Package org.adempiere.base.equinox

Class ExtensionList<T>

java.lang.Object

org.adempiere.base.equinox.ExtensionList<T>

Type Parameters:

T - The service this list holds implementations of.

All Implemented Interfaces:

Iterable<T>

public class ExtensionList<T>
extends Object
implements Iterable<T>

This List looks up services as extensions in equinox.
The extension point must be the class name of the service interface.
The query attributes are checked against the attributes of the extension configuration element.

In order to minimize equinox lookups, a filtering iterator is used.

Author:

viola

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	ExtensionList.ExtensionIterator<E extends T>	Iterator implementation for Equinox extension

Constructor Summary

Constructors

Constructor	Description
ExtensionList(Class<T> clazz, String extensionPointId)
ExtensionList(Class<T> type, String extensionPointId, String extensionId, ServiceQuery query)

Method Summary

Modifier and Type	Method	Description
void	addFilter(String attribute, String value)	add filter for discovery of extensions
List<T>	asList()
T	first()
Iterator<T>	iterator()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

ExtensionList

public ExtensionList(Class<T> clazz,
 String extensionPointId)

Parameters:

clazz -

extensionPointId -

ExtensionList

public ExtensionList(Class<T> type,
 String extensionPointId,
 String extensionId,
 ServiceQuery query)

Parameters:

type -

extensionPointId -

extensionId -

query -

Method Details

iterator

public Iterator<T> iterator()

Specified by:

iterator in interface Iterable<T>

Returns:

Iterator

addFilter

public void addFilter(String attribute,
 String value)

add filter for discovery of extensions

Parameters:

attribute -

value -

first

public T first()

Returns:

first matching extension

asList

public List<T> asList()

Returns:

list of matching extension