// Copyright (C) 2010, 2011 GlavSoft LLC.
// All rights reserved.
//
//-------------------------------------------------------------------------
// This file is part of the TightVNC software.  Please visit our Web site:
//
//                       http://www.tightvnc.com/
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//-------------------------------------------------------------------------
//

package com.glavsoft.rfb.encoding.decoder;

/**
 * Resizeable to needed length byte buffer
 * Singleton for share among decoders.
 */
public class ByteBuffer {
	private static ByteBuffer instance = new ByteBuffer();
	private byte [] buffer = new byte[0];

	private ByteBuffer() { /*empty*/ }
	public static ByteBuffer getInstance() {
		return instance;
	}

	/**
	 * Checks for buffer capacity is enougth ( < length) and enlarge it if not
	 *
	 * @param length
	 */
	public void correctBufferCapacity(int length) {
		// procondition: buffer != null
		assert (buffer != null);
		if (buffer.length < length) {
			buffer = new byte[length];
		}
	}

	public byte[] getBuffer(int length) {
		correctBufferCapacity(length);
		return buffer;
	}

}