001/*
002 * This file is part of the JDrupes non-blocking HTTP Codec
003 * Copyright (C) 2016, 2017  Michael N. Lipp
004 *
005 * This program is free software; you can redistribute it and/or modify it 
006 * under the terms of the GNU Lesser General Public License as published
007 * by the Free Software Foundation; either version 3 of the License, or 
008 * (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful, but 
011 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
012 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
013 * License for more details.
014 *
015 * You should have received a copy of the GNU Lesser General Public License along 
016 * with this program; if not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jdrupes.httpcodec;
020
021import java.nio.Buffer;
022
023/**
024 * Represents a message header (either request or response) which preceeds
025 * the option payload data. Header and payload together form the complete
026 * message.
027 */
028public interface MessageHeader {
029
030        /**
031         * Returns {@code true} if the complete message comprises 
032         * additional data in {@link Buffer}s when decoded or encoded.
033         * 
034         * @return {@code true} if payload data follows
035         */
036        boolean hasPayload();
037        
038        /**
039         * Returns true if this is the final message received or transmitted
040         * on a connection.
041         * 
042         * @return the result
043         */
044        boolean isFinal();
045
046}