Re: DOM problem

[Martin Honnen <mahotrash@yahoo.de>]

Jirka Kosek wrote:

> Martin Honnen wrote:
> 
>> As far as I know the parser that comes with the Sun JDK 1.4 is called 
>> Crimson and is only able to validate against a DTD.
> 
> 
> JDK 1.4 uses Xerces, but supports only JAXP 1.1. Schema validation was 
> added in JAXP 1.2 so JDK 1.4 does not support it out of the box.

When I compile and run the following test program with my JDK 1.4 on 
Windows XP

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;

import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;

public class Test20040418 {

   public static void main (String[] args) {
     try {
       DocumentBuilderFactory documentBuilderFactory = 
DocumentBuilderFactory.newInstance();
       documentBuilderFactory.setNamespaceAware(true);

       DocumentBuilder documentBuilder = 
documentBuilderFactory.newDocumentBuilder();

       DOMImplementation domImplementation = 
documentBuilder.getDOMImplementation();

       Document xmlDocument = domImplementation.createDocument("", 
"root", null);

       System.out.println("documentBuilderFactory: " + 
documentBuilderFactory);
       System.out.println("documentBuilder: " + documentBuilder);
       System.out.println("domImplementation: " + domImplementation);
       System.out.println("document: " + xmlDocument);
     }
     catch (Exception e) {
       System.out.println("Error: " + e);
     }
   }

}

the output is


documentBuilderFactory: 
org.apache.crimson.jaxp.DocumentBuilderFactoryImpl@119298d
documentBuilder: org.apache.crimson.jaxp.DocumentBuilderImpl@f72617
domImplementation: org.apache.crimson.tree.DOMImplementationImpl@1e5e2c3
document: org.apache.crimson.tree.XmlDocument@18a992f

thus in my understanding it is not Xerces that comes with the JDK 1.4 
but Crimson.
And http://xml.apache.org/crimson/index.html says

The Crimson codebase is based on the Sun Project X parser. It is also 
the parser currently shipping in Sun products; however, the future plan 
is to move to a different codebase called Xerces Java 2

so I still think JDK 1.4 uses Crimson and not Xerces (unless you tell it 
to use by setting properties/classpath as needed).