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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=11792 XPathAPI throws NPE If Any Extension Function Used Summary: XPathAPI throws NPE If Any Extension Function Used Product: XalanJ2 Version: 2.4Dx Platform: All OS/Version: All Status: NEW Severity: Major Priority: Other Component: org.apache.xpath AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] XPathAPI constructs an XPathContext using the default ctor (i.e. not supplying an ExtensionProvider). Thus, when any attempt is made to call an extension function, a null ExtensionProvider pointer is retrieved and dereferenced resulting in NPE at FuncExtFunction.java:196. XPathContext is constructed in XPathAPI.java or CachedXPathAPI.java (e.g. xpathSupport = new XPathContext();). XPath used: /ico/keywords/keyword[regexp:containsMatch('ll*', 'llal')] containsMatch is defined in the PatternMatcher class (no package). PatternMatcher source and instructions are available at: http://www-106.ibm.com/developerworks/library/x-callbk/?open&l=976,t=gr Tested using ApplyXPath sample. Test Document used was: <ico xmlns:regexp="xalan://PatternMatcher"> <id>423234</id> <keywords> <keyword>Haus</keyword> <keyword>Baum</keyword> <keyword>Auto</keyword> <keyword>Boot</keyword> <keyword>Sonne</keyword> </keywords> <faws> <faw>Meier</faw> <faw>Muller</faw> <faw>Bremen</faw> <faw>Winter</faw> <faw>Boot</faw> <faw>PC</faw> </faws> <author>Heiner Meier</author> <words>502</words> <date>19082002</date> </ico> Stack trace wass: Exception in thread "main" java.lang.NullPointerException at org.apache.xpath.functions.FuncExtFunction.execute (FuncExtFunction.java:196) at org.apache.xpath.axes.PredicatedNodeTest.executePredicates (PredicatedNodeTest.java:326) at org.apache.xpath.axes.PredicatedNodeTest.acceptNode (PredicatedNodeTest.java:458) at org.apache.xpath.axes.AxesWalker.nextNode(AxesWalker.java:406) at org.apache.xpath.axes.WalkingIterator.nextNode (WalkingIterator.java:176) at org.apache.xpath.axes.NodeSequence.nextNode(NodeSequence.java:320) at org.apache.xml.dtm.ref.DTMNodeIterator.nextNode (DTMNodeIterator.java:195) at ApplyXPath.doMain(ApplyXPath.java:134) at ApplyXPath.main(ApplyXPath.java:183) Have seen similar results attempting to use EXSLT functions via XPathAPI. The implication, planned or not, is that XPathAPI and CachedXPathAPI currently do not support the use of extension functions.
