// Copyright 2006 The Apache Software Foundation | |
// | |
// Licensed 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.tapestry5.ioc.services; | |
import org.apache.tapestry5.ioc.util.StrategyRegistry; | |
/** | |
* A service implementation builder that operates around a {@link StrategyRegistry}, implementing a version of the Gang | |
* of Four Strategy pattern. | |
* <p/> | |
* The constructed service is configured with a number of adapters (that implement the same service interface). Method | |
* invocations on the service are routed to one of the adapters. | |
* <p/> | |
* The first parameter of each method is used to select the appropriate adapter. | |
* <p/> | |
* The ideal interface for use with this builder has only one method. | |
*/ | |
public interface StrategyBuilder | |
{ | |
/** | |
* Given a number of adapters implementing the service interface, builds a "dispatcher" implementations that | |
* delegates to the one of the adapters. It is an error if any of the methods takes no parameters. | |
* | |
* @param <S> the service interface type | |
* @param registry defines the adapters based on parameter type (of the first parameter) | |
* @return a service implementation | |
*/ | |
<S> S build(StrategyRegistry<S> registry); | |
} |