com.feilong.lib.net.ftp.parser.EnterpriseUnixFTPEntryParser Maven / Gradle / Ivy
Show all versions of feilong Show documentation
/*
* 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 com.feilong.lib.net.ftp.parser;
import java.util.Calendar;
import com.feilong.lib.net.ftp.FTPFile;
/**
* Parser for the Connect Enterprise Unix FTP Server From Sterling Commerce.
* Here is a sample of the sort of output line this parser processes:
* "-C--E-----FTP B QUA1I1 18128 41 Aug 12 13:56 QUADTEST"
*
*
* Note: EnterpriseUnixFTPEntryParser can only be instantiated through the
* DefaultFTPParserFactory by classname. It will not be chosen
* by the autodetection scheme.
*
*
* @version $Id$
* @see com.feilong.lib.net.ftp.FTPFileEntryParser FTPFileEntryParser (for usage instructions)
* @see com.feilong.lib.net.ftp.parser.DefaultFTPFileEntryParserFactory
*/
public class EnterpriseUnixFTPEntryParser extends RegexFTPFileEntryParserImpl{
/**
* months abbreviations looked for by this parser. Also used
* to determine which month has been matched by the parser.
*/
private static final String MONTHS = "(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)";
/**
* this is the regular expression used by this parser.
*/
private static final String REGEX = "(([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])"
+ "([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z])([\\-]|[A-Z]))" + "(\\S*)\\s*" // 12
+ "(\\S+)\\s*" // 13
+ "(\\S*)\\s*" // 14 user
+ "(\\d*)\\s*" // 15 group
+ "(\\d*)\\s*" // 16 filesize
+ MONTHS // 17 month
+ "\\s*" // TODO should the space be optional?
// TODO \\d* should be \\d? surely ? Otherwise 01111 is allowed
+ "((?:[012]\\d*)|(?:3[01]))\\s*" // 18 date [012]\d* or 3[01]
+ "((\\d\\d\\d\\d)|((?:[01]\\d)|(?:2[0123])):([012345]\\d))\\s"
// 20 \d\d\d\d = year OR
// 21 [01]\d or 2[0123] hour + ':'
// 22 [012345]\d = minute
+ "(\\S*)(\\s*.*)"; // 23 name
/**
* The sole constructor for a EnterpriseUnixFTPEntryParser object.
*
*/
public EnterpriseUnixFTPEntryParser(){
super(REGEX);
}
/**
* Parses a line of a unix FTP server file listing and converts it into a
* usable format in the form of an FTPFile instance. If
* the file listing line doesn't describe a file, null is
* returned, otherwise a FTPFile instance representing the
* files in the directory is returned.
*
* @param entry
* A line of text from the file listing
* @return An FTPFile instance corresponding to the supplied entry
*/
@Override
public FTPFile parseFTPEntry(String entry){
FTPFile file = new FTPFile();
file.setRawListing(entry);
if (matches(entry)){
String usr = group(14);
String grp = group(15);
String filesize = group(16);
String mo = group(17);
String da = group(18);
String yr = group(20);
String hr = group(21);
String min = group(22);
String name = group(23);
file.setType(FTPFile.FILE_TYPE);
file.setUser(usr);
file.setGroup(grp);
try{
file.setSize(Long.parseLong(filesize));
}catch (NumberFormatException e){
// intentionally do nothing
}
Calendar cal = Calendar.getInstance();
cal.set(Calendar.MILLISECOND, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.HOUR_OF_DAY, 0);
int pos = MONTHS.indexOf(mo);
int month = pos / 4;
final int missingUnit; // the first missing unit
try{
if (yr != null){
// it's a year; there are no hours and minutes
cal.set(Calendar.YEAR, Integer.parseInt(yr));
missingUnit = Calendar.HOUR_OF_DAY;
}else{
// it must be hour/minute or we wouldn't have matched
missingUnit = Calendar.SECOND;
int year = cal.get(Calendar.YEAR);
// if the month we're reading is greater than now, it must
// be last year
if (cal.get(Calendar.MONTH) < month){
year--;
}
cal.set(Calendar.YEAR, year);
cal.set(Calendar.HOUR_OF_DAY, Integer.parseInt(hr));
cal.set(Calendar.MINUTE, Integer.parseInt(min));
}
cal.set(Calendar.MONTH, month);
cal.set(Calendar.DAY_OF_MONTH, Integer.parseInt(da));
cal.clear(missingUnit);
file.setTimestamp(cal);
}catch (NumberFormatException e){
// do nothing, date will be uninitialized
}
file.setName(name);
return file;
}
return null;
}
}