handling of unresolved grammar in preparsing 2004-04-24 - By Jeff Greif
In preparsing this schema which contains an unresolvable namespace
<schema xmlns:bogus="http://hyperspace/"
xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://example.com/ns">
<complexType name="RootType">
<sequence>
<element name="ok" type="string"/>
<element name="bad" type="bogus:Random"/>
</sequence>
</complexType>
</schema>
using Xerces 2.2.1 (I know, there is a later, better version), I get behavior
that is not what I want when I supply an entity resolver to the preparser. If
the entity resolver returns null, a non-null grammar is returned from the
preparse, and when I create an XSModel from that grammar, there is an anyType
node in place of the type that cannot be resolved. What I want is to have an
exception thrown, or better, a null grammar returned. Is there a feature or
property that can be set on the preparser to achieve this? If not in 2.2.1, is
there such a feature or property in later versions of Xerces?
Note that in xerces 2.2.1, I can get the desired behavior by supplying no
entity resolver. In that case, XmlSchemaLoader.resolveDocument() throws a
NullPointerException, which would probably be considered a bug, but for me, it
's a feature!
Jeff
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<DIV><FONT face=Verdana size=2>In preparsing this schema which contains an
unresolvable namespace</FONT></DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV>
<DIV><FONT face=Verdana size=2><schema xmlns:bogus="<A
href="http://hyperspace/">http://hyperspace/</A>"</FONT></DIV>
<DIV><FONT face=Verdana
size=2>
xmlns="http://www.w3.org/2001/XMLSchema"</FONT></DIV>
<DIV><FONT face=Verdana
size=2>
targetNamespace="http://example.com/ns"></FONT></DIV>
<DIV><FONT face=Verdana size=2> <complexType
name="RootType"></FONT></DIV>
<DIV><FONT face=Verdana size=2>
<sequence></FONT></DIV>
<DIV><FONT face=Verdana size=2>
<element name="ok" type="string"/></FONT></DIV>
<DIV><FONT face=Verdana size=2>
<element name="bad" type="bogus:Random"/></FONT></DIV>
<DIV><FONT face=Verdana size=2> </sequence></FONT></DIV>
<DIV><FONT face=Verdana size=2> </complexType></FONT></DIV>
<DIV><FONT face=Verdana size=2></schema></FONT></DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV>
<DIV><FONT face=Verdana size=2>using Xerces 2.2.1 (I know, there is a later,
better version), I get behavior that is not what I want when I supply an entity
resolver to the preparser. If the entity resolver returns null, a non
-null
grammar is returned from the preparse, and when I create an XSModel from that
grammar, there is an anyType node in place of the type that cannot be
resolved. What I want is to have an exception thrown, or better, a null
grammar returned. Is there a feature or property that can be set on the
preparser to achieve this? If not in 2.2.1, is there such a feature or
property in later versions of Xerces?</FONT></DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV>
<DIV><FONT face=Verdana size=2>Note that in xerces 2.2.1, I can get the desired
behavior by supplying no entity resolver. In that case,
XmlSchemaLoader.resolveDocument() throws a NullPointerException, which would
probably be considered a bug, but for me, it's a feature!</FONT></DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV>
<DIV><FONT face=Verdana size=2>Jeff</FONT></DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV></BODY></HTML>
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