org.apache.commons.discovery.tools
Class DefaultClassHolder<T>

java.lang.Object
  org.apache.commons.discovery.tools.DefaultClassHolder<T>

public class DefaultClassHolder<T>
extends Object

Holder for a default class. Class may be specified by name (String) or class (Class). Using the holder complicates the users job, but minimized # of API's.

Constructor Summary

DefaultClassHolder(Class<S> defaultClass)
Creates a new holder implementation given the input SPI implementation/extension class.

DefaultClassHolder(String defaultName)
Creates a new holder implementation given the input SPI implementation/extension class name.

Method Summary

<S extends T> Class<S>	getDefaultClass(SPInterface<T> spi, ClassLoaders loaders) Returns the default class, loading it if necessary and verifying that it implements the SPI (this forces the check, no way out..).
String	getDefaultName() Returns the hold class name.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultClassHolder

public DefaultClassHolder(Class<S> defaultClass)

Creates a new holder implementation given the input SPI implementation/extension class.

Type Parameters:

S - Any type extends the SPI type

Parameters:

defaultClass - The hold class

DefaultClassHolder

public DefaultClassHolder(String defaultName)

Creates a new holder implementation given the input SPI implementation/extension class name.

Parameters:

defaultName - The hold class name

Method Detail

getDefaultClass

public <S extends T> Class<S> getDefaultClass(SPInterface<T> spi,
                                              ClassLoaders loaders)

Returns the default class, loading it if necessary and verifying that it implements the SPI (this forces the check, no way out..).

Type Parameters:

S - Any type extends the SPI type

Parameters:

spi - non-null SPI

loaders - Used only if class needs to be loaded.

Returns:

The default Class.

getDefaultName

public String getDefaultName()

Returns the hold class name.

Returns:

The hold class name