My taglib doesn't work

[Stephan Coboos]

Hello,
I had tried to write my own taglib using the TagTransformer but it 
doesn't work. I can't find some informations about it, so I had copied 
the example and changed something but it doesn't work. I want to use a 
tag <hello/> to print out "HELLO WORLD". My changes in detail:

1.) I had written my own class HelloWorldTag:
package foo.bar.taglib;
import org.apache.cocoon.taglib.XMLProducerTagSupport;
import org.xml.sax.SAXException;
import org.xml.sax.Attributes;
public class HelloWorldTag extends XMLProducerTagSupport {
   public int doStartTag(String namespaceURI, String localName, String 
qName, Attributes atts)
       throws SAXException {
         
       String hello = "HELLO WORLD";
          
       this.xmlConsumer.characters(hello.toCharArray(), 0, hello.length());
      
       this.getLogger().error("T E X T = " + hello);
      
       return this.EVAL_BODY;
   }
}

2.) I had created a subproject tagtest containing a xml file tagtest.xml:
<?xml version="1.0" encoding="ISO-8859-1"?>
<root xmlns:test="urn:apache:taglib:hello">
 <test:hello/>
</root>
3.) My sitemap looks as follow:
<?xml version="1.0" encoding="UTF-8"?>
<map:sitemap xmlns:map="http://apache.org/cocoon/sitemap/1.0";>
<map:components>
  <map:transformers default="tag">
     <map:transformer name="tag" 
src="org.apache.cocoon.transformation.TagTransformer" pool-max="64" 
pool-min="0" pool-grow="2" logger="sitemap.transformer.newtag">
       <transformer-hint>tag</transformer-hint>
     </map:transformer>
  </map:transformers>

</map:components>
<map:pipelines>
  <map:pipeline>
     <map:match pattern="">
        <map:generate type="file" src="tagtest.xml"/>
        <map:transform type="tag"/>
        <map:serialize type="xml"/>
     </map:match>
  </map:pipeline>
</map:pipelines>
</map:sitemap>
3.) In cocoon.xconf I had registered the tag :
   <taglib 
class="org.apache.cocoon.components.ExtendedComponentSelector" 
logger="sitemap.taglib.core" name="urn:apache:taglib:hello">
     <tag class="foo.bar.taglib.HelloWorldTag" 
logger="sitemap.taglib.core.source" name="hello"/>
   </taglib>

4.) After calling http://localhost:8080/cocoon/tagtest the tag <hello/> 
will not be replaces by "HELLO WORLD". I got the following output - 
nothing parsed:

<?xml version="1.0" encoding="ISO-8859-1" ?>
- <#>  <root xmlns:test="*urn:apache:taglib:hello*">
     <test:hello />
</root>
What is wrong here? Thank you for your help.
Regards
Stephan
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