001// Copyright 2007, 2008, 2010, 2012 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 java.util.Map;
018
019import org.apache.tapestry5.ValueEncoder;
020import org.apache.tapestry5.ioc.annotations.PostInjection;
021import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
022import org.apache.tapestry5.ioc.util.StrategyRegistry;
023import org.apache.tapestry5.services.*;
024
025@SuppressWarnings("all")
026public class ValueEncoderSourceImpl implements ValueEncoderSource, Runnable
027{
028    private final StrategyRegistry<ValueEncoderFactory> registry;
029
030    private final Map<Class, ValueEncoder> cache = CollectionFactory.newConcurrentMap();
031
032    public ValueEncoderSourceImpl(Map<Class, ValueEncoderFactory> configuration)
033    {
034        registry = StrategyRegistry.newInstance(ValueEncoderFactory.class, configuration);
035    }
036
037    @PostInjection
038    public void setupInvalidation(@ComponentClasses InvalidationEventHub hub) {
039        hub.addInvalidationCallback(this);
040    }
041
042    @SuppressWarnings({"unchecked"})
043    public <T> ValueEncoder<T> getValueEncoder(Class<T> type)
044    {
045        assert type != null;
046        ValueEncoder<T> result = cache.get(type);
047
048        if (result == null)
049        {
050            ValueEncoderFactory<T> factory = registry.get(type);
051
052            result = factory.create(type);
053
054            cache.put(type, result);
055        }
056
057        return result;
058    }
059
060    public void run()
061    {
062        registry.clearCache();
063        cache.clear();
064    }
065}