/*
 * Copyright 2005 The Apache Software Foundation
 *
 * Licensed 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 org.apache.commons.net.ftp.parser;

import java.text.ParseException;
import java.util.Calendar;

/**
 * This interface specifies the concept of parsing an FTP server's 
 * timestamp.
 * @since 1.4
 */
public interface FTPTimestampParser {
    
	/**
	 * the default default date format. 
	 */
	public static final String DEFAULT_SDF = UnixFTPEntryParser.DEFAULT_DATE_FORMAT;
	/**
	 * the default recent date format. 
	 */
	public static final String DEFAULT_RECENT_SDF = UnixFTPEntryParser.DEFAULT_RECENT_DATE_FORMAT;
	
	/**
	 * Parses the supplied datestamp parameter.  This parameter typically would 
	 * have been pulled from a longer FTP listing via the regular expression 
	 * mechanism
	 * @param timestampStr - the timestamp portion of the FTP directory listing
	 * to be parsed
	 * @return a <code>java.util.Calendar</code> object initialized to the date
	 * parsed by the parser
	 * @throws ParseException if none of the parser mechanisms belonging to 
	 * the implementor can parse the input.
	 */
	public Calendar parseTimestamp(String timestampStr) throws ParseException;
	
}
