 | | RE: (BUG?) org.apache.xpath.compiler.XPathParser.initXPath() goin
g in to inf | RE: (BUG?) org.apache.xpath.compiler.XPathParser.initXPath() goin
g in to inf 2003-03-13 - By Tim Cronin
by making my errorlistener.fatalerror()
throw the transformerException when done processing it
the infinite loop goes away.
when validating using org.apache.xalan.xsltc.trax.TransformerFactoryImpl
to create the transformer I did not have to rethrow the exception.
-----Original Message-----
From: Tim Cronin [mailto:tim@(protected)]
Sent: Thursday, March 13, 2003 12:20 PM
To: xalan-j-users@(protected)
Subject: RE: (BUG?) org.apache.xpath.compiler.XPathParser.initXPath() goin g
in to infinite loop
this comment was right above the code...
// Patch for Christine's gripe. She wants her errorHandler to return from
// a fatal error and continue trying to parse, rather than throwing an
exception.
// Without the patch, that put us into an endless loop.
//
// %REVIEW% Is there a better way of doing this?
// %REVIEW% Are there any other cases which need the safety net?
// (and if so do we care right now, or should we rewrite the XPath
// grammar engine and can fix it at that time?)
with
org.apache.xalan.xsltc.trax.TransformerFactoryImpl
you catch all the errors but it still throws the exception.
-----Original Message-----
From: Tim Cronin [mailto:tim@(protected)]
Sent: Thursday, March 13, 2003 12:13 PM
To: xalan-j-users@(protected)
Subject: (BUG?) org.apache.xpath.compiler.XPathParser.initXPath() going in
to infinite loop
I'm running a transformation against an xsl stylesheet
I've
I get Stack overflow exception and it spins through the following
org.apache.xpath.compiler.XPathParser.initXPath(XPathParser.java:191)
I believe this section of code is the culprit (note the comment...)
catch (org.apache.xpath.XPathProcessorException e)
{
if(CONTINUE_AFTER_FATAL_ERROR.equals(e.getMessage()))
{
// What I _want_ to do is null out this XPath.
// I doubt this has the desired effect, but I'm not sure what else to do.
// %REVIEW%!!!
initXPath(compiler, "/..", namespaceContext);
}
else
throw e;
}
heres the stylesheet (it's invalid I'm trying to catch the errors
<xsl:stylesheet version="1.0" xmlns:xsl="
http://www.w3.org/1999/XSL/Transform <http://www.w3.org/1999/XSL/Transform>
">
<xsl:template match="/">
<div>
<xsl:value-of select="/Properties/Group[@(protected)=Table
Heading']/Datum[@(protected)='Title']"/>
hello world...
</div>
</xsl:template>
</xsl:stylesheet>
here's my calling code (ValidationHandler implements
javax.xml.transform.ErrorListener)
public static ValidationHandler validate(String xsl)
{
ValidationHandler vh = new ValidationHandler();
try
{
// NOTE: strong tie to
org.apache.xalan.processor.TransformerFactoryImpl
// if xsl processors change then Need to force this to be able to set
line number attribs...
TransformerFactory tf = (TransformerFactory) new
org.apache.xalan.processor.TransformerFactoryImpl();
tf.setAttribute(org.apache.xalan.processor.TransformerFactoryImpl.FEATURE_SO
URCE_LOCATION, Boolean.TRUE);
tf.setErrorListener(vh);
tf.setURIResolver(new Resolver());
XMLReader xr = XMLReaderFactory.createXMLReader();
xr.setEntityResolver(new Resolver());
Transformer transformer = tf.newTransformer(new SAXSource(xr, new
InputSource(new StringReader(xsl))));
}
catch (SAXException e)
{
DOMException de = new DOMException(DOMException.SYNTAX_ERR,
"cannot validate Stylesheet");
de.initCause(e);
throw de;
}
catch (TransformerException e)
{
vh.error(e);
}
return vh;
}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<TITLE>RE: small program on converting html/xhtml to xsl:fo needed</TITLE>
<META content="MSHTML 6.00.2800.1141" name=GENERATOR></HEAD>
<BODY>
<DIV><SPAN class=523403618-13032003><FONT face=Arial color=#0000ff size=2>by
making my errorlistener.fatalerror()</FONT></SPAN></DIV>
<DIV><SPAN class=523403618-13032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=523403618-13032003><FONT face=Arial color=#0000ff size=2>throw
the transformerException when done processing it</FONT></SPAN></DIV>
<DIV><SPAN class=523403618-13032003><FONT face=Arial color=#0000ff size=2>the
infinite loop goes away.</FONT></SPAN></DIV>
<DIV><SPAN class=523403618-13032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=523403618-13032003><FONT face=Arial color=#0000ff size=2>when
validating using
org.apache.xalan.xsltc.trax.TransformerFactoryImpl</FONT></SPAN></DIV>
<DIV><SPAN class=523403618-13032003><FONT face=Arial color=#0000ff size=2>to
create the transformer I did not have to rethrow the
exception.</FONT></SPAN></DIV>
<DIV><SPAN class=523403618-13032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=523403618-13032003></SPAN><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Tim Cronin
[mailto:tim@(protected)]<BR><B>Sent:</B> Thursday, March 13, 2003 12:20
PM<BR><B>To:</B> xalan-j-users@(protected)<BR><B>Subject:</B> RE: (BUG?)
