Velocity Reviews - Computer Hardware Reviews

Velocity Reviews > Newsgroups > Programming > XML > Xerces exception with entity resolver and nested XSDs

Reply
Thread Tools

Xerces exception with entity resolver and nested XSDs

 
 
peter greaves
Guest
Posts: n/a
 
      06-25-2003
hi everyone

i am having a bad time with an entity resolver. my application uses a
resolver to locally-cache the nested schemas that the basic xsd
includes to a local directory. however i am getting an exception when
the parser tries to parse one of the included xsds which it has
downloaded, because (as far as i can tell from the stack trace) it is
trying but failing to handle other included xsds. the exception is
here:

java.lang.NullPointerException
at org.apache.xerces.validators.schema.TraverseSchema .traverseImport(TraverseSchema.java:1953)
at org.apache.xerces.validators.schema.TraverseSchema .traverseIncludedSchema(TraverseSchema.java:1227)
at org.apache.xerces.validators.schema.TraverseSchema .traverseInclude(TraverseSchema.java:1135)
<.. stuff omitted for brevity ..>

basically my xsds are all located on a remote server - i want to cache
them locally while i parse a series of docs. so i have a top level
schema which *imports *another schema with a namespace:

<xs:import namespace="http://w3.ibm.com/cc/rdf/v1"
schemaLocation="cc-rdf.xsd"/>

.... and this imported schema is downloaded. but i think the exception
occurs when the imported schema is parsed, and the parser sees this in
it:

<xs:schema targetNamespace="http://w3.ibm.com/cc/rdf/v1"
xmlns="http://w3.ibm.com/cc/rdf/v1"
xmlnss="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:include schemaLocation="cc-rdf-documentTypes.xsd"/>
<xs:include schemaLocation="cc-rdf-industryTypes.xsd"/>
<xs:include schemaLocation="cc-rdf-languageTypes.xsd"/>
<xs:include schemaLocation="cc-rdf-countriesTypes.xsd"/>
<xs:include schemaLocation="cc-rdf-geographySimpleTypes.xsd"/>
<xs:include schemaLocation="cc-rdf-productTypes.xsd"/>

the entity resolver does not resolve and locally cache these files at
all, so i am guessing that it's in parsing cc-rdf.xsd that the
exception occurs. the first of these files has this as its header

<xs:schema xmlnss="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://w3.ibm.com/cc/rdf/v1"
xmlns="http://w3.ibm.com/cc/rdf/v1" elementFormDefault="qualified"
attributeFormDefault="unqualified">

am wondering if some mismatch in namespaces is causing this but am not
sure. i can see that other included xsds are downloaded and parsed
fine. it seems that it is only the imported schema that fails. anyone
got any experience with this problem?

peter
 
Reply With Quote
 
 
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to relate a SQL based entity with an Object based entity in Entity Framework markla ASP .Net 1 10-06-2008 09:42 AM
Upgrade of Xalan 1.2.2 and Xerces 1.4.4 to Xalan 2.6 and Xerces 2.6.2 cvissy XML 0 11-16-2004 07:06 AM
Catalog / Entity resolver question Soren Kuula XML 0 05-14-2004 11:52 PM
Re: XSDs must be external...right? Steven Dilley XML 4 08-11-2003 10:42 PM
Using the Walsh Catalog Resolver with Xerces-J inside Ant? Steinar Bang XML 0 08-10-2003 06:53 PM



Advertisments