[jdom-interest] Problems with calls to getChild and getAttribute methods...

[Bruce Hacker]

	I recently started using/evaluating JDOM and am having a problem getting
results when I make calls to the getChild and getAttribute methods of
elements.  The error, Java Code and XML document that I am using are listed
below.  Any assistance will be appreciated.  I have tried making calls to
getChild several different ways (with and without the Namespace) but always
get the same error:

------------------------------Error message-----------------------------

org.jdom.NoSuchElementException: The element JavaXML:Title does not exist
within the specified element.
 	at org.jdom.Element.getChild(Element.java, Compiled Code)
 	at org.jdom.Element.getChild(Element.java:733)
 	at SAXTest.main(SAXTest.java:46)

-------------------------------Java Code--------------------------------

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.Namespace;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;

class SAXTest {

  public static void main(String[] args) {
    if (args.length != 1) {
      System.out.println("Usage: SAXTest [filename to parse]");
      return;
    }

    try {
        // Request document building without validation
        SAXBuilder builder = new SAXBuilder(false);
        Document doc = builder.build(new File(args[0]));

        System.out.println("Document successfully read\n");

        /*********************************************************/

        // Get the Root element of the document
        Element root = doc.getRootElement();
        Namespace ns = root.getNamespace();

        // Get the first title element
        Element title = root.getChild("JavaXML:Title");

        System.out.println("Root element name: " + root.getName());
        System.out.println("Namespace: " + root.getNamespacePrefix());
        System.out.println("Namespace URI: " + root.getNamespaceURI());
        System.out.println();
        System.out.println("  Title element: " + title.getName());

        /*********************************************************/

    } catch (JDOMException e) {
        e.printStackTrace();
    }
  }
}

--------------------------XML Document---------------------------------

<?xml version='1.0'?>

<!-- Comment out for now
 <?xml-stylesheet href="XSL\JavaXML.html.xsl" type="text/xsl"?>
 <?xml-stylesheet href="XSL\JavaXML.wml.xsl" type="text/xsl"
                  media="wap"?>
 <?cocoon-process type="xslt"?>
 <!DOCTYPE JavaXML:Book SYSTEM "DTD\JavaXML.dtd">
-->

<!-- Java and XML -->
<JavaXML:Book xmlns:JavaXML="http://www.oreilly.com/catalog/javaxml/">
 <JavaXML:Title>Java and XML</JavaXML:Title>
 <JavaXML:Contents>

  <JavaXML:Chapter focus="XML">
   <JavaXML:Heading>Introduction</JavaXML:Heading>
   <JavaXML:Topic subSections="7">What Is It?</JavaXML:Topic>
   <JavaXML:Topic subSections="3">How Do I Use It?</JavaXML:Topic>
   <JavaXML:Topic subSections="4">Why should I Use It?</JavaXML:Topic>
   <JavaXML:Topic subSections="0">What's Next?</JavaXML:Topic>
  </JavaXML:Chapter>

  <JavaXML:Chapter focus="XML">
   <JavaXML:Heading>Creating XML</JavaXML:Heading>
   <JavaXML:Topic subSections="0">An XML Document</JavaXML:Topic>
   <JavaXML:Topic subSections="2">The Header</JavaXML:Topic>
   <JavaXML:Topic subSections="6">The Content</JavaXML:Topic>
   <JavaXML:Topic subSections="1">What's Next?</JavaXML:Topic>
  </JavaXML:Chapter>

  <JavaXML:Chapter focus="Java">
   <JavaXML:Heading>Parsing XML</JavaXML:Heading>
   <JavaXML:Topic subSections="3">Getting Prepared</JavaXML:Topic>
   <JavaXML:Topic subSections="3">SAX Readers</JavaXML:Topic>
   <JavaXML:Topic subSections="9">Content Handlers</JavaXML:Topic>
   <JavaXML:Topic subSections="4">Error Handlers</JavaXML:Topic>
   <JavaXML:Topic subSections="0">
     A Better Way to Load a Parser
   </JavaXML:Topic>
   <JavaXML:Topic subSections="4">"Gotcha!"</JavaXML:Topic>
   <JavaXML:Topic subSections="0">What's Next?</JavaXML:Topic>
  </JavaXML:Chapter>

  <JavaXML:SectionBreak/>

  <JavaXML:Chapter focus="Java">
   <JavaXML:Heading>Web Publishing Frameworks</JavaXML:Heading>
   <JavaXML:Topic subSections="4">Selecting a Framework</JavaXML:Topic>
   <JavaXML:Topic subSections="4">Installation</JavaXML:Topic>
   <JavaXML:Topic subSections="3">
     Using a Publishing Framework
   </JavaXML:Topic>
   <JavaXML:Topic subSections="2">XSP</JavaXML:Topic>
   <JavaXML:Topic subSections="3">Cocoon 2.0 and Beyond</JavaXML:Topic>
   <JavaXML:Topic subSections="0">What's Next?</JavaXML:Topic>
  </JavaXML:Chapter>

 </JavaXML:Contents>

<!-- Comment out for now
 <JavaXML:Copyright>&OReillyCopyright;</JavaXML:Copyright>
-->

</JavaXML:Book>


Regards