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From Istvan Beszteri <istvan.beszt...@hut.fi>
Subject Re: own generator
Date Thu, 01 Aug 2002 09:35:51 GMT
Hi All,

Thanks for the help.
I tried Geoff's modified version, and it works with some small corrections.
Here is the code (Maybe some of the imports are not used at all):

import java.io.IOException;
import java.io.StringReader;
import org.xml.sax.XMLReader;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.XMLReaderFactory;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.generation.AbstractGenerator;
import java.lang.String;

// for the setup() method
import org.apache.cocoon.environment.SourceResolver;
import java.util.Map;
import org.apache.avalon.framework.parameters.Parameters;

// used to get and hold the request parameters.
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import java.util.Enumeration;

// SAX helper
import org.xml.sax.helpers.AttributesImpl;


public class NewAnyName extends AbstractGenerator 
{

    // will be initialized in the setup() method and used in generate()
    Request request = null;
    Enumeration paramNames = null;
    String uri = null;

    /**
     * Implement the generate() method from AbstractGenerator.
     * It simply generates SAX events using SAX methods.
     */

    public void generate() throws IOException, SAXException, 
ProcessingException
    {
	// xspAttr will stay empty for this simple implementation
	// If we had any attributes in our tags, we would add them to this variable
	// before the call to startElement(), and either create a new AttributesImpl
	// instance for each element, or reuse one being careful to reset it before 
	// each use.
	AttributesImpl xspAttr = new AttributesImpl();

      // contentHandler is inherited from 
org.apache.cocoon.xml.AbstractXMLProducer
      contentHandler.startDocument();
      
      // Do it with SAX:
      contentHandler.startElement("", "doc", "doc", xspAttr);

      contentHandler.startElement("", "uri", "uri", xspAttr);

      contentHandler.characters(uri.toCharArray(),0,uri.length());

      contentHandler.endElement("", "uri", "uri");
      
      contentHandler.startElement("", "params", "params", xspAttr);
         
      while (paramNames.hasMoreElements())
      {
          contentHandler.startElement("", "param", "param", xspAttr);
          
	  String param = (String)paramNames.nextElement();
	  contentHandler.characters(param.toCharArray(),0,param.length());

          contentHandler.endElement("","param", "param");
      }
            
      contentHandler.endElement("","params", "params");

      contentHandler.startElement("", "source", "source", xspAttr);

      if(source != null)
          contentHandler.characters(source.toCharArray(),0,
				    source.length());

      contentHandler.endElement("", "source", "source");

      contentHandler.endElement("","doc", "doc");

      contentHandler.endDocument();
   }
   
   public void setup(SourceResolver resolver, Map objectModel, String src,
		     Parameters par)
   {
       request = ObjectModelHelper.getRequest(objectModel);
       paramNames = request.getParameterNames();
       uri = request.getRequestURI();
   }
}

The pipeline is the following:

<map:pipeline>
    <map:match pattern="foo/*">
      <map:act type="request">
        <map:parameter name="parameters" value="true"/>
        <map:generate type="ist" source="{../1}"/>
      </map:act>
      <map:serialize type="xml"/>
    </map:match>

    <map:handle-errors>
      <map:transform src="stylesheets/system/error2html.xsl"/>
      <map:serialize status-code="500"/>
    </map:handle-errors>
  </map:pipeline>


A test reqest:
http://localhost:8080/cocoon/foo/trial.xml?apple=3

result:

<?xml version="1.0" encoding="UTF-8"?>
<doc><uri>/cocoon/foo/trial.xml</uri><params><param>apple</param></params><source/></doc>

As you can see, the source filed is still null.
Anyway, my problem is solved. I can get the request in the generator. I'm 
just curious what is the solution for this "source" thing.

Br,
	Istvan

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