The reason that the entity resolver is not called is that in the case there is no xsi:schemaLocaiton in the instance, both system id and public id would be null, then most applications wouldn't know what to do with them. This is why the parser decides not to call the entity resolver.
2 ways to solve your problem: 1. Use grammar preparsing/caching. This not only solves your problem, but greatly improve the performance if the same schema is used over and over. You preparse the schema, store it in a grammar pool, and set that pool to the parser. This way, the parser knows how to find your schema. For more information, please refer to the grammar faq [1]. 2. Interact with XNI instead of SAX/DOM/JAXP. Register an XMLEntityResolver, which gets called when the parser needs a schema. It gets more information then just the system/public ids. It also gives your the namespace of the schema and why the parser needs it (referenced by the instance, imported/included by another schema document, etc.) Searching the mailing list archive for "XMLEntityResolver" would give you more detail. [1] http://xml.apache.org/xerces2-j/faq-grammars.html Hope this helps, Sandy Gao Software Developer, IBM Canada (1-905) 413-3255 [EMAIL PROTECTED] "Kumaravel" <[EMAIL PROTECTED] To: <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]> ance.com> cc: Subject: Re: EntityResolver for XSD 11/21/2002 11:47 AM Please respond to xerces-j-user Hi, Thanks for your response. I could get some information from your reply. But I need few clarification. I have to validate the attched XML against the attached XSD. The XML file come to the validator through some other application. The incoming XML look like the attached one. It does not have xsi:schemaLocation = . But, some other means, I know that the incoming XML has to be validated against the remote XSD. (attached for reference). As your suggested I attached the entity resolver with the XMLReader. When I run the program the following error is appearing. Error: General Schema Error: Grammar with uri: http://www.tibco.com/xmlns/ae2xsd/2002/05/ae/test/display , can not be found; schema namespace may be wrong: Xerces supports schemas from the "http://www.w3.org/2001/XMLSchema"; namespace or the instance document's namespace may not match the targetNamespace of the schema. The interesting part is entity resolver is not at all called to load the schema. If I add the xsi:schemaLocation in the XML, it works fine. It calls the entity resolver to resolve the schema. But my requirement is to validation with out xsi;schemaLocation. Could you please suggest anything...??? Cheers Kumaravel ----- Original Message ----- From: "Dean Des Rosiers" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 21, 2002 12:06 AM Subject: RE: EntityResolver for XSD > I've implemented a very simple EntityResolver. It pulls the xsd from an > EntityBean, if you can imagine such a thing! It's possible that this code > is no good or even dangerous. I'll leave it to the better minds on this > list to determine that. I contribute this code because I've gotten a lot of > info from this list and I'd like to "give back." > > Here's the code... > > public class DataSetSchemaResolver implements EntityResolver > { > public InputSource resolveEntity(String publicId, String systemId) > throws SAXException, IOException > { > try > { > String descriptiveId = systemId; > int dotLoc = systemId.indexOf('.'); > if (dotLoc > -1) > descriptiveId = systemId.substring(0, systemId.indexOf('.')); > > DataSetSchemaLocal schema = > (DataSetSchemaLocal)getSchemaHome ().findByDescriptiveIdLatest(descriptiveId) > ; > if (schema != null) > { > InputSource inputSource = new InputSource(new > StringReader(schema.getXmlText())); > inputSource.setPublicId(publicId); > inputSource.setSystemId(systemId); > return inputSource; > } > else > { > throw new SAXException("Couldn't find " + systemId); > } > } > catch (Exception e) > { > throw new SAXException(e); > } > > } > > > Hope this helps. > Dean > > Hi, > Can any one give some information about EntityResolver to load the XSD > from some where else. Any reference or code samples...?? > > Cheers > Kumar > > > --------------------------------------------------------------------- > 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] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] #### kumar.xml has been removed from this note on November 21 2002 by Sandy Gao #### input.xsd has been removed from this note on November 21 2002 by Sandy Gao --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
