Package com.bc.ceres.core

Class ExtensionManager

java.lang.Object

com.bc.ceres.core.ExtensionManager

public abstract class ExtensionManager
extends Object

The ExtensionManager is a service used to register and unregister ExtensionFactorys with a given type of an extensible object.

See Also:

Extensible, ExtensibleObject

Constructor Summary

Constructors

Constructor	Description
ExtensionManager()

Method Summary

Modifier and Type	Method	Description
<E> E	getExtension(Object extensibleObject, Class<E> extensionType)	Gets a dynamic extension for the given (extensible) object.
abstract ExtensionFactory[]	getExtensionFactories(Class<?> extensibleType)	Gets all extension factories registered for the given type.
static ExtensionManager	getInstance()
abstract void	register(Class<?> extensibleType, ExtensionFactory factory)	Registers an extension factory for the given extensible type.
static void	setInstance(ExtensionManager instance)
abstract void	unregister(Class<?> extensibleType, ExtensionFactory factory)	Unregisters an extension factory for the given extensible type.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtensionManager

public ExtensionManager()

Method Detail

getInstance

public static ExtensionManager getInstance()

Returns:

The service instance.

setInstance

public static void setInstance(ExtensionManager instance)

Parameters:

instance - The service instance.

register

public abstract void register(Class<?> extensibleType,
                              ExtensionFactory factory)

Registers an extension factory for the given extensible type.

Parameters:

extensibleType - The extensible type.

factory - The factory.

unregister

public abstract void unregister(Class<?> extensibleType,
                                ExtensionFactory factory)

Unregisters an extension factory for the given extensible type.

Parameters:

extensibleType - The extensible type.

factory - The factory.

getExtensionFactories

public abstract ExtensionFactory[] getExtensionFactories(Class<?> extensibleType)

Gets all extension factories registered for the given type.

Parameters:

extensibleType - The extensible type.

Returns:

The list of extension factories. May be empty.

getExtension

public <E> E getExtension(Object extensibleObject,
                          Class<E> extensionType)

Gets a dynamic extension for the given (extensible) object.

Parameters:

extensibleObject - The (extensible) object.

extensionType - The type of the requested extension.

Returns:

The extension instance, or null if the given object is not extensible by this factory or if the factory fails to provide that extension.

See Also:

ExtensionFactory.getExtension(Object, Class)