| // Copyright 2007, 2008 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.tapestry.internal.services; |
| |
| import org.apache.tapestry.ValueEncoder; |
| import org.apache.tapestry.internal.events.InvalidationListener; |
| import org.apache.tapestry.ioc.internal.util.CollectionFactory; |
| import org.apache.tapestry.ioc.internal.util.Defense; |
| import org.apache.tapestry.ioc.util.StrategyRegistry; |
| import org.apache.tapestry.services.ValueEncoderFactory; |
| import org.apache.tapestry.services.ValueEncoderSource; |
| |
| import java.util.Map; |
| |
| public class ValueEncoderSourceImpl implements ValueEncoderSource, InvalidationListener |
| { |
| private final StrategyRegistry<ValueEncoderFactory> registry; |
| |
| private final Map<Class, ValueEncoder> cache = CollectionFactory.newConcurrentMap(); |
| |
| public ValueEncoderSourceImpl(Map<Class, ValueEncoderFactory> configuration) |
| { |
| registry = StrategyRegistry.newInstance(ValueEncoderFactory.class, configuration); |
| } |
| |
| @SuppressWarnings({ "unchecked" }) |
| public <T> ValueEncoder<T> getValueEncoder(Class<T> type) |
| { |
| Defense.notNull(type, "type"); |
| |
| ValueEncoder<T> result = cache.get(type); |
| |
| if (result == null) |
| { |
| ValueEncoderFactory<T> factory = registry.get(type); |
| |
| result = factory.create(type); |
| |
| cache.put(type, result); |
| } |
| |
| return result; |
| } |
| |
| public void objectWasInvalidated() |
| { |
| registry.clearCache(); |
| cache.clear(); |
| } |
| } |