Package de.hybris.platform.util

Class SingletonCreator

java.lang.Object

de.hybris.platform.util.SingletonCreator

public class SingletonCreator
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SingletonCreator.Creator<T>	abstract class used to for the Singleton creation.
static class	SingletonCreator.SingletonCreateException
static class	SingletonCreator.SingletonDestroyException

Field Summary

Fields

Modifier and Type	Field	Description
static org.apache.log4j.Logger	log

Constructor Summary

Constructors

Constructor	Description
SingletonCreator()	creates a new SingletonCreator instance

Method Summary

Modifier and Type	Method	Description
void	clear()
void	destroy()	destroys this SingletonCreator instance this method will call the destroy() method of each SingletonCreator.Creator instance that was used when calling getSingleton() in reverse order to allow you to cleanup correctly
<T> T	getSingleton(SingletonCreator.Creator<T> creator)	returns a single instance created by the given Creator.
<T> T	getSingleton(java.lang.Class<T> clazz)	returns a single instance of the specified class.
<T> T	getSingletonIfExists(SingletonCreator.Creator<T> creator)
boolean	isDestroyed()
<T> T	replaceSingleton(SingletonCreator.Creator<T> creator)

Methods inherited from class java.lang.Object

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

Field Detail

log

public static final org.apache.log4j.Logger log

Constructor Detail

SingletonCreator

public SingletonCreator()

creates a new SingletonCreator instance

Method Detail

getSingleton

public <T> T getSingleton(java.lang.Class<T> clazz)

returns a single instance of the specified class. This is done by calling the newInstance() method on the class object. this method guarantees that only one instance is being created for this SingletonCreator instance. These instances will be cached and returned on subsequent calls of this method. Implementation note: This method implicitly creates a Creator instance and passes this to the getSingleton( Creator ) method. The key of this Creator instance (the getID() method) uses the full qualified class name (Class.getName()) to identify this singleton.

Parameters:

clazz - the Class for which the instance should be created

Returns:

T the singleton instance

getSingleton

public <T> T getSingleton(SingletonCreator.Creator<T> creator)

returns a single instance created by the given Creator. this method guarantees that only one instance is being created for this SingletonCreator instance. These instances will be cached in a Map keyed by the creator.getID() result are and returned on subsequent calls of this method.

Parameters:

creator - the Creator

Returns:

T the singleton instance

replaceSingleton

public <T> T replaceSingleton(SingletonCreator.Creator<T> creator)

getSingletonIfExists

public <T> T getSingletonIfExists(SingletonCreator.Creator<T> creator)

destroy

public void destroy()

destroys this SingletonCreator instance this method will call the destroy() method of each SingletonCreator.Creator instance that was used when calling getSingleton() in reverse order to allow you to cleanup correctly

isDestroyed

public boolean isDestroyed()

clear

public void clear()