Thanks. The code is very similar to mine. Have you tried to parse an
instance document referencing a schema other than those you precompile?
In my case, unless my XMLEntityResolver throws the XNIException instead of
returning null, the refernced schema appears to be loaded, despite the
grammar pool being locked! I know it is loaded because I changed the
instance document to be incorrect WRT its schema, and the parser threw the
exception.
-a
> Hi ,
>
> This may not solve your problem or answer your questions , but
> attached is a small program which i was working on , see if it is of
> any help.
>
> Regards
> venu
>
>
> [EMAIL PROTECTED] wrote:
>
>>Hi,
>>
>>Perhaps this issue has been discussed on the list but the archives
>>aren't available, so I have to post. Here goes...
>>
>>I am trying to use what is called 'active' schema caching, as
>>demonstrated by the XMLGrammarBuilder example, except, I want to use
>>DOMParser and use the DOM of the XML instances that are successfully
>>validated. This the code I'm using
>>
>> SymbolTable symtab = new SymbolTable();
>> XMLGrammarPreparser preparser = new
>> XMLGrammarPreparser(symtab);
>> XMLGrammarPoolImpl pool = new XMLGrammarPoolImpl();
>>
>> preparser.registerPreparser(XMLGrammarDescription.XML_SCHEMA,
>> null);
>> preparser.setProperty(GRAMMAR_POOL, pool);
>> preparser.setFeature(NAMESPACES_FEATURE_ID, true);
>> preparser.setFeature(VALIDATION_FEATURE_ID, true);
>> preparser.setFeature(SCHEMA_VALIDATION_FEATURE_ID, true);
>> preparser.setFeature(SCHEMA_FULL_CHECKING_FEATURE_ID, true);
>> preparser.setErrorHandler(this);
>>
>> System.out.println("Pre-compiling Schema from file " + xsd);
>> Grammar g =
>> preparser.preparseGrammar(XMLGrammarDescription.XML_SCHEMA, new
>>XMLInputSource(null, xsd, null));
>> pool.lockPool();
>>
>> XMLParserConfiguration parsercfg = new
>> StandardParserConfiguration(symtab,
>>pool);
>> parsercfg.setFeature(NAMESPACES_FEATURE_ID, true);
>> parsercfg.setFeature(VALIDATION_FEATURE_ID, true);
>> parsercfg.setFeature(SCHEMA_VALIDATION_FEATURE_ID, true);
>> parsercfg.setFeature(SCHEMA_FULL_CHECKING_FEATURE_ID, true);
>> parsercfg.setEntityResolver(new XMLEntityResolver() {
>> public XMLInputSource
>>resolveEntity(XMLResourceIdentifier id) throws XNIException {
>> System.out.println("Resolving
>> resource: " +
>> id.getLiteralSystemId());
>> throw new
>> XNIException("Not resolving
>> entity..."); //return null;
>> }
>> });
>>
>>First question is about the XMLEntityResolver. The FAQ instructs to
>>register a "do-nothing" EntityResolver. What does it mean? If I simply
>>return null (do nothing?) the XML instance document that should fail
>>validation quietly validates. Does it mean I should throw exception, as
>>I do? That seems to work but is it "do-nothing"?
>>
>>More importantly, since not only need to validate XML but also get DOMs
>>of the valid ones, I followed the FAQ again and registered the
>>DOMParser:
>>
>> parser = new DOMParser(parsercfg);
>> parsercfg.setDocumentHandler(parser);
>>
>> ....
>> // f is File
>> XMLInputSource xis = new XMLInputSource(null, f.getName(), null);
>> System.out.println("Parsing instance XML in file " + f.getName() +
>> " "
>>+ xis.getSystemId());
>>
>> parsercfg.parse(xis);
>>
>>
>>But doe not work at all! I get a NullPointerException and the
>>XMLEntityResolver isn't called at all:
>>
>>
>> Pre-compiling Schema from file 2.xsd
>> Parsing instance XML in file 2.xml 2.xml
>> java.lang.NullPointerException
>> at
>> org.apache.xerces.parsers.AbstractDOMParser.startDocument(Unknown
>>Source)
>> at
>> org.apache.xerces.impl.xs.XMLSchemaValidator.startDocument(Unknown
>>Source)
>> at org.apache.xerces.impl.XMLNamespaceBinder.startDocument(Unknown
>> Source) at
>> org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown
>> Source) at
>> org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown
>>Source)
>> at org.apache.xerces.impl.XMLEntityManager.startEntity(Unknown
>> Source) at
>> org.apache.xerces.impl.XMLEntityManager.startDocumentEntity(Unknown
>>Source)
>> at
>> org.apache.xerces.impl.XMLDocumentScannerImpl.setInputSource(Unknown
>>Source)
>> at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown
>> Source) [java] at
>> org.apache.xerces.parsers.DTDConfiguration.parse(Unknown
>>Source)
>> at
>> gov.treas.fms.sps.utils.SchemaVerifier.parse(SchemaVerifier.java:189)
>> at
>> gov.treas.fms.sps.utils.SchemaVerifier.parse(SchemaVerifier.java:199)
>>] at
>>gov.treas.fms.sps.utils.SchemaVerifier.parse(SchemaVerifier.java:207)
>> at
>>gov.treas.fms.sps.utils.SchemaVerifier.main(SchemaVerifier.java:337)
>>
>>
>>I tried to test the entity resolver of the DOMParser but it isn't
>>called either: parser.setEntityResolver(new EntityResolver() {
>> public InputSource resolveEntity(String
>> pubid,
>>String sysid) throws SAXException, IOException {
>> System.out.println("DOM parser entity
>> resolver: pub id " +
>>pubid + ", sysid: " + sysid);
>> return null;
>> }
>> });
>>
>>So, can somebody explain me what am I doing something wrong? And what
>>should I be doing to get what I want. Almost forgot, I'm using Xerces
>>2.2.1 and changing parser with my client is very-very-very difficult -
>>government agency.
>>Please. lend a helping hand. TIA,
>>
>>Regards,
>>
>>-a
>>
>>
>>
>>
>>
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