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The DSI utilities are a mishmash of classes accumulated during the last twenty years in projects developed at the DSI (Dipartimento di Scienze dell'Informazione, i.e., Information Sciences Department), now DI (Dipartimento di Informatica, i.e., Informatics Department), of the Universita` degli Studi di Milano.

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/*
 * DSI utilities
 *
 * Copyright (C) 2005-2020 Sebastiano Vigna
 *
 *  This library is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU Lesser General Public License as published by the Free
 *  Software Foundation; either version 3 of the License, or (at your option)
 *  any later version.
 *
 *  This library 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 Lesser General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, see .
 *
 */

package it.unimi.dsi.compression;

/** An abstract factory corresponding to an instance of a specific compression technique.
 *
 * An implementation of this interface provides coders and decoders. The
 * constructors must provide all data that is required to perform coding
 * and decoding.
 */

public interface Codec {
	/** Returns a coder for the compression technique represented by this coded.
	 *
	 * @return a coder for the compression technique represented by this codec. */
	public Coder coder();

	/** Returns a decoder for the compression technique represented by this coded.
	 *
	 * @return a decoder for the compression technique represented by this codec. */
	public Decoder decoder();

	/** Returns the number of symbols handled by this codec.
	 *
	 * @return the number of symbols handled by this codec.
	 */
	public int size();
}