It's difficult to tell what your exact problem is without a real example. However, the documentation for evaluate can be found at http://xml.apache.org/xalan-j/extensionslib.html#evaluate.
Try making the argument a String by enclosing it in quotes. Evaluate expects a string. Gary -----Original Message----- From: Filkorn Roman [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 14, 2002 12:32 AM To: [EMAIL PROTECTED] Subject: problem with xalan:evaluate() Hi all, I am trying to use extension function 'http://xml.apache.org/xalan:evaluate' with this results: - if parameter is something what can be evaluated (for example: '{view:format($Formatter,"user")}' ), everything goes right. - if parameter is combined (text & ..., for example: 'StartServlet&UserID={view:getUser($Formatter)}'), NullPointerException is thrown (see below). (examples are not exact from my templates, so please don't check their syntax) Please, am I doing something wrong? I didn't find documentation for 'evaluate' and I am not sure if such a problem is not mentioned in there. Thank you very much for any kind of info (except of RTFM :-), Roman p.s. Sorry, I forgot: tried with Xalan J-2.2. XSLTProcessor.tranform: javax.xml.transform.TransformerException: java.lang.NullPointerException javax.xml.transform.TransformerException: java.lang.NullPointerException at org.apache.xalan.extensions.ExtensionHandlerJavaClass.callFunction(Exten sionHandlerJavaClass.java:357) at org.apache.xalan.extensions.ExtensionsTable.extFunction(ExtensionsTable. java:257) at org.apache.xpath.functions.FuncExtFunction.execute(FuncExtFunction.java: 181) at org.apache.xpath.Expression.executeCharsToContentHandler(Expression.java :301) at org.apache.xalan.templates.ElemValueOf.execute(ElemValueOf.java:319) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerI mpl.java:1729) at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:327) at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:282) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(Transfo rmerImpl.java:2012) at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerIm pl.java:1175) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.j ava:642) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.j ava:1092) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.j ava:1070) ... --------- java.lang.NullPointerException at org.apache.xpath.objects.XRTreeFrag.object(XRTreeFrag.java:119) at org.apache.xalan.extensions.ExtensionHandlerJavaClass.callFunction(Exten sionHandlerJavaClass.java:307) at org.apache.xalan.extensions.ExtensionsTable.extFunction(ExtensionsTable. java:257) at org.apache.xpath.functions.FuncExtFunction.execute(FuncExtFunction.java: 181) at org.apache.xpath.Expression.executeCharsToContentHandler(Expression.java :301) at org.apache.xalan.templates.ElemValueOf.execute(ElemValueOf.java:319) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.transformer.TransformerImpl.transformToRTF(TransformerI mpl.java:1729) at org.apache.xalan.templates.ElemVariable.getValue(ElemVariable.java:327) at org.apache.xalan.templates.ElemVariable.execute(ElemVariable.java:282) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:710) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(Ele mApplyTemplates.java:420) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates .java:226) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2186) at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(Transfo rmerImpl.java:2012) at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerIm pl.java:1175) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.j ava:642) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.j ava:1092) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.j ava:1070) ...
