org.objectweb.fractal.julia.factory
Class SingletonTemplateMixin

java.lang.Object
  org.objectweb.fractal.julia.factory.SingletonTemplateMixin

All Implemented Interfaces:

Factory, Template

public abstract class SingletonTemplateMixin
extends Object
implements Template

Provides a singleton behavior to a Template. A singleton composite template must only contain other singleton templates, otherwise the "singleton" semantics will not be ensured.

Requirements

• none.

Field Summary

Component

fcInstance The singleton instance created by this template.

Method Summary

abstract Component	_super_newFcControllerInstance() The newFcControllerInstance overriden by this mixin.
Component	newFcControllerInstance() Calls the overriden method only if the fcInstance field is null.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.objectweb.fractal.api.factory.Factory

getFcContentDesc, getFcControllerDesc, getFcInstanceType, newFcInstance

Field Detail

fcInstance

public Component fcInstance

The singleton instance created by this template.

Method Detail

newFcControllerInstance

public Component newFcControllerInstance()
                                  throws InstantiationException

Calls the overriden method only if the fcInstance field is null.

Specified by:

newFcControllerInstance in interface Template

Returns:

the instantiated component.

Throws:

InstantiationException - if the component controller cannot be instantiated.

_super_newFcControllerInstance

public abstract Component _super_newFcControllerInstance()
                                                  throws InstantiationException

The newFcControllerInstance overriden by this mixin.

Returns:

the instantiated component.

Throws:

InstantiationException - if the component controller cannot be instantiated.