2 * Copyright 2007 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package org.wamblee.system;
18 public interface RequiredInterface {
21 * Name for the interface.
23 public String getName();
26 * Checks if the service is provided by a given provided interface.
27 * @param aInterface Provided interface.
30 boolean implementedBy(ProvidedInterface aInterface);
33 * Sets the provider of this interface.
34 * @param aProvider Provider.
36 void setProvider(ProvidedInterface aProvider);
39 * Getst the provider interface.
40 * @return Provider or null if not set.
42 ProvidedInterface getProvider();
45 * Gets the implementation of the required interface.
47 * @param aClass Interface type.
48 * @return Interface implementation or null if not known yet.
50 <T> T getImplementation(Class<T> aClass);