[jira] Resolved: (XERCESJ-1147) Parsed document is not fully initialized until getFirstChild() is called

["Michael Glavassevich (JIRA)" <xe...@xml.apache.org>]

     [ http://issues.apache.org/jira/browse/XERCESJ-1147?page=all ]

Michael Glavassevich resolved XERCESJ-1147.
-------------------------------------------

    Fix Version/s: 2.8.1
       Resolution: Fixed

Seems like Saxon is casting a Xerces' DOM node directly to a NodeList. Because this bypasses the synchronizeChildren() call in ParentNode.getChildNodes() the children may not be expanded yet if getLength() or item() are called on the NodeList. This should be fixed now.

> Parsed document is not fully initialized until getFirstChild() is called
> ------------------------------------------------------------------------
>
>                 Key: XERCESJ-1147
>                 URL: http://issues.apache.org/jira/browse/XERCESJ-1147
>             Project: Xerces2-J
>          Issue Type: Bug
>          Components: DOM (Level 3 Core)
>    Affects Versions: 2.8.0
>         Environment: java version "1.5.0_06"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
> Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)
> Saxon: saxonb8-7j
>            Reporter: Libor Valenta
>         Assigned To: Michael Glavassevich
>             Fix For: 2.8.1
>
>
> I have problems with Xerces bundled with JDK 1.5 as well as Xerces-J 2.8.0, I was usin XSLT 2.0 transformer Saxon 8.7 to access document produced by java extension. Problems go away when I call document.getFirstChild(); before returning document for the transformation, the side-effect of getFirstChild() makes me believe that there is something wrong with implementation of the Document. 
> Here is simple code to demostrate the problem Test .java:
> import org.w3c.dom.Document;
> import org.xml.sax.InputSource;
> import javax.xml.parsers.DocumentBuilder;
> import javax.xml.parsers.DocumentBuilderFactory;
> import javax.xml.transform.Transformer;
> import javax.xml.transform.TransformerException;
> import javax.xml.transform.TransformerFactory;
> import javax.xml.transform.stream.StreamResult;
> import javax.xml.transform.stream.StreamSource;
> import java.io.StringReader;
> import java.io.StringWriter;
> public class Test {
>   // this will call test1() which DOES call getFirstChild() before document is returned
>   static String XSL1 = "<?xml version=\"1.0\"?>\n" +
>           "<xsl:stylesheet xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" version=\"2.0\" xmlns:test=\"Test\">\n" +
>           "  <xsl:template match=\"/\">\n" +
>           "    <xsl:copy-of select=\"test:test1()\"/>\n" +
>           "  </xsl:template>\n" +
>           "</xsl:stylesheet>";
>   // this will call test2() which DOES NOT call getFirstChild() before document is returned
>   static String XSL2 = "<?xml version=\"1.0\"?>\n" +
>           "<xsl:stylesheet xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" version=\"2.0\" xmlns:test=\"Test\">\n" +
>           "  <xsl:template match=\"/\">\n" +
>           "    <xsl:copy-of select=\"test:test2()\"/>\n" +
>           "  </xsl:template>\n" +
>           "</xsl:stylesheet>";
>   public static void main(String[] args) throws Exception {
>     transform(XSL1);  // Result is: <?xml version="1.0" encoding="UTF-8"?><y/>
>     transform(XSL2);  // Result is: 
>   }
>   private static void transform(String xsl) throws TransformerException {
>     Transformer transformer = TransformerFactory.newInstance().newTransformer(new StreamSource(new StringReader(xsl)));
>     StringWriter out = new StringWriter();
>     transformer.transform(new StreamSource(new StringReader("<x/>")), new StreamResult(out));
>     System.out.println("Result is: " + out);
>   }
>   public static Document test1() throws Exception {
>     DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
>     Document document = documentBuilder.parse(new InputSource(new StringReader("<y/>")));
>     // next call has some side-effect that make things work, synchronizeChildren() ?
>     // likely bug in com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl
>     document.getFirstChild();
>     return document;
>   }
>   public static Document test2() throws Exception {
>     DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
>     Document document = documentBuilder.parse(new InputSource(new StringReader("<y/>")));
>     return document;
>   }
> }
> I do not know how Saxon is using the document, but whatever it does, it should behave same way for test1() and test2()

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