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.launch;

import cc.squirreljme.jvm.mle.brackets.JarPackageBracket;
import cc.squirreljme.jvm.suite.DependencyInfo;
import cc.squirreljme.jvm.suite.ProvidedInfo;
import cc.squirreljme.jvm.suite.SuiteInfo;

/**
 * This represents a library that can be used as a dependency, this includes
 * APIs and normal libraries.
 *
 * @since 2020/12/28
 */
public final class Library
{
    /** The library information. */
    protected final SuiteInfo info;
    
    /** The JAR which contains the library. */
    protected final JarPackageBracket jar;
    
    /** Dependencies. */
    private DependencyInfo _dependencies;
    
    /** Provided dependencies. */
    private ProvidedInfo _provided;
    
    /**
     * Initializes the library.
     * 
     * @param __info The JAR information.
     * @param __jar The JAR itself.
     * @throws NullPointerException On null arguments.
     * @since 2020/12/29
     */
    Library(SuiteInfo __info, JarPackageBracket __jar)
        throws NullPointerException
    {
        if (__info == null || __jar == null)
            throw new NullPointerException("NARG");
        
        this.info = __info;
        this.jar = __jar;
    }
    
    /**
     * Returns the dependencies.
     * 
     * @return Dependencies.
     * @since 2021/01/03
     */
    protected DependencyInfo dependencies()
    {
        DependencyInfo rv = this._dependencies;
        if (rv == null)
            this._dependencies = (rv = this.info.dependencies());
        return rv;
    }
    
    /**
     * Returns the provided dependencies.
     * 
     * @return Provided dependencies.
     * @since 2021/01/03
     */
    protected ProvidedInfo provided()
    {
        ProvidedInfo rv = this._provided;
        if (rv == null)
            this._provided = (rv = this.info.provided());
        return rv;
    }
    
    /**
     * {@inheritDoc}
     * @since 2022/02/03
     */
    @Override
    public String toString()
    {
        return this.info.suite().toString();
    }
}