net.sourceforge.groboutils.util.classes.v1
Class SingletonStore

java.lang.Object
  net.sourceforge.groboutils.util.classes.v1.AbstractSingleStore
      net.sourceforge.groboutils.util.classes.v1.SingletonStore

public class SingletonStore

extends AbstractSingleStore

Aids pluggable factories and related classes by being a central repository for storing a singleton, and creating means to load and change the singleton.

Since:

March 30, 2002

Version:

$Date: 2003/02/10 22:52:36 $

Author:

Matt Albrecht groboclown@users.sourceforge.net

Constructor Summary

SingletonStore(java.lang.Class instanceOf, java.lang.Class defaultImpl, java.lang.String sysPropertyKey)
Constructor specifying all the parameters for using a singleton in this framework.

Method Summary

void	setDefaultSingleton() Sets the inner singleton to the default, which pulls from the system property key.
void	setSingletonFromProperty(java.lang.String key) Set the singleton to the class specified in the given system property; if the class is invalid, then the default singleton class will be used instead.

Methods inherited from class net.sourceforge.groboutils.util.classes.v1.AbstractSingleStore

createFromProperty, getSingleton, setSingleton

Methods inherited from class java.lang.Object

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

Constructor Detail

SingletonStore

public SingletonStore(java.lang.Class instanceOf,
                      java.lang.Class defaultImpl,
                      java.lang.String sysPropertyKey)

Constructor specifying all the parameters for using a singleton in this framework.

Parameters:

instanceOf - singletons must be of this class.

defaultImpl - the class which will be used if no valid implementation class can be found.

sysPropertyKey - the system property key to reference for the name of the implementation class.

Method Detail

setDefaultSingleton

public void setDefaultSingleton()

Sets the inner singleton to the default, which pulls from the system property key.

Specified by:

setDefaultSingleton in class AbstractSingleStore

setSingletonFromProperty

public void setSingletonFromProperty(java.lang.String key)

Set the singleton to the class specified in the given system property; if the class is invalid, then the default singleton class will be used instead.

Parameters:

key - the System property to reference for the classname to instantiate. It is passed to ClassLoadHelper

Throws:

java.lang.IllegalArgumentException - if key is null.

See Also:

ClassLoadHelper.createObjectFromProperty( String, Class, boolean )