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

java.lang.Object
  net.sourceforge.groboutils.util.classes.v1.AbstractMultipleStore
      net.sourceforge.groboutils.util.classes.v1.SPISingletonStore

public class SPISingletonStore

extends AbstractMultipleStore

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

This uses the same pattern as the SingletonStore class, but this one allows for multiple singleton instances, and loads them from the SPILoader class.

Since:

June 28, 2002

Version:

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

Author:

Matt Albrecht groboclown@users.sourceforge.net

See Also:

SingletonStore

Nested Class Summary

Nested classes inherited from class net.sourceforge.groboutils.util.classes.v1.AbstractMultipleStore

AbstractMultipleStore.AllowMultiplesAction

Field Summary

Fields inherited from class net.sourceforge.groboutils.util.classes.v1.AbstractMultipleStore

MULTIPLES_OK, NO_MULTIPLES_ERROR, NO_MULTIPLES_SILENT

Constructor Summary

SPISingletonStore(java.lang.Class instanceOf, AbstractMultipleStore.AllowMultiplesAction ama)
Constructor specifying all the parameters for using a singleton in this framework.

Method Summary

protected void	addDefaultSingletons() Adds the default inner singletons, which is an implementation specific method.
void	addSPI(java.lang.ClassLoader cl) Add a set of SPIs from the given class loader.

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

addSingleton, getSingletons

Methods inherited from class java.lang.Object

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

Constructor Detail

SPISingletonStore

public SPISingletonStore(java.lang.Class instanceOf,
                         AbstractMultipleStore.AllowMultiplesAction ama)

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

Parameters:

instanceOf - singletons must be of this class. This is also used to load the SPI classes.

ama - true if this store should allow multiple instances of the exact same class, or false if it should prevent multiple instances sharing the exact same class. This helps to enforce the idea of 'singleton'.

Method Detail

addDefaultSingletons

protected void addDefaultSingletons()

Adds the default inner singletons, which is an implementation specific method.

Specified by:

addDefaultSingletons in class AbstractMultipleStore

addSPI

public void addSPI(java.lang.ClassLoader cl)
            throws java.io.IOException

Add a set of SPIs from the given class loader.

Throws:

java.io.IOException