org.apache.xpath.compiler.XPathParser.initXPath() goin g in to infinite
loop<BR><BR></DIV></FONT>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=767182218-13032003
>this
comment was right above the code...</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=767182218-13032003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=767182218-13032003> // Patch for Christine's gripe. She wants her
errorHandler to return from<BR> // a fatal error and continue trying to
parse, rather than throwing an exception.<BR> // Without the patch, that
put us into an endless loop.<BR> //<BR> // %REVIEW% Is there a
better way of doing this?<BR> // %REVIEW% Are there any other cases
which
need the safety net?<BR> // (and if so do we care right now, or
should we rewrite the XPath<BR> // grammar engine and can fix it at
that time?)<BR></SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=767182218-13032003>with</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=767182218-13032003>org.apache.xalan.xsltc.trax.TransformerFactoryImpl<
/SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=767182218-13032003>you
catch all the errors but it still throws the exception.</SPAN></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Tim Cronin
[mailto:tim@(protected)]<BR><B>Sent:</B> Thursday, March 13, 2003 12:13
PM<BR><B>To:</B> xalan-j-users@(protected)<BR><B>Subject:</B> (BUG?)
org.apache.xpath.compiler.XPathParser.initXPath() going in to infinite
loop<BR><BR></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=657010818-13032003>I'm running a transformation against an xsl
stylesheet</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=657010818-13032003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=657010818-13032003>I've</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=657010818-13032003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=657010818-13032003>I</SPAN></FONT><FONT face=Arial color=#0000ff
size=2><SPAN class=657010818-13032003> get Stack overflow exception
and
it spins through the following</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff
size=2>org.apache.xpath.compiler.XPathParser.initXPath(XPathParser.java:191
)</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff size=2>I
believe this section of code is the culprit (note the
comment...)</FONT></SPAN></DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2> catch (org.apache.xpath.XPathProcessorException
e)<BR> {<BR>
if(CONTINUE_AFTER_FATAL_ERROR.equals(e.getMessage()))<BR>
{<BR> // What I _want_ to do is null out this
XPath.<BR> // I doubt this has the desired effect, but I'm not
sure what else to do.<BR> //
%REVIEW%!!!<BR> initXPath(compiler, "/..",
namespaceContext);<BR> }<BR>
else<BR> throw e;<BR> }</FONT></SPAN></DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2>heres the stylesheet (it's invalid I'm trying to catch the
errors</FONT></SPAN></DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2><xsl:stylesheet version="1.0" xmlns:xsl="<A
href="http://www.w3.org/1999/XSL/Transform">http://www.w3.org/1999/XSL
/Transform</A>"><BR>
<xsl:template match="/"><BR>
<div><BR> <xsl:value-of
select="/Properties/Group[@(protected)=Table
Heading']/Datum[@(protected)='Title']"/><BR>hello world...<BR>  
;
</div><BR>
</xsl:template><BR></xsl:stylesheet></FONT></SPAN></DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2>here's my calling code (ValidationHandler implements
javax.xml.transform.ErrorListener)</FONT></SPAN></DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2> public static ValidationHandler validate(String xsl)<BR> 
;
{<BR> ValidationHandler vh = new
ValidationHandler();</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2> try<BR>
{<BR> // NOTE: strong tie to
org.apache.xalan.processor.TransformerFactoryImpl<BR>
// if xsl processors change then Need to force this to be able to set line
number attribs...<BR> TransformerFactory tf =
(TransformerFactory) new
org.apache.xalan.processor.TransformerFactoryImpl();</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2>
tf.setAttribute(org.apache.xalan.processor.TransformerFactoryImpl.FEATURE
_SOURCE_LOCATION,
Boolean.TRUE);<BR>
tf.setErrorListener(vh);<BR>
tf.setURIResolver(new Resolver());</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2> XMLReader xr =
XMLReaderFactory.createXMLReader();<BR>
xr.setEntityResolver(new Resolver());</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=657010818-13032003><FONT face=Arial color=#0000ff
size=2> Transformer transformer =
tf.newTransformer(new SAXSource(xr, new InputSource(new
StringReader(xsl))));<BR> }<BR> catch
(SAXException e)<BR> {<BR>
DOMException de = new
DOMException(DOMException.SYNTAX_ERR,<BR>
"cannot validate Stylesheet");<BR>
de.initCause(e);<BR> throw
de;<BR> }<BR> catch
(TransformerException e)<BR>
{<BR> vh.error(e);<BR>
}<BR> return vh;<BR>
}<BR></FONT></SPAN></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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