001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.apache.commons.net.ftp.parser; 019import java.util.Calendar; 020 021import org.apache.commons.net.ftp.FTPFile; 022 023/** 024 * Parser for the Connect Enterprise Unix FTP Server From Sterling Commerce. 025 * Here is a sample of the sort of output line this parser processes: 026 * "-C--E-----FTP B QUA1I1 18128 41 Aug 12 13:56 QUADTEST" 027 * <P><B> 028 * Note: EnterpriseUnixFTPEntryParser can only be instantiated through the 029 * DefaultFTPParserFactory by classname. It will not be chosen 030 * by the autodetection scheme. 031 * </B> 032 * @see org.apache.commons.net.ftp.FTPFileEntryParser FTPFileEntryParser (for usage instructions) 033 * @see org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory 034 */ 035public class EnterpriseUnixFTPEntryParser extends RegexFTPFileEntryParserImpl 036{ 037 038 /** 039 * months abbreviations looked for by this parser. Also used 040 * to determine <b>which</b> month has been matched by the parser. 041 */ 042 private static final String MONTHS = 043 "(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)"; 044 045 /** 046 * this is the regular expression used by this parser. 047 */ 048 private static final String REGEX = 049 "(([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])" 050 + "([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z]))" 051 + "(\\S*)\\s*" // 12 052 + "(\\S+)\\s*" // 13 053 + "(\\S*)\\s*" // 14 user 054 + "(\\d*)\\s*" // 15 group 055 + "(\\d*)\\s*" // 16 filesize 056 + MONTHS // 17 month 057 + "\\s*" // TODO should the space be optional? 058 // TODO \\d* should be \\d? surely ? Otherwise 01111 is allowed 059 + "((?:[012]\\d*)|(?:3[01]))\\s*" // 18 date [012]\d* or 3[01] 060 + "((\\d\\d\\d\\d)|((?:[01]\\d)|(?:2[0123])):([012345]\\d))\\s" 061 // 20 \d\d\d\d = year OR 062 // 21 [01]\d or 2[0123] hour + ':' 063 // 22 [012345]\d = minute 064 + "(\\S*)(\\s*.*)"; // 23 name 065 066 /** 067 * The sole constructor for a EnterpriseUnixFTPEntryParser object. 068 * 069 */ 070 public EnterpriseUnixFTPEntryParser() 071 { 072 super(REGEX); 073 } 074 075 /** 076 * Parses a line of a unix FTP server file listing and converts it into a 077 * usable format in the form of an <code> FTPFile </code> instance. If 078 * the file listing line doesn't describe a file, <code> null </code> is 079 * returned, otherwise a <code> FTPFile </code> instance representing the 080 * files in the directory is returned. 081 * 082 * @param entry A line of text from the file listing 083 * @return An FTPFile instance corresponding to the supplied entry 084 */ 085 @Override 086 public FTPFile parseFTPEntry(String entry) 087 { 088 089 FTPFile file = new FTPFile(); 090 file.setRawListing(entry); 091 092 if (matches(entry)) 093 { 094 String usr = group(14); 095 String grp = group(15); 096 String filesize = group(16); 097 String mo = group(17); 098 String da = group(18); 099 String yr = group(20); 100 String hr = group(21); 101 String min = group(22); 102 String name = group(23); 103 104 file.setType(FTPFile.FILE_TYPE); 105 file.setUser(usr); 106 file.setGroup(grp); 107 try 108 { 109 file.setSize(Long.parseLong(filesize)); 110 } 111 catch (NumberFormatException e) 112 { 113 // intentionally do nothing 114 } 115 116 Calendar cal = Calendar.getInstance(); 117 cal.set(Calendar.MILLISECOND, 0); 118 cal.set(Calendar.SECOND, 0); 119 cal.set(Calendar.MINUTE, 0); 120 cal.set(Calendar.HOUR_OF_DAY, 0); 121 122 int pos = MONTHS.indexOf(mo); 123 int month = pos / 4; 124 final int missingUnit; // the first missing unit 125 try 126 { 127 128 if (yr != null) 129 { 130 // it's a year; there are no hours and minutes 131 cal.set(Calendar.YEAR, Integer.parseInt(yr)); 132 missingUnit = Calendar.HOUR_OF_DAY; 133 } 134 else 135 { 136 // it must be hour/minute or we wouldn't have matched 137 missingUnit = Calendar.SECOND; 138 int year = cal.get(Calendar.YEAR); 139 140 // if the month we're reading is greater than now, it must 141 // be last year 142 if (cal.get(Calendar.MONTH) < month) 143 { 144 year--; 145 } 146 cal.set(Calendar.YEAR, year); 147 cal.set(Calendar.HOUR_OF_DAY, Integer.parseInt(hr)); 148 cal.set(Calendar.MINUTE, Integer.parseInt(min)); 149 } 150 cal.set(Calendar.MONTH, month); 151 cal.set(Calendar.DAY_OF_MONTH, Integer.parseInt(da)); 152 cal.clear(missingUnit); 153 file.setTimestamp(cal); 154 } 155 catch (NumberFormatException e) 156 { 157 // do nothing, date will be uninitialized 158 } 159 file.setName(name); 160 161 return file; 162 } 163 return null; 164 } 165}