org.cripac.isee.vpe.util

Class Singleton<T>

java.lang.Object

org.cripac.isee.vpe.util.Singleton<T>

Type Parameters:

T - The type of the object.

All Implemented Interfaces:

java.io.Serializable

public class Singleton<T>
extends java.lang.Object
implements java.io.Serializable

The class Singleton manages singletons of any types.

Author:

Ken Yu, CRIPAC, 2016

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Singleton(Factory<T> objFactory) Create a singleton of specified class T, and do not update the instance by default.
Singleton(Factory<T> objFactory, boolean toUpdateInstance) Create a singleton manager of specified class T.

Method Summary

Modifier and Type	Method and Description
T	getInst() Get an instance of class T.

Methods inherited from class java.lang.Object

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

Constructor Detail

Singleton

public Singleton(Factory<T> objFactory)
          throws java.lang.Exception

Create a singleton of specified class T, and do not update the instance by default.

Parameters:

objFactory - Factory to create new instance of class T when instance of it does not exist.

Throws:

java.lang.Exception - On failure creating a new instance.

Singleton

public Singleton(Factory<T> objFactory,
                 boolean toUpdateInstance)
          throws java.lang.Exception

Create a singleton manager of specified class T.

Parameters:

objFactory - Factory to create new instance of class T when instance of it does not exist.

toUpdateInstance - Whether to update the instance in the pool on create of this singleton object.

Throws:

java.lang.Exception - On failure creating a new instance.

Method Detail

getInst

public T getInst()
          throws java.lang.Exception

Get an instance of class T.

Returns:

A singleton instance.

Throws:

java.lang.Exception - On failure creating a new instance.