com.helger.commons.gfx

Class ImageDataManager

java.lang.Object

com.helger.commons.gfx.ImageDataManager

@ThreadSafe
@Singleton
public final class ImageDataManager
extends Object

This service class is used to cache information about images. It is used to set the HTML attributes width and height for images. It has an internal cache to avoid querying the data every time.

Author:

Philip Helger

Method Summary

Methods

Modifier and Type	Method and Description
EChange	clearCache() Remove all cached elements
EChange	clearCachedSize(IReadableResource aRes) Remove a single resource from the cache.
Map<IReadableResource,SizeInt>	getAllCachedSizes()
Set<IReadableResource>	getAllNotExistingResources()
SizeInt	getImageSize(IReadableResource aRes)
static ImageDataManager	getInstance()
static boolean	isInstantiated()

Methods inherited from class java.lang.Object

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

Method Detail

isInstantiated

public static boolean isInstantiated()

getInstance

@Nonnull
public static ImageDataManager getInstance()

getImageSize

@Nullable
public SizeInt getImageSize(@Nullable
                            IReadableResource aRes)

clearCachedSize

@Nonnull
public EChange clearCachedSize(@Nullable
                              IReadableResource aRes)

Remove a single resource from the cache.

Parameters:

aRes - The resource to be removed. May be null.

Returns:

Never null.

clearCache

@Nonnull
public EChange clearCache()

Remove all cached elements

Returns:

EChange - never null

getAllCachedSizes

@Nonnull
@ReturnsMutableCopy
public Map<IReadableResource,SizeInt> getAllCachedSizes()

getAllNotExistingResources

@Nonnull
@ReturnsMutableCopy
public Set<IReadableResource> getAllNotExistingResources()