Package org.pentaho.reporting.libraries.resourceloader.cache

Class NullResourceDataCache

java.lang.Object

org.pentaho.reporting.libraries.resourceloader.cache.NullResourceDataCache

All Implemented Interfaces:

ResourceDataCache

public class NullResourceDataCache
extends Object
implements ResourceDataCache

Disables caching. It simply returns null on every request and ignores the put requests. You certainly want to use one of the other cache providers in real world applications.

Author:

Thomas Morgner

Constructor Summary

Constructors

Constructor	Description
NullResourceDataCache()

Method Summary

Modifier and Type	Method	Description
void	clear()	Remove all cached entries.
ResourceDataCacheEntry	get(ResourceKey key)	Retrieves the given data from the cache.
ResourceData	put(ResourceManager caller, ResourceData data)	Stores the given data on the cache.
void	remove(ResourceData data)
void	shutdown()

Methods inherited from class java.lang.Object

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

Constructor Detail

NullResourceDataCache

public NullResourceDataCache()

Method Detail

put

public ResourceData put(ResourceManager caller,
                        ResourceData data)
                 throws ResourceLoadingException

Description copied from interface: ResourceDataCache

Stores the given data on the cache. The data is registered by its primary key. The cache has to store the current version of the data.

Specified by:

put in interface ResourceDataCache

data - the data to be stored in the cache

Returns:

the resource data object, possibly wrapped by a cache-specific implementation.

Throws:

ResourceLoadingException

get

public ResourceDataCacheEntry get(ResourceKey key)

Description copied from interface: ResourceDataCache

Retrieves the given data from the cache.

Specified by:

get in interface ResourceDataCache

Parameters:

key - the resource key for the data.

remove

public void remove(ResourceData data)

Specified by:

remove in interface ResourceDataCache

clear

public void clear()

Description copied from interface: ResourceDataCache

Remove all cached entries. This should be called after the cache has become invalid or after it has been removed from a resource manager.

Specified by:

clear in interface ResourceDataCache

shutdown

public void shutdown()

Specified by:

shutdown in interface ResourceDataCache