Saxon

Bug #5727

Updated by Michael Kay about 2 years ago

Xquery outputing a complex element does not work with domino, if xml has any attribute that is not namespace aware or its created with a document builder that’s not namespace aware. This seems to be because Node.getlocalName() does not have an implementation for Domino nodes, similar to whats present for TinyTree and DOMWrapper. 

 ``` 
 DomWrapper: 
 public static String getLocalName(Node node) { 
 /* 349 */         String s = node.getLocalName(); 
 /* 350 */         if (s == null) { 
 /*       */  
 /* 352 */            String n = node.getNodeName(); 
 /* 353 */            int colon = n.indexOf(58); 
 /* 354 */            return colon >= 0 ? n.substring(colon + 1) : n; 
 /*       */  
 /*       */  
 /*       */  
 /*       */         } else { 
 /* 359 */            return s; 
 /*       */         } 
 /*       */      } 



 TinyTree: 
  public String getLocalPart() { 
 /* 176 */         return this.tree.getNamePool().getLocalName(this.tree.attCode[this.nodeNr]); 
 /*       */      } 


 Domino: 
 /*       */      public String getLocalPart() { 
 /* 214 */         return this.domAttr.getLocalName(); 
 /*       */      } 

 /** 
      * Introduced in DOM Level 2. <p> 
      * 
      * Returns the local part of the qualified name of this node. 
      * For nodes created with a DOM Level 1 method, such as createElement 
      * from the Document interface, and for nodes of any type other than 
      * ELEMENT_NODE and ATTRIBUTE_NODE this is the same as the nodeName 
      * attribute. 
      * @since WD-DOM-Level-2-19990923 
      * @see AttrNSImpl 
      * @see ElementNSImpl 
      */ 
     public String               getLocalName() 
     { 
         return null; 
     } 

 ``` 


 ``` 
 



 Example: 
 public class XqueryTestBug { 
	 static String htdQuery = "<a>{(.)/htd:task}</a>"; 
	 static boolean useDomino = true; 
	 public static void main(String argv[]) throws Exception { 
		 try { 
			 run(argv[0]); 
		 } catch (SaxonApiException e) { 
			 // TODO Auto-generated catch block 
			 e.printStackTrace(); 
		 } catch (IOException e) { 
			 // TODO Auto-generated catch block 
			 e.printStackTrace(); 
		 } 
	 } 
	 private static void run(String xmlFile) throws SaxonApiException, IOException, Exception { 
		 // the Saxon processor object 
		 String  	 queryString = htdQuery; 
		 EnterpriseConfiguration pc = setupSaxonAndGetConfig(); 
		 pc.registerExternalObjectModel(DOMEnvelope.getInstance()); 
		 pc.registerExternalObjectModel(DOMObjectModel.getInstance()); 

		 Processor saxon = new Processor(pc); 
		 XQueryCompiler compiler = saxon.newXQueryCompiler(); 
		 compiler.declareNamespace("htd", "http://www.example.org/WS-HT"); 
		 compiler.declareNamespace("trt", "http://schemas.active-endpoints.com/b4p/wshumantask/2007/10/aeb4p-task-rt.xsd"); 
		 compiler.declareNamespace("tlc", "http://schemas.active-endpoints.com/b4p/wshumantask/2007/10/aeb4p-task-lifecycle-wsdl.xsd"); 
		 compiler.declareNamespace("sf", "http://schemas.active-endpoints.com/appmodules/screenflow/2010/10/avosScreenflow.xsd"); 

		 XQueryExecutable exec = compiler.compile(queryString); 
		 XQueryEvaluator query = exec.load(); 

		 //load document 
		 String input = FileUtils.readFileToString(new File(xmlFile)); 
		 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 
		 javax.xml.parsers.DocumentBuilder documentBuilder = factory.newDocumentBuilder(); 
		 InputSource inputSource = new InputSource(new StringReader(input)); 
		 org.w3c.dom.Document doc = documentBuilder.parse(inputSource); 

		 if(useDomino) { 
			 DominoTree domTree = DominoTree.makeTree(doc.getDocumentElement().getOwnerDocument(), pc, "systemID"); 
			 SequenceIterator next = domTree.getRootNode().iterateAxis(AxisInfo.CHILD,NodeKindTest.ELEMENT); 
			 GroundedValue gv = SequenceTool.toGroundedValue(next); 
			 DominoNode elNode = (DominoNode) gv.itemAt(0); 

			 query.setContextItem(      (XdmNode) XdmValue.wrap(gv)); 
		 } else { 
			 TransformerFactory tfactory = new EnterpriseTransformerFactory(pc); 
			 final Transformer transformer = tfactory.newTransformer(); 
			 PipelineConfiguration pipeconfig = pc.makePipelineConfiguration(); 
			 // set up holder for the output 
			 final TinyBuilder outputTarget = new TinyBuilder( 
					 pipeconfig); 

			 transformer.transform(new DOMSource(doc), outputTarget); 

			 TinyTree tt = outputTarget.getTree(); 
			 NodeInfo nodeInfo =    tt.getRootNode(); 
			 query.setContextItem(new XdmNode(nodeInfo)); 
		 } 

		 XdmValue result = query.evaluate(); 
	 } 
 } 

 ``` 

 Exception seen with Domino: 
 ``` 
 Exception in thread "main" java.lang.NullPointerException: Cannot invoke "String.equals(Object)" because the return value of "net.sf.saxon.om.NodeName.getLocalPart()" is null 
	 at net.sf.saxon.om.NameOfNode.equals(NameOfNode.java:177) 
	 at net.sf.saxon.om.SingletonAttributeMap.put(SingletonAttributeMap.java:69) 
	 at net.sf.saxon.om.NodeInfo.attributes(NodeInfo.java:482) 
	 at net.sf.saxon.tree.util.Navigator.copy(Navigator.java:678) 
	 at net.sf.saxon.om.NodeInfo.copy(NodeInfo.java:522) 
	 at net.sf.saxon.event.ComplexContentOutputter.decompose(ComplexContentOutputter.java:893) 
	 at net.sf.saxon.event.ComplexContentOutputter.append(ComplexContentOutputter.java:658) 
	 at net.sf.saxon.expr.Expression.lambda$process$0(Expression.java:948) 
	 at net.sf.saxon.om.SequenceTool.supply(SequenceTool.java:147) 
	 at net.sf.saxon.expr.Expression.process(Expression.java:948) 
	 at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:357) 
	 at net.sf.saxon.expr.instruct.ElementCreator.processLeavingTail(ElementCreator.java:298) 
	 at net.sf.saxon.expr.instruct.Instruction.process(Instruction.java:142) 
	 at net.sf.saxon.expr.parser.ExpressionTool.getIteratorFromProcessMethod(ExpressionTool.java:678) 
	 at net.sf.saxon.expr.instruct.Instruction.iterate(Instruction.java:374) 
	 at com.saxonica.ee.bytecode.ByteCodeCandidate.iterate(ByteCodeCandidate.java:328) 
	 at net.sf.saxon.query.XQueryExpression.iterator(XQueryExpression.java:378) 
	 at net.sf.saxon.s9api.XQueryEvaluator.evaluate(XQueryEvaluator.java:520) 
	 at XqueryTest.runStatic(XqueryTest.java:474) 
	 at XqueryTest.run(XqueryTest.java:140) 
	 at XqueryTest.main(XqueryTest.java:116) 

 ``` 


 

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