/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* 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.arquillian.core.impl.loadable;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.jboss.arquillian.core.api.Injector;
import org.jboss.arquillian.core.spi.ServiceLoader;
/**
* ServiceRegistry
*
* @author <a href="mailto:aslak@redhat.com">Aslak Knutsen</a>
* @author Davide D'Alto
* @version $Revision: $
*/
public class ServiceRegistry {
private final Injector injector;
private final Map<Class<?>, Set<Class<?>>> registry;
private final Map<Class<?>, Set<Class<?>>> vetoed;
public ServiceRegistry(Injector injector, Map<Class<?>, Set<Class<?>>> vetoed) {
this.registry = new HashMap<Class<?>, Set<Class<?>>>();
this.vetoed = new HashMap<Class<?>, Set<Class<?>>>(vetoed);
this.injector = injector;
}
public <T> void addService(Class<T> service, Class<? extends T> serviceImpl) {
synchronized (registry) {
if (isImplementationVetoed(service, serviceImpl)) {
return;
}
Set<Class<?>> registeredImpls = registry.get(service);
if (registeredImpls == null) {
registeredImpls = new HashSet<Class<?>>();
}
registeredImpls.add(serviceImpl);
registry.put(service, registeredImpls);
}
}
public <T> void removeService(Class<T> service, Class<? extends T> serviceImpl) {
synchronized (registry) {
Set<Class<?>> registeredImpls = registry.get(service);
if (registeredImpls == null) {
return;
}
registeredImpls.remove(serviceImpl);
}
}
public <T> void overrideService(Class<T> service, Class<? extends T> oldServiceImpl,
Class<? extends T> newServiceImpl) {
synchronized (registry) {
if (isImplementationVetoed(service, newServiceImpl)) {
return;
}
Set<Class<?>> vetoedImpls = vetoed.get(service);
if (vetoedImpls == null) {
vetoedImpls = new HashSet<Class<?>>();
vetoed.put(service, vetoedImpls);
}
vetoedImpls.add(oldServiceImpl);
removeService(service, oldServiceImpl);
addService(service, newServiceImpl);
}
}
public <T> Set<Class<? extends T>> getServiceImpls(Class<T> service) {
Set<Class<?>> registeredImpls = registry.get(service);
Set<Class<? extends T>> typedImpls = new HashSet<Class<? extends T>>();
if (registeredImpls == null) {
return typedImpls;
}
for (Class<?> registeredImpl : registeredImpls) {
typedImpls.add(registeredImpl.asSubclass(service));
}
return typedImpls;
}
private <T> boolean isImplementationVetoed(Class<?> service, Class<? extends T> serviceImpl) {
Set<Class<?>> vetoedImpls = vetoed.get(service);
return vetoedImpls != null && vetoedImpls.contains(serviceImpl);
}
public void clear() {
registry.clear();
}
public ServiceLoader getServiceLoader() {
return new ServiceRegistryLoader(injector, this);
}
}