package org.trails.component.blob;

 import org.apache.tapestry.asset.AbstractAsset;

 import org.apache.tapestry.engine.ILink;

 import org.trails.descriptor.IPropertyDescriptor;

 import java.io.InputStream;

 import java.io.Serializable;

 /**

  * An implementation of {@link org.apache.tapestry.IAsset} for assets that are entity properties.

  */

 public class TrailsBlobAsset extends AbstractAsset

 {

         private BlobDownloadService bytesService;

         private Serializable id;

         private IPropertyDescriptor propertyDescriptor;

         public TrailsBlobAsset(BlobDownloadService chartService, IPropertyDescriptor propertyDescriptor, Serializable id)

         {

                 super(null, null);

                 this.bytesService = chartService;

                 this.id = id;

                 this.propertyDescriptor = propertyDescriptor;

         }

         public IPropertyDescriptor getPropertyDescriptor()

         {

                 return propertyDescriptor;

         }

         public Serializable getId()

         {

                 return id;

         }

         public String buildURL()

         {

                 ILink l = bytesService.getLink(false, new Object[]{this});

                 return l.getURL();

         }

         public InputStream getResourceAsStream()

         {

                 return null;

         }

 }