// 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();
}
}