com.beasys.commerce.foundation.property
Class EntityPropertyCache

java.lang.Object
  |
  +--com.beasys.commerce.foundation.property.EntityPropertyCache

public class EntityPropertyCache

extends java.lang.Object

Class used to cache properties for a given entity. This is used by the EntityPropertyManager implementation to reduce database hits on property retrieval.

Constructor Summary

EntityPropertyCache()

Method Summary

protected void	cacheNullValue(EntityPropertyCacheKey key) Mark a property has having a null value.
protected void	clear() Clear the current cache
protected java.lang.Object	getCachedValue(EntityPropertyCacheKey key) Get a value from the cache
protected boolean	isCachedAsNull(EntityPropertyCacheKey key) Determine if a property has a null value
protected void	putCachedValue(EntityPropertyCacheKey key, java.lang.Object value) Put a value in the cache
protected void	removeCachedValue(EntityPropertyCacheKey key) Remove a value from the cache

Methods inherited from class java.lang.Object

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

Constructor Detail

EntityPropertyCache

public EntityPropertyCache()

Method Detail

getCachedValue

protected java.lang.Object getCachedValue(EntityPropertyCacheKey key)

Get a value from the cache

Parameters:

key - the key to lookup

Returns:

the property value, or null if there is none.

removeCachedValue

protected void removeCachedValue(EntityPropertyCacheKey key)

Remove a value from the cache

Parameters:

key - the key to remove

putCachedValue

protected void putCachedValue(EntityPropertyCacheKey key,
                              java.lang.Object value)

Put a value in the cache

Parameters:

key - the key of the new value

value - the value to cache

clear

protected void clear()

Clear the current cache

cacheNullValue

protected void cacheNullValue(EntityPropertyCacheKey key)

Mark a property has having a null value. This is to differentiate properties without values from properties that have not been checked yet, or could not be found.

Parameters:

key - the key to mark

isCachedAsNull

protected boolean isCachedAsNull(EntityPropertyCacheKey key)

Determine if a property has a null value

Parameters:

key - the key to check

Returns:

true if the property has a null value