package act.inject.param;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import act.Destroyable;
import act.app.AppServiceBase;
import act.inject.DependencyInjector;
import act.inject.genie.GenieInjector;
import act.util.ActContext;
import act.util.DestroyableBase;
import act.util.SingletonBase;
import org.osgl.inject.BeanSpec;
import javax.enterprise.context.ApplicationScoped;
import javax.inject.Singleton;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
public class ProvidedValueLoader extends DestroyableBase implements ParamValueLoader {
private DependencyInjector<?> injector;
private BeanSpec beanSpec;
private Object singleton;
private ProvidedValueLoader(BeanSpec beanSpec, DependencyInjector<?> injector) {
Class type = beanSpec.rawType();
if (AppServiceBase.class.isAssignableFrom(type)
|| SingletonBase.class.isAssignableFrom(type)
|| type.isAnnotationPresent(Singleton.class)
|| type.isAnnotationPresent(ApplicationScoped.class)) {
singleton = injector.get(type);
}
this.beanSpec = beanSpec;
this.injector = injector;
}
@Override
public Object load(Object bean, ActContext<?> context, boolean noDefaultValue) {
if (null != singleton) {
return singleton;
}
if (null != context && context.getClass().equals(beanSpec.rawType())) {
return context;
} else {
GenieInjector genieInjector = (GenieInjector) injector;
return genieInjector.get(beanSpec);
}
}
@Override
public String bindName() {
return beanSpec.name();
}
@Override
protected void releaseResources() {
Destroyable.Util.tryDestroy(singleton);
singleton = null;
injector = null;
lookup.clear();
}
private static ConcurrentMap<BeanSpec, ProvidedValueLoader> lookup = new ConcurrentHashMap<BeanSpec, ProvidedValueLoader>();
public static ProvidedValueLoader get(BeanSpec beanSpec, DependencyInjector<?> injector) {
ProvidedValueLoader loader = lookup.get(beanSpec);
if (null == loader) {
loader = new ProvidedValueLoader(beanSpec, injector);
lookup.putIfAbsent(beanSpec, loader);
}
return loader;
}
}