de.ipcon.db.cache

Class SingleAttributeCacheKeyCalculator

java.lang.Object

de.ipcon.db.cache.SingleAttributeCacheKeyCalculator

All Implemented Interfaces:

CacheKeyCalculatorI, ServerSideEventInformationCalculatorI, java.io.Serializable

public class SingleAttributeCacheKeyCalculator
extends java.lang.Object
implements CacheKeyCalculatorI, java.io.Serializable

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SingleAttributeCacheKeyCalculator(java.lang.Class<? extends BOI> _cachedClass, java.lang.String _attributeName) Constructor for SingleAttributeKeyCalculator

Method Summary

Modifier and Type	Method and Description
java.lang.Object	calculate(java.lang.Object value) delegates to calculateKey(Object), is needed for implementing ServerSideEventInformationCalculatorI
java.lang.Object	calculateKey(java.lang.Object value) calculates a key used for caching the value from the given value
boolean	canHandle(java.lang.Class c) returns true, if this CacheKeyCalculatorI may calculate a key out of objects of the given class
java.lang.Class	getCachedClass() returns the class of the cached objects
java.lang.String	getDescription() Returns a String representation of this ServerSideEventInformationCalculatorI.
java.lang.String	getKeyAttributeName() Returns the attribute name of the attribute, the value of which is taken as key for caching a value.

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleAttributeCacheKeyCalculator

public SingleAttributeCacheKeyCalculator(java.lang.Class<? extends BOI> _cachedClass,
                                         java.lang.String _attributeName)

Constructor for SingleAttributeKeyCalculator

Method Detail

getKeyAttributeName

public java.lang.String getKeyAttributeName()

Description copied from interface: CacheKeyCalculatorI

Returns the attribute name of the attribute, the value of which is taken as key for caching a value.

Specified by:

getKeyAttributeName in interface CacheKeyCalculatorI

Returns:

the attribute name of the attribute, the value of which is taken as key for caching a value or null if the attribute name is either unknown or if the cache key is not based on the value of an attribute.

calculateKey

public java.lang.Object calculateKey(java.lang.Object value)

Description copied from interface: CacheKeyCalculatorI

calculates a key used for caching the value from the given value

Specified by:

calculateKey in interface CacheKeyCalculatorI

getCachedClass

public java.lang.Class getCachedClass()

Description copied from interface: CacheKeyCalculatorI

returns the class of the cached objects

Specified by:

getCachedClass in interface CacheKeyCalculatorI

canHandle

public boolean canHandle(java.lang.Class c)

Description copied from interface: CacheKeyCalculatorI

returns true, if this CacheKeyCalculatorI may calculate a key out of objects of the given class

Specified by:

canHandle in interface CacheKeyCalculatorI

Specified by:

canHandle in interface ServerSideEventInformationCalculatorI

calculate

public java.lang.Object calculate(java.lang.Object value)

Description copied from interface: CacheKeyCalculatorI

delegates to calculateKey(Object), is needed for implementing ServerSideEventInformationCalculatorI

Specified by:

calculate in interface CacheKeyCalculatorI

Specified by:

calculate in interface ServerSideEventInformationCalculatorI

getDescription

public java.lang.String getDescription()

Description copied from interface: ServerSideEventInformationCalculatorI

Returns a String representation of this ServerSideEventInformationCalculatorI. For static / singleton instances, this should be a distinct String identifying the purpose of this ServerSideEventInformationCalculatorI and it should not contain Runtime information, as separate instances of the same object will exist on client- and on server-side.

Specified by:

getDescription in interface ServerSideEventInformationCalculatorI