Package jadex.commons

Class ObjectCache

java.lang.Object

jadex.commons.ObjectCache

All Implemented Interfaces:

java.io.Serializable

public class ObjectCache
extends java.lang.Object
implements java.io.Serializable

A cache for CachedObjects that reflect files. A cached object is loaded per filename (not the filename of the held object in the cache).

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.Map	cache	The expression caches for filename.
protected java.lang.String	filename	The filename of the cache.
protected boolean	persist_always	The persist strategy (always or only on demand by manually calling persist).
protected boolean	persist_single	The flag indicating if cached objects are stored on disk themselves.

Constructor Summary

Constructors

Constructor	Description
ObjectCache(java.lang.String filename)	Create a new cache.
ObjectCache(java.lang.String filename, boolean persist_always, boolean persist_single)	Create a new cache.
ObjectCache(java.lang.String filename, boolean persist_always, boolean persist_single, int max)	Create a new cache.

Method Summary

Modifier and Type	Method	Description
void	add(CachedObject co)	Add a cached object.
void	clear()	Clear the cache.
CachedObject	loadCachedObject(java.lang.String filename, long lastmodified)	Load the cached file.
static ObjectCache	loadObjectCache(java.lang.String filename)	Load the model cache.
void	persist()	Presist the cached object.
void	remove(java.lang.String filename)	Add a cached object.

Methods inherited from class java.lang.Object

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

Field Detail

persist_always

protected boolean persist_always

The persist strategy (always or only on demand by manually calling persist).

persist_single

protected boolean persist_single

The flag indicating if cached objects are stored on disk themselves.

filename

protected java.lang.String filename

The filename of the cache.

cache

protected java.util.Map cache

The expression caches for filename.

Constructor Detail

ObjectCache

public ObjectCache(java.lang.String filename)

Create a new cache.

ObjectCache

public ObjectCache(java.lang.String filename,
                   boolean persist_always,
                   boolean persist_single)

Create a new cache.

ObjectCache

public ObjectCache(java.lang.String filename,
                   boolean persist_always,
                   boolean persist_single,
                   int max)

Create a new cache.

Method Detail

loadCachedObject

public CachedObject loadCachedObject(java.lang.String filename,
                                     long lastmodified)

Load the cached file.

Parameters:

filename - The filename of the cached object.

lastmodified - The last modified date important for the up-to-date check. -1 for do not check.

add

public void add(CachedObject co)

Add a cached object.

Parameters:

co - The new object.

remove

public void remove(java.lang.String filename)

Add a cached object.

Parameters:

filename - The filename.

persist

public void persist()
             throws java.io.IOException

Presist the cached object.

Throws:

java.io.IOException

clear

public void clear()

Clear the cache.

loadObjectCache

public static ObjectCache loadObjectCache(java.lang.String filename)

Load the model cache.

Parameters:

filename - The filename.

Returns:

The object cache.