cbr.service
Class LocalStoreDelegate

java.lang.Object
  cbr.service.LocalStoreDelegate

All Implemented Interfaces:

StoreDelegate

public class LocalStoreDelegate

extends Object

implements StoreDelegate

This delegate handles thumbnails on behalf of the PicsStore. It cuts thumbnails out of the picture entries when entries are inserted into an index, and pastes them back in when entries are retrieved. Additionally, a delegate can be instructed to delete thumbnails e. g. when entries are deleted from an index.

Version:

"$Id: LocalStoreDelegate.java 1913 2007-08-08 02:41:53Z jpeters $"

Author:

Volker Roth

Field Summary

private PicsSource

pics_ The PicsSource from which thumbnails are retrieved.

Constructor Summary

LocalStoreDelegate(PicsSource pics)
Creates an instance that assumes that thumbnails are already available locally.

Method Summary

void	cut(PictureEntry entry) Deletes the thumbnail from the given entry.
void	delete(PictureEntry entry) Does nothing.
void	paste(PictureEntry entry) Retrieves the thumbnail with the name found in the given entry from the PicsSource of this instance.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

pics_

private PicsSource pics_

The PicsSource from which thumbnails are retrieved.

Constructor Detail

LocalStoreDelegate

public LocalStoreDelegate(PicsSource pics)

Creates an instance that assumes that thumbnails are already available locally. Thumbnails are simply erased from picture entries. They are restored later by calling the given PicsSource.

Parameters:

pics - The PicsSource from which the thumbnails are retrieved.

Method Detail

cut

public void cut(PictureEntry entry)
         throws IOException

Deletes the thumbnail from the given entry. The thumbnail is recreated later by means of a PicsSource.

Specified by:

cut in interface StoreDelegate

Parameters:

entry - The entry from which the thumbnail is removed and stored away.

Throws:

IOException - if an I/O error occurs.

paste

public void paste(PictureEntry entry)
           throws IOException

Retrieves the thumbnail with the name found in the given entry from the PicsSource of this instance.

Specified by:

paste in interface StoreDelegate

Parameters:

entry - The picture entry whose thumbnail shall be restored.

Throws:

IOException - if an I/O error occurs.

delete

public void delete(PictureEntry entry)

Does nothing.

Specified by:

delete in interface StoreDelegate

Parameters:

entry - The picture entry whose thumbnail shall be deleted.