<?php
/**
 * File containing the ezcMailParserSet interface
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 * @package Mail
 * @version //autogen//
 * @copyright Copyright (C) 2005-2010 eZ Systems AS. All rights reserved.
 * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
 */

/**
 * Interface common to all parser sets.
 *
 * A parser set provides a simple interface to fetch mail data line by
 * line from a set of mail.
 *
 * @package Mail
 * @version //autogen//
 */
interface ezcMailParserSet
{
    /**
     * Returns one line of data from the current mail in the set
     * including the ending linebreak.
     *
     * Null is returned if there is no current mail in the set or
     * the end of the mail is reached,
     *
     * @return string
     */
    public function getNextLine();

    /**
     * Moves the set to the next mail and returns true upon success.
     *
     * False is returned if there are no more mail in the set.
     *
     * @return bool
     */
    public function nextMail();

    /**
     * Returns true if mail data is available for parsing.
     *
     * @return bool
     */
    public function hasData();
}
?>