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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
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* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
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* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
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* and therefore, elected the GPL Version 2 license, then the option applies
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*/
package com.sun.enterprise.iiop.security;
import java.lang.ref.WeakReference;
import org.glassfish.enterprise.iiop.api.GlassFishORBHelper;
import org.glassfish.gms.bootstrap.GMSAdapterService;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.internal.api.Globals;
import javax.inject.Inject;
import javax.inject.Provider;
/**
* This class is a local utility class to provide for hk2 lookups during runtime.
* @author Sudarsan Sridhar
*/
public class Lookups {
@Inject
private Provider securityMechanismSelectorProvider;
@Inject
private Provider glassFishORBHelperProvider;
@Inject
private Provider securityContextUtilProvider;
@Inject
private Provider gmsAdapterServiceProvider;
/**
* Static singleton {@link Habitat} instance.
*/
private static final ServiceLocator habitat = Globals.getDefaultHabitat();
/**
* Static singleton {@link Lookups} instance. Note that this is assigned lazily and may
* remain null if the {@link Habitat} can not be obtained.
*/
private static Lookups singleton;
private static WeakReference sms = new WeakReference(null);
private static WeakReference orb = new WeakReference(null);
private static WeakReference sc = new WeakReference(null);
private Lookups() {
}
/**
* Check to see if the singleton {@link Lookups} reference has been assigned. If null,
* then attempt to obtain and assign the singleton {@link Lookups} instance.
*
* @return true if the singleton instance has been successfully assigned; false otherwise
*/
private static synchronized boolean checkSingleton(){
if (singleton == null && habitat != null) {
// Obtaining the singleton through the habitat will cause the injections to occur.
singleton = habitat.create(Lookups.class);
habitat.inject(singleton);
habitat.postConstruct(singleton);
}
return singleton != null;
}
/**
* Get the {@link SecurityMechanismSelector}.
*
* @return the {@link SecurityMechanismSelector}; null if not available
*/
static SecurityMechanismSelector getSecurityMechanismSelector() {
if (sms.get() != null) {
return sms.get();
}
return _getSecurityMechanismSelector();
}
private static synchronized SecurityMechanismSelector _getSecurityMechanismSelector() {
if (sms.get() == null && checkSingleton()) {
sms = new WeakReference(singleton.securityMechanismSelectorProvider.get());
}
return sms.get();
}
/**
* Get the {@link GlassFishORBHelper}.
*
* @return the {@link GlassFishORBHelper}; null if not available
*/
static GlassFishORBHelper getGlassFishORBHelper() {
if (orb.get() != null) {
return orb.get();
}
return _getGlassFishORBHelper();
}
private static synchronized GlassFishORBHelper _getGlassFishORBHelper() {
if (orb.get() == null && checkSingleton()) {
orb = new WeakReference(singleton.glassFishORBHelperProvider.get());
}
return orb.get();
}
/**
* Get the {@link SecurityContextUtil}.
*
* @return the {@link SecurityContextUtil}; null if not available
*/
static SecurityContextUtil getSecurityContextUtil() {
if (sc.get() != null) {
return sc.get();
}
return _getSecurityContextUtil();
}
private static synchronized SecurityContextUtil _getSecurityContextUtil() {
if (sc.get() == null && checkSingleton()) {
sc = new WeakReference(singleton.securityContextUtilProvider.get());
}
return sc.get();
}
/**
* Get the {@link GMSAdapterService}.
*
* @return the {@link GMSAdapterService}; null if not available
*/
static GMSAdapterService getGMSAdapterService() {
return checkSingleton() ? singleton.gmsAdapterServiceProvider.get() : null;
}
}