/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and/or its affiliates, 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.ocpsoft.rewrite.cdi.expressions;
import java.lang.annotation.Annotation;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;
import javax.el.ArrayELResolver;
import javax.el.BeanELResolver;
import javax.el.CompositeELResolver;
import javax.el.ELResolver;
import javax.el.ListELResolver;
import javax.el.MapELResolver;
import javax.el.ResourceBundleELResolver;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.Instance;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
/**
* <p>
* Creates the composite EL Resolver which contains the default EL resolvers,
* the CDI EL resolver and any user registered resolvers.
* </p>
*
* @author Stuart Douglas
*/
public class ELResolverProducer {
@Produces
@Composite
public ELResolver getELResolver(@Resolver Instance<ELResolver> resolvers, BeanManager beanManager) {
// Create the default el resolvers
CompositeELResolver compositeResolver = new CompositeELResolver();
compositeResolver.add(beanManager.getELResolver());
compositeResolver.add(new MapELResolver());
compositeResolver.add(new ListELResolver());
compositeResolver.add(new ArrayELResolver());
compositeResolver.add(new ResourceBundleELResolver());
compositeResolver.add(new BeanELResolver());
boolean isGlassFish = System.getProperty("glassfish.version") != null;
if (isGlassFish) {
for (ELResolver resolver : getReferences(beanManager, ELResolver.class, new ResolverLiteral())) {
compositeResolver.add(resolver);
}
} else {
for (ELResolver resolver : resolvers) {
compositeResolver.add(resolver);
}
}
return compositeResolver;
}
@SuppressWarnings("unchecked")
private <T> Set<T> getReferences(final BeanManager manager, final Class<T> type, Annotation... qualifiers) {
Set<Bean<?>> resolverBeans = manager.getBeans(type, qualifiers);
if (resolverBeans.size() == 0) {
return Collections.emptySet();
}
Set<T> refs = new LinkedHashSet<T>();
for (Bean<?> bean : resolverBeans) {
// FIXME when should the dependent context be cleaned up?
CreationalContext<T> context = (CreationalContext<T>) manager.createCreationalContext(bean);
if (context != null) {
refs.add((T) manager.getReference(bean, type, context));
}
}
return refs;
}
}