Hi all, I could solve this problem. I had not made some entries in the file, XSAttributeChecker.java (for, allocation of memory for the attributes) which was causing this problem.
Now the code I have written can recognize, 0-n xs:assert children of <xs:complexType> (as per the grammar specified in the spec) and I am getting error messages in case of wrong syntax. I am happy to say, a good framework for assertions support is done from my end. I have modified / created the following files, package org.apache.xerces.impl.xs -> SchemaGrammar.java -> SchemaSymbols.java -> XSComplexTypeDecl.java package org.apache.xerces.xs -> XSAssert.java (new, interface) -> XSConstants.java package org.apache.xerces.impl.xs.assertion (new, package) -> Test.java (representing, "test" attribute) -> XSAssertImpl.java package org.apache.xerces.impl.xs.traversers -> XSAttributeChecker.java -> XSDComplexTypeTraverser.java I would really like the Xerces team to review my work at this stage, so you could validate that I am on the right path, and suggest future directions. How could I submit the above files, for getting them reviewed by the Xerces team? Some further work I see that still need to be done for xs:assert support is, 1) Correcting few error messages, to reflect the correct context. 2) Handling some Java level exception traces to proper Xerces exceptions. 3) Testing xs:assert on <xs:restriction and <xs:extension. I have presently tested asserts as direct children of xs:complexType. 4) XPath 2.0 processing (which is an open issue at the moment). Waiting for reply from the team ... On 7/26/08, Mukul Gandhi <[EMAIL PROTECTED]> wrote: > Hi all, > I am implementing assertions support in Xerces, as per the XML > Schema 1.1 spec. I have written quite a bit of code upto now for this. > > As guided by the XML Schema 1.1 language, I have modified the file, > XSDComplexTypeTraverser.java of Xerces. > > I have added a method, > private void traverseAssertions(Element assertElement, > XSDocumentInfo schemaDoc, SchemaGrammar grammar) > throws ComplexTypeRecoverableError > > in XSDComplexTypeTraverser.java > > I have done some testing. There are no compilation errors in the > Xerces code base after I have made the changes, and I am able to > export a JAR (something, like xercesImpl.jar) which I am able to test. > > For testing, when I add, <xs:assert test="abc" /> as a child of, > <xs:complexType> in a sample document, and run the new Xerces code I > have written, the execution does go into the method, > traverseAssertions (which I have been able to accomplish). > > At the beginning of this method, I have written a code like (copied > from Xerces itself), > > Object[] attrValues = fAttrChecker.checkAttributes(assertElement, > false, schemaDoc); > String test = (String) attrValues[XSAttributeChecker.ATTIDX_XPATH]; //XX > > This will retrieve the attribute values of xs:assert element. > > But I am getting null pointer exception at, line XX. The object > attrValues is coming as null. And the execution halts after this. > > I have been debugging (the cause of null pointer exception) since past > few hours for this, but not been able to find the solution. > > Can somebody please help, so I could proceed further with implementation. > > I am really hoping I can complete assertions support (without, XPath > processing for now) quite soon. -- Regards, Mukul Gandhi --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
