/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.config.inject;
import java.io.Closeable;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.HashSet;
import java.util.Set;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Annotated;
import javax.enterprise.inject.spi.InjectionPoint;
/**
* SingletonBean represents a singleton instance exported as a web beans.
*
* <code><pre>
* @Current Manager manager;
*
* manager.addBean(new SingletonBean(myValue));
* </pre></code>
*/
public class SingletonBean<T> extends AbstractSingletonBean<T>
implements Closeable
{
private static final Set<InjectionPoint> EMPTY_INJECTION_POINTS
= new HashSet<InjectionPoint>();
private T _value;
SingletonBean(ManagedBeanImpl<T> managedBean,
Set<Type> types,
Annotated annotated,
Set<Annotation> bindings,
Set<Class<? extends Annotation>> stereotypes,
Class<? extends Annotation> scopeType,
String name,
T value)
{
super(managedBean, types, annotated, bindings,
stereotypes, scopeType, name);
_value = value;
if (value instanceof HandleAware) {
HandleAware handleAware = (HandleAware) value;
String id = getId();
if (id != null)
handleAware.setSerializationHandle(new SingletonHandle(id));
}
}
@Override
public T create(CreationalContext<T> env)
{
return _value;
}
@Override
public Set<InjectionPoint> getInjectionPoints()
{
return EMPTY_INJECTION_POINTS;
}
/**
* Frees the singleton on environment shutdown
*/
@Override
public void close()
{
if (_value != null) {
CreationalContext<T> env = null;
destroy(_value, env);
}
}
}