| // Copyright 2007, 2008, 2010 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.internal.services; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.tapestry5.Translator; |
| import org.apache.tapestry5.ioc.internal.util.CollectionFactory; |
| import org.apache.tapestry5.ioc.util.AvailableValues; |
| import org.apache.tapestry5.ioc.util.StrategyRegistry; |
| import org.apache.tapestry5.ioc.util.UnknownValueException; |
| import org.apache.tapestry5.services.InvalidationListener; |
| import org.apache.tapestry5.services.TranslatorSource; |
| |
| @SuppressWarnings("unchecked") |
| public class TranslatorSourceImpl implements TranslatorSource, InvalidationListener |
| { |
| private final Map<String, Translator> nameToTranslator = CollectionFactory.newCaseInsensitiveMap(); |
| |
| private final StrategyRegistry<Translator> registry; |
| |
| private static final Map<String, Translator> EMPTY = Collections.emptyMap(); |
| |
| public TranslatorSourceImpl(Map<Class, Translator> configuration) |
| { |
| this(configuration, EMPTY); |
| } |
| |
| public TranslatorSourceImpl(Map<Class, Translator> configuration, Map<String, Translator> alternates) |
| { |
| for (Map.Entry<Class, Translator> me : configuration.entrySet()) |
| { |
| Class type = me.getKey(); |
| Translator translator = me.getValue(); |
| |
| if (!type.equals(translator.getType())) |
| throw new RuntimeException( |
| String |
| .format( |
| "Contributed translator for type %s reports its type as %s. Please change the contribution so that the key matches that translator type.", |
| type.getName(), translator.getType().getName())); |
| |
| String name = translator.getName(); |
| |
| if (nameToTranslator.containsKey(name)) |
| throw new RuntimeException( |
| String |
| .format( |
| "Two different Translators contributed to the TranslatorSource service use the same translator name: '%s'. Translator names must be unique.", |
| name)); |
| |
| nameToTranslator.put(name, translator); |
| } |
| |
| for (String name : alternates.keySet()) |
| { |
| if (nameToTranslator.containsKey(name)) |
| throw new RuntimeException( |
| String |
| .format( |
| "Translator '%s' contributed to the TranslatorAlternatesSource service has the same name as a standard Translator contributed to the TranslatorSource service.", |
| name)); |
| |
| nameToTranslator.put(name, alternates.get(name)); |
| } |
| |
| registry = StrategyRegistry.newInstance(Translator.class, configuration, true); |
| } |
| |
| public Translator get(String name) |
| { |
| Translator result = nameToTranslator.get(name); |
| |
| if (result == null) |
| throw new UnknownValueException(String.format("Unknown translator type '%s'.", name), new AvailableValues( |
| "Configured translators", nameToTranslator)); |
| |
| return result; |
| } |
| |
| public Translator getByType(Class valueType) |
| { |
| Translator result = registry.get(valueType); |
| |
| if (result == null) |
| { |
| List<String> names = CollectionFactory.newList(); |
| |
| for (Class type : registry.getTypes()) |
| { |
| names.add(type.getName()); |
| } |
| |
| throw new IllegalArgumentException(ServicesMessages.noTranslatorForType(valueType, names)); |
| } |
| |
| return result; |
| } |
| |
| public Translator findByType(Class valueType) |
| { |
| return registry.get(valueType); |
| } |
| |
| public void objectWasInvalidated() |
| { |
| registry.clearCache(); |
| } |
| } |