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https://issues.apache.org/jira/browse/XERCESJ-1583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13447508#comment-13447508
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Michael Glavassevich commented on XERCESJ-1583:
-----------------------------------------------
Mukul, the problem is that Xerces is throwing an NPE in XSD 1.0 mode. This is
an invalid XSD 1.0 schema document. We should report an error, but Xerces
shouldn't throw an NPE.
Looking at the code I can see that this is another place where we're missing an
explicit check against XSDHandler.fSchemaVersion.
> NullPointerException when parsing an instance that has a schema with
> inheritable attribute
> ------------------------------------------------------------------------------------------
>
> Key: XERCESJ-1583
> URL: https://issues.apache.org/jira/browse/XERCESJ-1583
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema 1.0 Structures, XML Schema 1.1 Structures
> Affects Versions: 2.11.0
> Reporter: Octavian Nadolu
>
> If I parse the instance.xml file using the following java code, I get an
> NullPointerException. I tested on the xml-schema-1.1-dev branch.
> -----------Java code-----------------------
> XMLReader parser = new org.apache.xerces.parsers.SAXParser();
> parser.setFeature(Constants.XERCES_FEATURE_PREFIX +
> Constants.SCHEMA_VALIDATION_FEATURE, true);
> parser.parse("file:/C:/instance.xml");
> --------------------------------------
> -----------------instance.xml-------------------
> <BookStore xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:noNamespaceSchemaLocation="schema.xsd">
> </BookStore>
> -------------------------------------------------------
> ---------------------schema.xsd-----------------
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";>
> <xs:element name="BookStore">
> <xs:complexType>
> <xs:attribute name="lang" inheritable="true" type="xs:string"/>
> </xs:complexType>
> </xs:element>
> </xs:schema>
> --------------------------------------------------------
> -----------NullPointerException -------------------------------
> Exception in thread "main" java.lang.NullPointerException
> at
> org.apache.xerces.impl.xs.traversers.XSDAttributeTraverser.traverseLocal(XSDAttributeTraverser.java:144)
> at
> org.apache.xerces.impl.xs.traversers.XSDAbstractTraverser.traverseAttrsAndAttrGrps(XSDAbstractTraverser.java:796)
> at
> org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.processComplexContent(XSDComplexTypeTraverser.java:1639)
> at
> org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.traverseComplexTypeDecl(XSDComplexTypeTraverser.java:485)
> at
> org.apache.xerces.impl.xs.traversers.XSDComplexTypeTraverser.traverseLocal(XSDComplexTypeTraverser.java:181)
> at
> org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElement(XSDElementTraverser.java:393)
> at
> org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseGlobal(XSDElementTraverser.java:241)
> at
> org.apache.xerces.impl.xs.traversers.XSDHandler.traverseSchemas(XSDHandler.java:1629)
> at
> org.apache.xerces.impl.xs.traversers.XSDHandler.parseSchema(XSDHandler.java:724)
> at
> org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(XMLSchemaLoader.java:644)
> at
> org.apache.xerces.impl.xs.XMLSchemaValidator.findSchemaGrammar(XMLSchemaValidator.java:3072)
> at
> org.apache.xerces.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:2259)
> at
> org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:859)
> at
> org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:283)
> at
> org.apache.xerces.impl.XMLNSDocumentScannerImpl$NSContentDispatcher.scanRootElementHook(XMLNSDocumentScannerImpl.java:733)
> at
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1754)
> at
> org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:324)
> at
> org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:890)
> at
> org.apache.xerces.parsers.XML11Configuration.parse(XML11Configuration.java:813)
> at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:108)
> at
> org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1129)
> at XercesParse.main(XercesParse.java:70)
> ---------------------------------------------------------------------------
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