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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=5496 Attlist.getValue and getIndex do not work Summary: Attlist.getValue and getIndex do not work Product: XalanJ2 Version: 2.2.x Platform: Other OS/Version: Other Status: NEW Severity: Normal Priority: Other Component: org.apache.xml.utils AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] This problem with getValue has been looked at by Joe Kesselmann who wrote: ======Joe's mail===================================================== Looking at getValue: It's miscoded. It assumes that the matching attribute will be found and immediately tries to convert it to a string, rather than stopping to check whether the match might have failed and returned null. return ((Attr) m_attrs.getNamedItem(localName)).getValue(); Actually, that's _badly_ miscoded; it also isn't using the namespace-aware call, which is why the search failed in the first place. Changing it to Node a=m_attrs.getNamedItemNS(uri,localName); return (a==null) ? null : a.getNodeValue(); cures the problem. This also avoids the typecast overhead, which should save us a cycle or two. Definite bug, trivial fix. I'll check it in. =======================end Joe's mail======================= =======================how to reproduce both problems============ To reproduce the problem: run the main() function in the class JaxpTest2 passing as an argument the name of a file which contains the following text: <?xml version="1.0" encoding="UTF-8"?> <deleted xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xmlns:enc="http://www.w3.org/2001/06/soap-encoding"; xsi:type="B1">0</deleted> The JaxpTest2 tries to access the attributes of the root via a small handler called TestHandler. The call to getIndex() which expects to retrieve the local name 'type' actually returns the attribute with local name 'enc'. The call to getValue() causes a NullPointer exception: java.lang.NullPointerException java.lang.String org.apache.xml.utils.AttList.getValue (java.lang.String, java.lang.String) void jaxp.test.TestHandler.startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes) void org.apache.xalan.transformer.TransformerIdentityImpl.startElement (java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes) void org.apache.xml.utils.TreeWalker.startNode(org.w3c.dom.Node) void org.apache.xml.utils.TreeWalker.traverse(org.w3c.dom.Node) void org.apache.xalan.transformer.TransformerIdentityImpl.transform (javax.xml.transform.Source, javax.xml.transform.Result) void jaxp.test.JaxpTest2.main(java.lang.String[]) ================================JaxpTest2===================== // Copyright (c) 2001 Brooks Automation package jaxp.test; import javax.xml.parsers.*; import javax.xml.transform.*; import javax.xml.transform.sax.*; import javax.xml.transform.dom.*; import javax.xml.transform.stream.*; import org.xml.sax.helpers.*; import org.xml.sax.*; import org.w3c.dom.*; import java.io.*; /** * A Class class. * <P> * @author Jan Hrabowski */ public class JaxpTest2 extends Object { /** * Constructor */ public JaxpTest2() { } /** * main * @param args */ public static void main(String[] args) throws TransformerConfigurationException, ParserConfigurationException, FileNotFoundException, IOException, SAXException, TransformerException, UnsupportedEncodingException { DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance(); dfactory.setNamespaceAware(true); DocumentBuilder docBuilder = dfactory.newDocumentBuilder(); Node doc = docBuilder.parse(new InputSource(args[0])); TransformerFactory transformerfactory = TransformerFactory.newInstance(); Transformer transformer = transformerfactory.newTransformer(); DOMSource domSource = new DOMSource(doc); SAXResult saxResult = new SAXResult(new TestHandler()); transformer.transform(domSource, saxResult); } } ============================TestHandler=============================== // Copyright (c) 2001 Brooks Automation package jaxp.test; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; /** * A Class class. * <P> * @author Jan Hrabowski */ public class TestHandler extends DefaultHandler { /** * Constructor */ public TestHandler() { } public void startElement(String namespaceURI, String sName, // simple name (localName) String qName, // qualified name Attributes attrs) throws SAXException { try { int i = attrs.getIndex("http://www.w3.org/2001/XMLSchema-instance";, "type"); System.out.println("local name=" + attrs.getLocalName(i)); String s = attrs.getValue("http://www.w3.org/2001/XMLSchema-instance";, "type"); } catch (Exception e){ e.printStackTrace(); } } }
