Hi Dave, I'm guessing both schema1.xsd and schema2.xsd have the same target namespace. The default XMLGrammarPool implementation (XMLGrammarPoolImpl) caches one XSGrammar per namespace so will always return the XSGrammar built for the first schema. An XMLGrammarPool doesn't have to work like that. You could do something clever like merging XSGrammars or caching based on the target namespace and schema location. For examples of those see org.apache.xerces.impl.xs.XSLoaderImpl.XSGrammarMerger [1] and org.apache.xerces.jaxp.validation.SoftReferenceGrammarPool [2].
Thanks. [1] http://svn.apache.org/viewvc/xerces/java/trunk/src/org/apache/xerces/impl/xs/XSLoaderImpl.java?revision=406145&view=markup [2] http://svn.apache.org/viewvc/xerces/java/trunk/src/org/apache/xerces/jaxp/validation/SoftReferenceGrammarPool.java?revision=447235&view=markup Michael Glavassevich XML Parser Development IBM Toronto Lab E-mail: [EMAIL PROTECTED] E-mail: [EMAIL PROTECTED] [EMAIL PROTECTED] wrote on 06/21/2007 10:38:42 AM: > Hi there, > > I'm working on some code that adds a set of schemas to an XMLGrammarPool > and then lock the pool. When an XML document is received it will attempt > to validate the XML using the corresponding schema from the pool. I'm > having some trouble implementing this which has lead me to the following - > > I've noticed something strange with the XMLGrammarPreparser. Basically I > call preparseGrammar() for schema1.xsd and print out the grammar > description of the grammar that is returned. Then I call preparseGrammar() > for schema2.xsd and print out the grammar description of the grammar that > is returned. It appears that the same object is returned from both. Maybe > I'm missing something here but I would have expected these descriptions > would not be the same. > > I've been able to reproduce this using the XMLGrammarBuilder example. Just > add a System.out after the call to preparseGrammar() on line 253. Here is > the output I get when running this - > > >java -classpath .;../../resourcestore/jars/xercesimpl.jar > xni.XMLGrammarBuilder -a c:\workspace\schema1.xsd > c:\workspace\schema2.xsd > > :c:\workspace\schema1.xsd::: > :c:\workspace\schema1.xsd::: > > > > Can someone explain to me why this happens? I've spent most of the day > looking at it but I can't explain what is happening. > > Thanks, > Dave. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
