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.jdwp.host;

import java.io.Closeable;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * Factory for creating controllers.
 *
 * @since 2021/03/08
 */
public final class JDWPHostFactory
    implements Closeable
{
    /** The input communication stream. */
    protected final InputStream in;
    
    /** The output communication stream. */
    protected final OutputStream out;
    
    /**
     * Initializes the factory for the given stream connections.
     * 
     * @param __in The input stream to read from.
     * @param __out The output stream to write to.
     * @throws NullPointerException On null arguments.
     * @since 2021/03/08
     */
    public JDWPHostFactory(InputStream __in, OutputStream __out)
        throws NullPointerException
    {
        if (__in == null || __out == null)
            throw new NullPointerException("NARG");
        
        this.in = new DataInputStream(__in);
        this.out = new DataOutputStream(__out);
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/03/08
     */
    @Override
    public void close()
        throws IOException
    {
        IOException fail = null;
        
        // Close the input
        try
        {
            this.in.close();
        }
        catch (IOException e)
        {
            fail = e;
        }
        
        // And the output
        try
        {
            this.out.close();
        }
        catch (IOException e)
        {
            if (fail == null)
                fail = e;
            else
                fail.addSuppressed(e);
        }
        
        if (fail != null)
            throw fail;
    }
    
    /**
     * Returns the input stream.
     *
     * @return The input stream.
     * @since 2024/01/30
     */
    public InputStream in()
    {
        return this.in;
    }
    
    /**
     * Opens the controller.
     * 
     * @param __bind The binding to use.
     * @return The controller used.
     * @throws NullPointerException On null arguments.
     * @since 2021/03/08
     */
    public final JDWPHostController open(JDWPHostBinding __bind)
        throws NullPointerException
    {
        if (__bind == null)
            throw new NullPointerException("NARG");
        
        // Return a new controller for processing events
        return new JDWPHostController(__bind, this.in, this.out);
    }
    
    /**
     * Returns the output stream.
     *
     * @return The output stream.
     * @since 2024/01/30
     */
    public OutputStream out()
    {
        return this.out;
    }
}