SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.runtime.rms;

import cc.squirreljme.runtime.midlet.ApplicationHandler;

/**
 * This is used to help identify suites and such.
 *
 * @since 2019/04/14
 */
public final class SuiteIdentifier
{
    /** The identifier for the current suite. */
    private static long _CURRENT_ID;
    
    /**
     * Not used.
     *
     * @since 2019/04/14
     */
    private SuiteIdentifier()
    {
    }
    
    /**
     * Returns the current identifier.
     *
     * @return The current identifier.
     * @since 2019/04/14
     */
    public static long currentIdentifier()
    {
        // Already been cached?
        long rv = SuiteIdentifier._CURRENT_ID;
        if (rv != 0)
            return rv;
        
        // Set, cache, and store
        SuiteIdentifier._CURRENT_ID = (rv = SuiteIdentifier.identifier(
            ApplicationHandler.currentVendor(), ApplicationHandler.currentName()));
        return rv;
    }
    
    /**
     * Returns the suite identifier.
     *
     * @param __vend The vendor.
     * @param __suite The suite.
     * @return The identifier.
     * @throws NullPointerException On null arguments.
     * @since 2019/04/14
     */
    public static long identifier(String __vend, String __suite)
        throws NullPointerException
    {
        if (__vend == null || __suite == null)
            throw new NullPointerException("NARG");
        
        return ((((long)__vend.hashCode()) & 0xFFFFFFFFL) << 32) |
            (((long)__suite.hashCode()) & 0xFFFFFFFFL);
    }
}