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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.internal.api.Globals;
import org.jvnet.hk2.component.Habitat;

/**
 * This class is a local utility class to provide for hk2 lookups during runtime.
 * @author Sudarsan Sridhar
 */
class Lookups {

    private static WeakReference sms = new WeakReference(null);
    private static WeakReference orb = new WeakReference(null);
    private static WeakReference sc = new WeakReference(null);
    
    

    static SecurityMechanismSelector getSecurityMechanismSelector(Habitat habitat) {
        if (sms.get() != null) {
            return sms.get();
        }
        return _getSecurityMechanismSelector(habitat);
    }

    private static synchronized SecurityMechanismSelector _getSecurityMechanismSelector(Habitat habitat) {
        if (sms.get() == null) {
            sms = new WeakReference(habitat.getComponent(SecurityMechanismSelector.class));
        }
        return sms.get();
    }

    static GlassFishORBHelper getGlassFishORBHelper(Habitat habitat) {
        if (orb.get() != null) {
            return orb.get();
        }
        return _getGlassFishORBHelper(habitat);
    }

    private static synchronized GlassFishORBHelper _getGlassFishORBHelper(Habitat habitat) {
        if (orb.get() == null) {
            orb = new WeakReference(habitat.getComponent(GlassFishORBHelper.class));
        }
        return orb.get();
    }

    static SecurityContextUtil getSecurityContextUtil(Habitat habitat) {
        if (sc.get() != null) {
            return sc.get();
        }
        return _getSecurityContextUtil(habitat);
    }

    private static synchronized SecurityContextUtil _getSecurityContextUtil(Habitat habitat) {
        if (sc.get() == null) {
            sc = new WeakReference(habitat.getComponent(SecurityContextUtil.class));
        }
        return sc.get();
    }
}