package yarfraw.mapping.forward.impl;

 import java.util.List;

 import yarfraw.core.datamodel.ChannelFeed;

 import yarfraw.core.datamodel.ItemEntry;

 import yarfraw.core.datamodel.YarfrawException;

 import yarfraw.generated.rss10.elements.ObjectFactory;

 import yarfraw.generated.rss10.elements.RDF;

 import yarfraw.mapping.forward.ToRss10Channel;

 /**

  * Util methods for mapping Yarfraw core model to Rss10 Jaxb model

  * @author jliang

  *

  */

 public class ToRss10ChannelImpl implements ToRss10Channel{

   private static ToRss10Channel _instance = new ToRss10ChannelImpl();

   private static final ObjectFactory FACTORY = new ObjectFactory();

   public static final ToRss10Channel getInstance(){

     return _instance;

   }

   private ToRss10ChannelImpl(){}

   /**

    * Model: (channel, image?, item+, textinput?)

    */

   public RDF execute(ChannelFeed ch)

       throws YarfrawException {

     RDF rdf = FACTORY.createRDF();

     List<Object> elementList = rdf.getChannelOrImageOrItem();

     elementList.add(Rss10MappingUtils.toChannel(ch));

     if(ch.getImageOrIcon() != null){

       elementList.add(Rss10MappingUtils.toRss10Image(ch.getImageOrIcon()));

     }

     if(ch.getItems() != null){

       for(ItemEntry item : ch.getItems()){

         if(item != null){

           elementList.add(ToRss10ChannelItemImpl.getInstance().execute(item));

         }

       }

     }

     if(ch.getTexInput() != null){

       elementList.add(Rss10MappingUtils.toRss10TextInput(ch.getTexInput()));

     }

     return rdf;

   }

 }