/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.myfaces.extensions.cdi.scripting.impl;
import org.apache.myfaces.extensions.cdi.scripting.api.language.Language;
import org.apache.myfaces.extensions.cdi.scripting.api.LanguageManager;
import org.apache.myfaces.extensions.cdi.scripting.impl.spi.LanguageBean;
import static org.apache.myfaces.extensions.cdi.scripting.impl.util.ExceptionUtils.noScriptingLanguageAvailable;
import static org.apache.myfaces.extensions.cdi.scripting.impl.util.ExceptionUtils.noScriptingLanguageAvailableFor;
import static org.apache.myfaces.extensions.cdi.scripting.impl.util.ExceptionUtils.ambiguousLanguageDefinition;
import org.apache.myfaces.extensions.cdi.core.api.provider.BeanManagerProvider;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.context.spi.CreationalContext;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* @author Gerhard Petracek
*/
public class DefaultLanguageManager implements LanguageManager
{
private ConcurrentHashMap<Class<? extends Language>, Language> languageCache;
protected DefaultLanguageManager()
{
}
public String getLanguageName(Class<? extends Language> languageType)
{
lazyInitCache();
Language language = this.languageCache.get(languageType);
if(language == null)
{
throw noScriptingLanguageAvailableFor(languageType);
}
return language.getName();
}
private synchronized void lazyInitCache()
{
if(languageCache != null)
{
return;
}
languageCache = new ConcurrentHashMap<Class<? extends Language>, Language>();
BeanManager beanManager = BeanManagerProvider.getInstance().getBeanManager();
Set<? extends Bean> foundBeans = beanManager.getBeans(LanguageBean.class);
if (foundBeans.isEmpty())
{
throw noScriptingLanguageAvailable();
}
CreationalContext<LanguageBean> creationalContext;
LanguageBean currentBean;
for(Bean<LanguageBean> languageBean : foundBeans)
{
creationalContext = beanManager.createCreationalContext(languageBean);
currentBean = languageBean.create(creationalContext);
if(this.languageCache.containsKey(currentBean.getId()))
{
throw ambiguousLanguageDefinition(
currentBean.getId(),this.languageCache.get(currentBean.getId()), currentBean);
}
this.languageCache.put(currentBean.getId(), currentBean);
}
}
}