/*
* JBoss, Home of Professional Open Source
* Copyright 2010, 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.environment.servlet.inject;
import java.util.Map;
import java.util.WeakHashMap;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.InjectionTarget;
import org.jboss.weld.manager.api.WeldManager;
import org.jboss.weld.util.Preconditions;
/**
* Provides support for Weld injection into servlets, servlet filters etc.
*
* @author Pete Muir
* @author <a href="mailto:matija.mazi@gmail.com">Matija Mazi</a>
* @author Ales Justin
*/
public abstract class AbstractInjector {
private final WeldManager manager;
private final Map<Class<?>, InjectionTarget<?>> cache = new WeakHashMap<Class<?>, InjectionTarget<?>>();
protected AbstractInjector(WeldManager manager) {
Preconditions.checkArgumentNotNull(manager, "manager");
this.manager = manager;
}
protected void inject(Object instance) {
// not data-race safe, however doesn't matter, as the injection target created for class A is interchangeable for another injection target created for class A
// TODO Make this a concurrent cache when we switch to google collections
Class<?> clazz = instance.getClass();
if (!cache.containsKey(clazz)) {
cache.put(clazz, manager.createInjectionTarget(manager.createAnnotatedType(clazz)));
}
CreationalContext<Object> cc = manager.createCreationalContext(null);
InjectionTarget<Object> it = (InjectionTarget<Object>) cache.get(clazz);
it.inject(instance, cc);
}
public void destroy(Object instance) {
if (instance != null) {
AnnotatedType type = manager.createAnnotatedType(instance.getClass());
InjectionTarget it = manager.createInjectionTarget(type);
it.dispose(instance);
}
}
}