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
018 package org.apache.commons.net.ftp.parser;
019 import java.util.Calendar;
020
021 import 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 * @version $Id: EnterpriseUnixFTPEntryParser.java 1299238 2012-03-10 17:12:28Z sebb $
033 * @author <a href="Winston.Ojeda@qg.com">Winston Ojeda</a>
034 * @see org.apache.commons.net.ftp.FTPFileEntryParser FTPFileEntryParser (for usage instructions)
035 * @see org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory
036 */
037 public class EnterpriseUnixFTPEntryParser extends RegexFTPFileEntryParserImpl
038 {
039
040 /**
041 * months abbreviations looked for by this parser. Also used
042 * to determine <b>which</b> month has been matched by the parser.
043 */
044 private static final String MONTHS =
045 "(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)";
046
047 /**
048 * this is the regular expression used by this parser.
049 */
050 private static final String REGEX =
051 "(([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])"
052 + "([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z]))"
053 + "(\\S*)\\s*"
054 + "(\\S+)\\s*"
055 + "(\\S*)\\s*"
056 + "(\\d*)\\s*"
057 + "(\\d*)\\s*"
058 + MONTHS
059 + "\\s*"
060 + "((?:[012]\\d*)|(?:3[01]))\\s*"
061 + "((\\d\\d\\d\\d)|((?:[01]\\d)|(?:2[0123])):([012345]\\d))\\s"
062 + "(\\S*)(\\s*.*)";
063
064 /**
065 * The sole constructor for a EnterpriseUnixFTPEntryParser object.
066 *
067 */
068 public EnterpriseUnixFTPEntryParser()
069 {
070 super(REGEX);
071 }
072
073 /**
074 * Parses a line of a unix FTP server file listing and converts it into a
075 * usable format in the form of an <code> FTPFile </code> instance. If
076 * the file listing line doesn't describe a file, <code> null </code> is
077 * returned, otherwise a <code> FTPFile </code> instance representing the
078 * files in the directory is returned.
079 *
080 * @param entry A line of text from the file listing
081 * @return An FTPFile instance corresponding to the supplied entry
082 */
083 public FTPFile parseFTPEntry(String entry)
084 {
085
086 FTPFile file = new FTPFile();
087 file.setRawListing(entry);
088
089 if (matches(entry))
090 {
091 String usr = group(14);
092 String grp = group(15);
093 String filesize = group(16);
094 String mo = group(17);
095 String da = group(18);
096 String yr = group(20);
097 String hr = group(21);
098 String min = group(22);
099 String name = group(23);
100
101 file.setType(FTPFile.FILE_TYPE);
102 file.setUser(usr);
103 file.setGroup(grp);
104 try
105 {
106 file.setSize(Long.parseLong(filesize));
107 }
108 catch (NumberFormatException e)
109 {
110 // intentionally do nothing
111 }
112
113 Calendar cal = Calendar.getInstance();
114 cal.set(Calendar.MILLISECOND, 0);
115 cal.set(Calendar.SECOND,
116 0);
117 cal.set(Calendar.MINUTE,
118 0);
119 cal.set(Calendar.HOUR_OF_DAY,
120 0);
121 try
122 {
123
124 int pos = MONTHS.indexOf(mo);
125 int month = pos / 4;
126 if (yr != null)
127 {
128 // it's a year
129 cal.set(Calendar.YEAR,
130 Integer.parseInt(yr));
131 }
132 else
133 {
134 // it must be hour/minute or we wouldn't have matched
135 int year = cal.get(Calendar.YEAR);
136
137 // if the month we're reading is greater than now, it must
138 // be last year
139 if (cal.get(Calendar.MONTH) < month)
140 {
141 year--;
142 }
143 cal.set(Calendar.YEAR,
144 year);
145 cal.set(Calendar.HOUR_OF_DAY,
146 Integer.parseInt(hr));
147 cal.set(Calendar.MINUTE,
148 Integer.parseInt(min));
149 }
150 cal.set(Calendar.MONTH,
151 month);
152 cal.set(Calendar.DATE,
153 Integer.parseInt(da));
154 file.setTimestamp(cal);
155 }
156 catch (NumberFormatException e)
157 {
158 // do nothing, date will be uninitialized
159 }
160 file.setName(name);
161
162 return file;
163 }
164 return null;
165 }
166 }