/
NameBasedResolver.java
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/
NameBasedResolver.java
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/*
* JBoss, Home of Professional Open Source
* Copyright 2008, 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.weld.resolution;
import static org.jboss.weld.util.cache.LoadingCacheUtils.getCacheValue;
import java.util.HashSet;
import java.util.Set;
import javax.enterprise.inject.spi.Bean;
import org.jboss.weld.bootstrap.SpecializationAndEnablementRegistry;
import org.jboss.weld.manager.BeanManagerImpl;
import org.jboss.weld.util.Beans;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
/**
* Implementation of name based bean resolution
*
* @author Pete Muir
*/
public class NameBasedResolver {
private static class NameToBeanSet extends CacheLoader<String, Set<Bean<?>>> {
private final BeanManagerImpl beanManager;
private final Iterable<? extends Bean<?>> allBeans;
private final SpecializationAndEnablementRegistry registry;
private NameToBeanSet(BeanManagerImpl beanManager, Iterable<? extends Bean<?>> allBeans) {
this.beanManager = beanManager;
this.allBeans = allBeans;
this.registry = beanManager.getServices().get(SpecializationAndEnablementRegistry.class);
}
public Set<Bean<?>> load(String from) {
Set<Bean<?>> matchedBeans = new HashSet<Bean<?>>();
for (Bean<?> bean : allBeans) {
if ((bean.getName() == null && from == null) || (bean.getName() != null && bean.getName().equals(from))) {
matchedBeans.add(bean);
}
}
return Beans.removeDisabledBeans(matchedBeans, beanManager, registry);
}
}
// The resolved names
private LoadingCache<String, Set<Bean<?>>> resolvedNames;
/**
* Constructor
*/
public NameBasedResolver(BeanManagerImpl manager, Iterable<? extends Bean<?>> allBeans) {
this.resolvedNames = CacheBuilder.newBuilder().build(new NameToBeanSet(manager, allBeans));
}
/**
* Reset all cached injection points. You must reset all cached injection
* points when you add a bean to the manager
*/
public void clear() {
this.resolvedNames.invalidateAll();
}
/**
* Get the possible beans for the given name
*
* @param name The name to match
* @return The set of matching beans
*/
public Set<Bean<?>> resolve(final String name) {
return getCacheValue(resolvedNames, name);
}
/**
* Gets a string representation
*
* @return A string representation
*/
@Override
public String toString() {
StringBuilder buffer = new StringBuilder();
buffer.append("Resolver\n");
buffer.append("Resolved names points: " + resolvedNames.size() + "\n");
return buffer.toString();
}
}