Package org.eclipse.epsilon.common.dt.extensions

Class ClassBasedExtension

java.lang.Object

org.eclipse.epsilon.common.dt.extensions.ClassBasedExtension

public class ClassBasedExtension
extends Object

Class which looks up and creates the instances of the classes referred to through the specified extension point. The extension point must declare an attribute of type "java" and name CLASS_PROPERTY. Referenced classes should implement a certain interface or inherit from a certain class.

Version:

1.0

Author:

Antonio García-Domínguez

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CLASS_PROPERTY

Constructor Summary

Constructors

Constructor	Description
ClassBasedExtension(org.eclipse.core.runtime.IConfigurationElement configElement, Class<?> expectedClass)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
Object	createInstance()	Instantiates the referenced class.
String	getClassName()	Returns the fully qualified class name of the referenced class, as set in the extension.
static <T> List<T>	getImplementations(String extensionPointID, Class<T> expectedClass)	Returns a list with instances of the classes registered in the available extensions for this extension point.
static List<ClassBasedExtension>	getInstances(String extensionPointID, Class<?> expectedClass)	Returns a list with the available extensions for this extension point.

Methods inherited from class java.lang.Object

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

Field Details

CLASS_PROPERTY

public static final String CLASS_PROPERTY

See Also:

• Constant Field Values

Constructor Details

ClassBasedExtension

public ClassBasedExtension(org.eclipse.core.runtime.IConfigurationElement configElement,
 Class<?> expectedClass)

Creates a new instance.

Parameters:

configElement - Configuration element from the extension element.

expectedClass - Superclass or interface to which the referenced class should comply.

Method Details

getInstances

public static List<ClassBasedExtension> getInstances(String extensionPointID,
 Class<?> expectedClass)

Returns a list with the available extensions for this extension point.

getImplementations

public static <T> List<T> getImplementations(String extensionPointID,
 Class<T> expectedClass)
                                      throws IllegalExtensionException

Returns a list with instances of the classes registered in the available extensions for this extension point.

Throws:

IllegalExtensionException

getClassName

public String getClassName()

Returns the fully qualified class name of the referenced class, as set in the extension.

createInstance

public Object createInstance()
                      throws IllegalExtensionException

Instantiates the referenced class.

Throws:

IllegalExtensionException