]");
return;
}
int pos = clone.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 = clone.nextNode();
}
}
// Restore the initial state of the iterator, part of fix for bug#16222.
nl.runTo(-1);
nl.setCurrentPos(currentPos);
// End of fix for bug#16222
} else {
m_pw.println(ev.m_selection.str());
}
}
}
/**
* Method that is called after an xsl:apply-templates or xsl:for-each
* selection occurs.
*
* @param ev the generate event.
*
* @throws javax.xml.transform.TransformerException
*/
public void selectEnd(EndSelectionEvent ev)
throws javax.xml.transform.TransformerException
{
// Nothing for right now.
}
/**
* Print information about a Generate event.
*
* @param ev the trace event.
*/
public void generated(GenerateEvent ev)
{
if (m_traceGeneration)
{
switch (ev.m_eventtype)
{
case SerializerTrace.EVENTTYPE_STARTDOCUMENT :
m_pw.println("STARTDOCUMENT");
break;
case SerializerTrace.EVENTTYPE_ENDDOCUMENT :
m_pw.println("ENDDOCUMENT");
break;
case SerializerTrace.EVENTTYPE_STARTELEMENT :
m_pw.println("STARTELEMENT: " + ev.m_name);
break;
case SerializerTrace.EVENTTYPE_ENDELEMENT :
m_pw.println("ENDELEMENT: " + ev.m_name);
break;
case SerializerTrace.EVENTTYPE_CHARACTERS :
{
String chars = new String(ev.m_characters, ev.m_start, ev.m_length);
m_pw.println("CHARACTERS: " + chars);
}
break;
case SerializerTrace.EVENTTYPE_CDATA :
{
String chars = new String(ev.m_characters, ev.m_start, ev.m_length);
m_pw.println("CDATA: " + chars);
}
break;
case SerializerTrace.EVENTTYPE_COMMENT :
m_pw.println("COMMENT: " + ev.m_data);
break;
case SerializerTrace.EVENTTYPE_PI :
m_pw.println("PI: " + ev.m_name + ", " + ev.m_data);
break;
case SerializerTrace.EVENTTYPE_ENTITYREF :
m_pw.println("ENTITYREF: " + ev.m_name);
break;
case SerializerTrace.EVENTTYPE_IGNORABLEWHITESPACE :
m_pw.println("IGNORABLEWHITESPACE");
break;
}
}
}
/**
* Print information about an extension event.
*
* @param ev the extension event to print information about
*/
public void extension(ExtensionEvent ev) {
if (m_traceExtension) {
switch (ev.m_callType) {
case ExtensionEvent.DEFAULT_CONSTRUCTOR:
m_pw.println("EXTENSION: " + ((Class)ev.m_method).getName() + "#<init>");
break;
case ExtensionEvent.METHOD:
m_pw.println("EXTENSION: " + ((Method)ev.m_method).getDeclaringClass().getName() + "#" + ((Method)ev.m_method).getName());
break;
case ExtensionEvent.CONSTRUCTOR:
m_pw.println("EXTENSION: " + ((Constructor)ev.m_method).getDeclaringClass().getName() + "#<init>");
break;
}
}
}
/**
* Print information about an extension event.
*
* @param ev the extension event to print information about
*/
public void extensionEnd(ExtensionEvent ev) {
// do nothing
}
}