001// Copyright 2007 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.services.ApplicationStatePersistenceStrategy;
018import org.apache.tapestry5.services.ApplicationStatePersistenceStrategySource;
019
020import java.util.Map;
021
022public class ApplicationStatePersistenceStrategySourceImpl implements
023        ApplicationStatePersistenceStrategySource
024{
025    private final Map<String, ApplicationStatePersistenceStrategy> configuration;
026
027    public ApplicationStatePersistenceStrategySourceImpl(Map<String, ApplicationStatePersistenceStrategy> configuration)
028    {
029        this.configuration = configuration;
030    }
031
032    public ApplicationStatePersistenceStrategy get(String name)
033    {
034        ApplicationStatePersistenceStrategy result = configuration.get(name);
035
036        if (result == null)
037            throw new RuntimeException(ServicesMessages.missingApplicationStatePersistenceStrategy(
038                    name,
039                    configuration.keySet()));
040
041        return result;
042    }
043}