Re: [wtp-releng] help needed on build test failures

[David Carver <dcarver@xxxxxxxxxxxxxxxx>]

Now I think we are getting to the reason for the issue.  
SAXParserFactory is the JAXP  way of creating the SaxFactory to be 
used.  However since you let JAXP determine and figure out the 
configuration and the parser to be used, you can run into configuration 
issues.  

My experience with using JAXP within OSGI based bundles is that you can 
get some unexpected results that crop up.   There are a couple of 
possible solutions.


1. Try setting the setXIncludeAware() method to either true or false to 
see if that fixes your problem.   You many need to set the other 
configuration options as well.

http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/parsers/SAXParserFactory.html


2. Call and use the Xerces specific implementations directly, and setup 
your configurations.  

I personally try to avoid using JAXP within OSGi because of the 
unpredictablility when it interacts between bundles.

It may work for a while, and then it just goes nuts one day.

Dave


karen moore wrote:
> The org.eclipse.jst.jee.util.internal.XmlRootHandler uses
>            SAXParserFactory factory = SAXParserFactory.newInstance();
>
> while the org.eclipse.core.internal.content.XmlRootHandler uses
>        Activator.getDefault().getFactory()    (our JPT copy uses this 
> as well)
>
> Will changing our JPT copy to use the former fix this problem?  And if 
> so I don't understand why the problem suddenly cropped up. I apologize 
> if I seem clueless about this, it's because I am :)
>
> Thanks,
> Karen
>
> On 6/30/2009 11:40 AM, karen moore wrote:
> > I copied XmlRootHandler from 
> > org.eclipse.core.internal.content.XmlRootHandler and that class has 
> > not changed since 2008.  Not really sure how that could have suddenly 
> > caused this problem.
> >
> > Karen
> >
> > On 6/30/2009 11:34 AM, David Carver wrote:
> > > How ever your orm content type is being set up, and where you are 
> > > getting your XML parser is causing the issue.   The WTP parser is 
> > > setup to be an XInclude aware configuration.  You can't cast between 
> > > these to configurations.
> > >
> > > I'd check to see how your SAX based parsing and content resolver are 
> > > being setup and configured when calling Xerces.  Particularly check 
> > > your createParser code.
> > >
> > > Dave
> > >
> > > karen moore wrote:
> > > > JPT has a bunch of test failures in last night's build and I am 
> > > > unsure of the cause.  We did release, but I am confused by the 
> > > > exception (see below) appearing in the log file that are preventing 
> > > > our xml content types from being loaded.  I updated my target 
> > > > workspace to last night's build and do not have test failures. Any 
> > > > ideas would be appreciated.
> > > >
> > > > Thanks,
> > > > Karen
> > > >
> > > > !MESSAGE Could not create content describer for 
> > > > org.eclipse.jpt.core.content.orm. Content type has been disabled.
> > > > !STACK 0
> > > > java.lang.ClassCastException: 
> > > > org.apache.xerces.parsers.XIncludeAwareParserConfiguration 
> > > > incompatible with org.apache.xerces.xni.parser.XMLParserConfiguration
> > > >     at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
> > > >     at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
> > > >     at 
> > > > org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.<init>(Unknown 
> > > > Source)
> > > >     at org.apache.xerces.jaxp.SAXParserImpl.<init>(Unknown Source)
> > > >     at 
> > > > org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown 
> > > > Source)
> > > >     at 
> > > > org.eclipse.jpt.core.internal.resource.xml.XMLRootHandler.createParser(XMLRootHandler.java:118) 
> > > >
> > > >     at 
> > > > org.eclipse.jpt.core.internal.resource.xml.XMLRootHandler.parseContents(XMLRootHandler.java:186) 
> > > >
> > > >     at 
> > > > org.eclipse.jpt.core.internal.resource.xml.XMLRootElementContentDescriber.checkCriteria(XMLRootElementContentDescriber.java:169) 
> > > >
> > > >     at 
> > > > org.eclipse.jpt.core.internal.resource.xml.XMLRootElementContentDescriber.describe(XMLRootElementContentDescriber.java:204) 
> > > >
> > > >     at 
> > > > org.eclipse.core.internal.content.ContentType.describe(ContentType.java:161) 
> > > >
> > > >     at 
> > > > org.eclipse.core.internal.content.ContentTypeCatalog.collectMatchingByContents(ContentTypeCatalog.java:189) 
> > > >
> > > >
> > > >
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