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.jvm.suite;

import cc.squirreljme.runtime.cldc.debug.Debugging;

/**
 * This represents the level of the dependency.
 *
 * @since 2017/02/22
 */
public enum SuiteDependencyLevel
{
    /** Required. */
    REQUIRED,
    
    /** Optional. */
    OPTIONAL,
    
    /** End. */
    ;
    
    /**
     * Is this an optional dependency level?
     *
     * @return {@code true} if this is an optional dependency level.
     * @since 2017/11/22
     */
    public boolean isOptional()
    {
        return this == SuiteDependencyLevel.OPTIONAL;
    }
    
    /**
     * Is this an required dependency level?
     *
     * @return {@code true} if this is an required dependency level.
     * @since 2017/11/22
     */
    public boolean isRequired()
    {
        return this == SuiteDependencyLevel.REQUIRED;
    }
    
    /**
     * {@inheritDoc}
     * @since 2017/02/22
     */
    @Override
    public String toString()
    {
        // Convert string
        switch (this)
        {
            case REQUIRED:    return "required";
            case OPTIONAL:    return "optional";
            default:
                throw Debugging.oops();
        }
    }
    
    /**
     * Returns the dependency level based on the input string.
     *
     * @param __s The input string to parse.
     * @return The dependency level for the given string.
     * @throws IllegalArgumentException If the level is not valid.
     * @throws NullPointerException On null arguments.
     * @since 2017/02/22
     */
    public static SuiteDependencyLevel of(String __s)
        throws IllegalArgumentException, NullPointerException
    {
        // Check
        if (__s == null)
            throw new NullPointerException("NARG");
        
        // Depends
        switch (__s.trim())
        {
            case "required":    return SuiteDependencyLevel.REQUIRED;
            case "optional":    return SuiteDependencyLevel.OPTIONAL;
            
                /* {@squirreljme.error DG82 Invalid dependency level. (Level)} */
            default:
                throw new IllegalArgumentException(String.format(
                    "DG82 %s", __s));
        }
    }
}