package org.trails.component.blob;

 import org.apache.tapestry.BaseComponent;

 import org.apache.tapestry.IAsset;

 import org.apache.tapestry.annotations.ComponentClass;

 import org.apache.tapestry.annotations.InjectObject;

 import org.apache.tapestry.annotations.Parameter;

 import org.apache.tapestry.asset.AssetFactory;

 import org.trails.descriptor.IClassDescriptor;

 import org.trails.descriptor.IPropertyDescriptor;

 import org.trails.descriptor.extension.BlobDescriptorExtension;

 @ComponentClass(allowBody = true, allowInformalParameters = true)

 public abstract class TrailsDownload extends BaseComponent

 {

         private final static String noIcon = "/images/cross.png";

         private final static String noImage = "/images/noimage.jpg";

         @InjectObject("service:trails.core.FilePersister")

         public abstract IFilePersister getFilePersister();

         @InjectObject("service:trails.core.IconResolver")

         public abstract IconResolver getIconResolver();

         @InjectObject("service:tapestry.asset.ContextAssetFactory")

         public abstract AssetFactory getContextAssetFactory();

         @Parameter(required = true)

         public abstract Object getModel();

         @Parameter(required = true)

         public abstract IPropertyDescriptor getPropertyDescriptor();

         public BlobDescriptorExtension.RenderType getRenderType()

         {

                 return getPropertyDescriptor().getExtension(BlobDescriptorExtension.class).getRenderType();

         }

         public IAsset getByteArrayAsset()

         {

                 return getFilePersister().getAsset(getPropertyDescriptor(), getModel());

         }

         public IAsset getIcon()

         {

                 return getContentType() != null ? getIconResolver().getAsset(getContentType()) : getNoIcon();

         }

         private String getContentType()

         {

                 return getFilePersister().getContentType(getPropertyDescriptor(), getModel());

         }

         public String getFileName()

         {

                 return getFilePersister().getFileName(getPropertyDescriptor(), getModel());

         }

         public IAsset getNoIcon()

         {

                 return getContextAssetFactory().createAbsoluteAsset(noIcon, null, null);

         }

         public IAsset getNoImage()

         {

                 return getContextAssetFactory().createAbsoluteAsset(noImage, null, null);

         }

 }