Package org.xj3d.impl.core.loading

Class WeakRefFileCache

java.lang.Object

org.xj3d.impl.core.loading.WeakRefFileCache

All Implemented Interfaces:

FileCache

public class WeakRefFileCache
extends Object
implements FileCache

The file cache implementation uses the standard WeakHashMap as the storage mechanism.

Items are stored in the WeakHashMap so that when an item no longer needs data, that item can be discarded.

The internal implementation is thread safe, choosing to synchronize on the internal mapping structures. This prevents one thread from loading something into the cache and then having another thread interrupt it half way through and get bogus data.

Version:

$Revision: 1.1 $

Author:

Justin Couch

Constructor Summary

Constructors

Constructor	Description
WeakRefFileCache()	Construct a default instance of this class.

Method Summary

Modifier and Type	Method	Description
void	cacheFile(String uri, String contentType, Object content)	Store the item in the cache.
CacheDetails	checkForFile(String uri)	Check the cache for the file nominated by this URI string.

Methods inherited from class java.lang.Object

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

Constructor Details

WeakRefFileCache

public WeakRefFileCache()

Construct a default instance of this class.

Method Details

checkForFile

public CacheDetails checkForFile(String uri)

Check the cache for the file nominated by this URI string. Always returns null.

Specified by:

checkForFile in interface FileCache

Parameters:

uri - The uri to check for

Returns:

The details of the item in cache or null

cacheFile

public void cacheFile(String uri,
 String contentType,
 Object content)

Store the item in the cache. Request is ignored

Specified by:

cacheFile in interface FileCache

Parameters:

uri - The uri string for the content

contentType - A String describing the MIME type of the content

content - The actual Java representation of the URI's content