/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.jboss.cdi.tck.util;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.Set;
import javax.enterprise.context.Dependent;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.UnsatisfiedResolutionException;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.util.TypeLiteral;
/**
* Simple helper class for contextual reference lookup.
*
* @author Martin Kouba
*/
public final class BeanLookupUtils {
private static final SimpleLogger logger = new SimpleLogger(BeanLookupUtils.class);
private BeanLookupUtils() {
}
/**
*
* @param beanManager
* @param beanType
* @param qualifiers
* @return
*/
public static <T> T getContextualReference(BeanManager beanManager, Class<T> beanType, Annotation... qualifiers) {
Set<Bean<?>> beans = getBeans(beanManager, beanType, qualifiers);
return getContextualReference(beanManager, beanType, beans);
}
/**
*
* @param beanManager
* @param beanTypeLiteral
* @param qualifiers
* @return
*/
public static <T> T getContextualReference(BeanManager beanManager, TypeLiteral<T> beanTypeLiteral,
Annotation... qualifiers) {
Type beanType = beanTypeLiteral.getType();
Set<Bean<?>> beans = getBeans(beanManager, beanType, qualifiers);
return getContextualReference(beanManager, beanType, beans);
}
/**
*
* @param beanManager
* @param beanType
* @param name
* @return
*/
public static <T> T getContextualReference(BeanManager beanManager, String name, Class<T> beanType) {
Set<Bean<?>> beans = beanManager.getBeans(name);
if (beans == null || beans.isEmpty()) {
return null;
}
return getContextualReference(beanManager, beanType, beans);
}
private static Set<Bean<?>> getBeans(BeanManager beanManager, Type beanType, Annotation... qualifiers) {
Set<Bean<?>> beans = beanManager.getBeans(beanType, qualifiers);
if (beans == null || beans.isEmpty()) {
throw new UnsatisfiedResolutionException(String.format(
"No bean matches required type %s and required qualifiers %s", beanType, Arrays.toString(qualifiers)));
}
return beans;
}
@SuppressWarnings("unchecked")
private static <T> T getContextualReference(BeanManager beanManager, Type beanType, Set<Bean<?>> beans) {
Bean<?> bean = beanManager.resolve(beans);
if (bean.getScope().equals(Dependent.class)) {
logger.log("Dependent contextual instance cannot be properly destroyed!");
}
CreationalContext<?> creationalContext = beanManager.createCreationalContext(bean);
return ((T) beanManager.getReference(bean, beanType, creationalContext));
}
}