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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;
/**
* The extension point for the Tuscany core utility extensions.
*
* @version $Rev$ $Date$
* @tuscany.spi.extension.asclient
*/
public interface UtilityExtensionPoint extends LifeCycleListener {
/**
* Add a utility to the extension point
* @param utility The instance of the utility
*
* @throws IllegalArgumentException if utility is null
*/
void addUtility(Object utility);
/**
* Add a utility to the extension point for a given key
* @param utility The instance of the utility
*
* @throws IllegalArgumentException if utility is null
*/
void addUtility(Object key, Object utility);
/**
* Get the utility by the interface
* @param utilityType The lookup key (utility interface)
* @return The instance of the utility
*
* @throws IllegalArgumentException if utilityType is null
*/
<T> T getUtility(Class<T> utilityType);
/**
* Get an instance of the utility by the interface and key
* @param utilityType The lookup key (utility interface)
* @param key A key associated with the utility, if it is null,
* then the utilityType is used as the key
* @return The instance of the utility
*
* @throws IllegalArgumentException if utilityType is null
*/
<T> T getUtility(Class<T> utilityType, Object key);
/**
* Remove a utility
* @param utility The utility to remove
*
* @throws IllegalArgumentException if utility is null
*/
void removeUtility(Object utility);
}
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