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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.core;
import java.util.HashMap;
import java.util.Map;
/**
* Default implementation of a registry to hold all the Tuscany core extension
* points. As the point of contact for all extension artifacts this registry
* allows loaded extensions to find all other parts of the system and
* register themselves appropriately.
*
* @version $Rev$ $Date$
*/
public class DefaultExtensionPointRegistry implements ExtensionPointRegistry {
private Map<Class<?>, Object> extensionPoints = new HashMap<Class<?>, Object>();
/**
* Add an extension point to the registry. This default implementation
* stores extensions against the interfaces that they implement.
* @param extensionPoint The instance of the extension point
*/
public void addExtensionPoint(Object extensionPoint) {
Class[] interfaces = extensionPoint.getClass().getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
extensionPoints.put(interfaces[i], extensionPoint);
}
}
/**
* Get the extension point by the interface that it implements
* @param extensionPointType The lookup key (extension point interface)
* @return The instance of the extension point
*/
public <T> T getExtensionPoint(Class<T> extensionPointType) {
return extensionPointType.cast(extensionPoints.get(extensionPointType));
}
/**
* Remove an extension point based on the interface that it implements
* @param extensionPoint The extension point to remove
*/
public void removeExtensionPoint(Object extensionPoint) {
Class[] interfaces = extensionPoint.getClass().getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
extensionPoints.remove(interfaces[i]);
}
}
}
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