/*
* 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 org.apache.commons.net.ftp.parser;
import java.text.ParseException;
import org.apache.commons.net.ftp.Configurable;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPFile;
/**
* Implementation of FTPFileEntryParser and FTPFileListParser for NT Systems.
*
* @author <a href="Winston.Ojeda@qg.com">Winston Ojeda</a>
* @author <a href="mailto:scohen@apache.org">Steve Cohen</a>
* @version $Id: NTFTPEntryParser.java 1299238 2012-03-10 17:12:28Z sebb $
* @see org.apache.commons.net.ftp.FTPFileEntryParser FTPFileEntryParser (for usage instructions)
*/
public class NTFTPEntryParser extends ConfigurableFTPFileEntryParserImpl
{
private static final String DEFAULT_DATE_FORMAT
= "MM-dd-yy hh:mma"; //11-09-01 12:30PM
private static final String DEFAULT_DATE_FORMAT2
= "MM-dd-yy kk:mm"; //11-09-01 18:30
private FTPTimestampParser timestampParser;
/**
* this is the regular expression used by this parser.
*/
private static final String REGEX =
"(\\S+)\\s+(\\S+)\\s+" // MM-dd-yy whitespace hh:mma|kk:mm; swallow trailing spaces
+ "(?:(<DIR>)|([0-9]+))\\s+" // <DIR> or ddddd; swallow trailing spaces
+ "(\\S.*)"; // First non-space followed by rest of line (name)
/**
* The sole constructor for an NTFTPEntryParser object.
*
* @exception IllegalArgumentException
* Thrown if the regular expression is unparseable. Should not be seen
* under normal conditions. It it is seen, this is a sign that
* <code>REGEX</code> is not a valid regular expression.
*/
public NTFTPEntryParser()
{
this(null);
}
/**
* This constructor allows the creation of an NTFTPEntryParser object
* with something other than the default configuration.
*
* @param config The {@link FTPClientConfig configuration} object used to
* configure this parser.
* @exception IllegalArgumentException
* Thrown if the regular expression is unparseable. Should not be seen
* under normal conditions. It it is seen, this is a sign that
* <code>REGEX</code> is not a valid regular expression.
* @since 1.4
*/
public NTFTPEntryParser(FTPClientConfig config)
{
super(REGEX);
configure(config);
FTPClientConfig config2 = new FTPClientConfig(
FTPClientConfig.SYST_NT,
DEFAULT_DATE_FORMAT2,
null, null, null, null);
config2.setDefaultDateFormatStr(DEFAULT_DATE_FORMAT2);
this.timestampParser = new FTPTimestampParserImpl();
((Configurable)this.timestampParser).configure(config2);
}
/**
* Parses a line of an NT FTP server file listing and converts it into a
* usable format in the form of an <code> FTPFile </code> instance. If the
* file listing line doesn't describe a file, <code> null </code> is
* returned, otherwise a <code> FTPFile </code> instance representing the
* files in the directory is returned.
* <p>
* @param entry A line of text from the file listing
* @return An FTPFile instance corresponding to the supplied entry
*/
public FTPFile parseFTPEntry(String entry)
{
FTPFile f = new FTPFile();
f.setRawListing(entry);
if (matches(entry))
{
String datestr = group(1)+" "+group(2);
String dirString = group(3);
String size = group(4);
String name = group(5);
try
{
f.setTimestamp(super.parseTimestamp(datestr));
}
catch (ParseException e)
{
// parsing fails, try the other date format
try
{
f.setTimestamp(timestampParser.parseTimestamp(datestr));
}
catch (ParseException e2)
{
// intentionally do nothing
}
}
if (null == name || name.equals(".") || name.equals(".."))
{
return (null);
}
f.setName(name);
if ("<DIR>".equals(dirString))
{
f.setType(FTPFile.DIRECTORY_TYPE);
f.setSize(0);
}
else
{
f.setType(FTPFile.FILE_TYPE);
if (null != size)
{
f.setSize(Long.parseLong(size));
}
}
return (f);
}
return null;
}
/**
* Defines a default configuration to be used when this class is
* instantiated without a {@link FTPClientConfig FTPClientConfig}
* parameter being specified.
* @return the default configuration for this parser.
*/
@Override
public FTPClientConfig getDefaultConfiguration() {
return new FTPClientConfig(
FTPClientConfig.SYST_NT,
DEFAULT_DATE_FORMAT,
null, null, null, null);
}
}