SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the GNU General Public License v3+, or later.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.runtime.nttdocomo.io;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.InputConnection;

/**
 * Connects to resources which are on the class path.
 *
 * I am assuming that i-mode does not support or does not recommend that
 * {@link Class#getResourceAsStream(String)} be used.
 *
 * @since 2021/11/30
 */
public class ResourceConnection
    implements InputConnection
{
    /** The pivot class for resource lookup. */
    private final Class<?> pivot;
    
    /** The name of the resource to open. */
    private final String rcName;
    
    /**
     * Initializes the resource connection.
     *
     * @param __pivot The pivot class.
     * @param __rcName The resource name.
     * @throws NullPointerException On null arguments.
     * @since 2021/12/01
     */
    public ResourceConnection(Class<?> __pivot, String __rcName)
        throws NullPointerException
    {
        if (__pivot == null || __rcName == null)
            throw new NullPointerException("NARG");
        
        this.pivot = __pivot;
        this.rcName = __rcName;
    }
    
    /**
     * {@inheritDoc}
     *
     * @since 2021/11/30
     */
    @Override
    public void close()
        throws IOException
    {
        // Does nothing
    }
    
    /**
     * {@inheritDoc}
     *
     * @since 2021/11/30
     */
    @Override
    public DataInputStream openDataInputStream()
        throws IOException
    {
        return new DataInputStream(this.openInputStream());
    }
    
    /**
     * {@inheritDoc}
     *
     * @since 2021/11/30
     */
    @Override
    public InputStream openInputStream()
        throws IOException
    {
        return this.pivot.getResourceAsStream(this.rcName);
    }
}