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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=20908 NullPointerException when sorting using a child of a variable. Summary: NullPointerException when sorting using a child of a variable. Product: XalanJ2 Version: 2.5 Platform: Other OS/Version: Other Status: NEW Severity: Normal Priority: Other Component: Xalan AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] It would seem that xalan 2.5.1 doesn't like doing anything of the form: <xsl:apply-templates select="people"> <xsl:sort select="$request/parameter=name"/> </xsl:apply-templates> ie. sorting a set of elements based on whether one of their children coincides with a child of a variable. Previous versions of xalan (2.4.1 and 2.1.0 are the only two I've tried) have allowed this. It seems the easiest way to work around this is to reference the element represented by the variable absolutely, ie in the example below replace '$request' with 'request'. Although the example below is demonstrated from the command line the problem is not specific to it. Thanks for you time! [EMAIL PROTECTED]:~$ /usr/local/java/jdk/bin/java -version java version "1.3.1" Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-b24) Java HotSpot(TM) Client VM (build 1.3.1-b24, mixed mode) [EMAIL PROTECTED]:~$ cat broken.xsl <?xml version='1.0'?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0"> <xsl:output method="html"/> <xsl:template match="/"> <xsl:variable name="request" select="request"/> <xsl:apply-templates select="people"> <xsl:sort select="$request/parameter=name"/> </xsl:apply-templates> </xsl:template> </xsl:stylesheet> [EMAIL PROTECTED]:~$ /usr/local/java/jdk/bin/java org.apache.xalan.xslt.Process -XSL broken.xsl -EDUMP javax.xml.transform.TransformerConfigurationException: javax.xml.transform.TransformerException: java.lang.NullPointerException at org.apache.xalan.processor.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:922) at org.apache.xalan.xslt.Process.main(Process.java:759) --------- javax.xml.transform.TransformerException: java.lang.NullPointerException at org.apache.xalan.processor.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:916) at org.apache.xalan.xslt.Process.main(Process.java:759) --------- java.lang.NullPointerException at org.apache.xpath.operations.Variable.getElemVariable(Variable.java:312) at org.apache.xpath.operations.Variable.getAnalysisBits(Variable.java:362) at org.apache.xpath.axes.FilterExprWalker.getAnalysisBits(FilterExprWalker.java:305) at org.apache.xpath.axes.WalkingIterator.getAnalysisBits(WalkingIterator.java:129) at org.apache.xpath.axes.WalkingIteratorSorted.fixupVariables(WalkingIteratorSorted.java:235) at org.apache.xpath.operations.Operation.fixupVariables(Operation.java:91) at org.apache.xpath.XPath.fixupVariables(XPath.java:111) at org.apache.xalan.templates.ElemSort.compose(ElemSort.java:382) at org.apache.xalan.templates.ElemForEach.compose(ElemForEach.java:157) at org.apache.xalan.templates.ElemCallTemplate.compose(ElemCallTemplate.java:150) at org.apache.xalan.templates.ElemApplyTemplates.compose(ElemApplyTemplates.java:164) at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:358) at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:363) at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:363) at org.apache.xalan.templates.StylesheetRoot.recompose(StylesheetRoot.java:338) at org.apache.xalan.processor.StylesheetHandler.endDocument(StylesheetHandler.java:479) at org.apache.xerces.parsers.AbstractSAXParser.endDocument(Unknown Source) at org.apache.xerces.impl.XMLDocumentScannerImpl.endEntity(Unknown Source) at org.apache.xerces.impl.XMLEntityManager.endEntity(Unknown Source) at org.apache.xerces.impl.XMLEntityScanner.load(Unknown Source) at org.apache.xerces.impl.XMLEntityScanner.skipSpaces(Unknown Source) at org.apache.xerces.impl.XMLDocumentScannerImpl$TrailingMiscDispatcher.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.xalan.processor.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:892) at org.apache.xalan.xslt.Process.main(Process.java:759) --------- java.lang.NullPointerException at org.apache.xpath.operations.Variable.getElemVariable(Variable.java:312) at org.apache.xpath.operations.Variable.getAnalysisBits(Variable.java:362) at org.apache.xpath.axes.FilterExprWalker.getAnalysisBits(FilterExprWalker.java:305) at org.apache.xpath.axes.WalkingIterator.getAnalysisBits(WalkingIterator.java:129) at org.apache.xpath.axes.WalkingIteratorSorted.fixupVariables(WalkingIteratorSorted.java:235) at org.apache.xpath.operations.Operation.fixupVariables(Operation.java:91) at org.apache.xpath.XPath.fixupVariables(XPath.java:111) at org.apache.xalan.templates.ElemSort.compose(ElemSort.java:382) at org.apache.xalan.templates.ElemForEach.compose(ElemForEach.java:157) at org.apache.xalan.templates.ElemCallTemplate.compose(ElemCallTemplate.java:150) at org.apache.xalan.templates.ElemApplyTemplates.compose(ElemApplyTemplates.java:164) at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:358) at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:363) at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:363) at org.apache.xalan.templates.StylesheetRoot.recompose(StylesheetRoot.java:338) at org.apache.xalan.processor.StylesheetHandler.endDocument(StylesheetHandler.java:479) at org.apache.xerces.parsers.AbstractSAXParser.endDocument(Unknown Source) at org.apache.xerces.impl.XMLDocumentScannerImpl.endEntity(Unknown Source) at org.apache.xerces.impl.XMLEntityManager.endEntity(Unknown Source) at org.apache.xerces.impl.XMLEntityScanner.load(Unknown Source) at org.apache.xerces.impl.XMLEntityScanner.skipSpaces(Unknown Source) at org.apache.xerces.impl.XMLDocumentScannerImpl$TrailingMiscDispatcher.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.xalan.processor.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:892) at org.apache.xalan.xslt.Process.main(Process.java:759)
