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Diffstat (limited to 'sca-java-1.x/branches/sca-java-0.91/modules/core-spi/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-0.91/modules/core-spi/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-0.91/modules/core-spi/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java b/sca-java-1.x/branches/sca-java-0.91/modules/core-spi/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java new file mode 100644 index 0000000000..7a42300098 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-0.91/modules/core-spi/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java @@ -0,0 +1,69 @@ +/* + * 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]); + } + } + +} |