org.apache.commons.net.ftp.parser

## Class VMSVersioningFTPEntryParser

- java.lang.Object
- - org.apache.commons.net.ftp.FTPFileEntryParserImpl
  - - org.apache.commons.net.ftp.parser.RegexFTPFileEntryParserImpl
    - - org.apache.commons.net.ftp.parser.ConfigurableFTPFileEntryParserImpl
      - - org.apache.commons.net.ftp.parser.VMSFTPEntryParser
        - - org.apache.commons.net.ftp.parser.VMSVersioningFTPEntryParser

- All Implemented Interfaces:
    Configurable, FTPFileEntryParser

      public class VMSVersioningFTPEntryParser
      extends VMSFTPEntryParser

  Special implementation VMSFTPEntryParser with versioning turned on. This parser removes all duplicates and only leaves the version with the highest version number for each file name.

  This is a sample of VMS LIST output

        "1-JUN.LIS;1              9/9           2-JUN-1998 07:32:04  [GROUP,OWNER]    (RWED,RWED,RWED,RE)",
        "1-JUN.LIS;2              9/9           2-JUN-1998 07:32:04  [GROUP,OWNER]    (RWED,RWED,RWED,RE)",
        "DATA.DIR;1               1/9           2-JUN-1998 07:32:04  [GROUP,OWNER]    (RWED,RWED,RWED,RE)",

  See Also:
    `FTPFileEntryParser (for usage instructions)`

- - ### Field Summary

    - ### Fields inherited from class org.apache.commons.net.ftp.parser.RegexFTPFileEntryParserImpl

      `_matcher_`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `VMSVersioningFTPEntryParser()` Constructor for a VMSFTPEntryParser object.
    `VMSVersioningFTPEntryParser(FTPClientConfig config)` This constructor allows the creation of a VMSVersioningFTPEntryParser object with something other than the default configuration.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected boolean` | `isVersioning()` Returns `false`.
    `List<String>` | `preParse(List<String> original)` Implement hook provided for those implementers (such as VMSVersioningFTPEntryParser, and possibly others) which return multiple files with the same name to remove the duplicates.

    - ### Methods inherited from class org.apache.commons.net.ftp.parser.VMSFTPEntryParser

      `getDefaultConfiguration, parseFTPEntry, readNextEntry`

    - ### Methods inherited from class org.apache.commons.net.ftp.parser.ConfigurableFTPFileEntryParserImpl

      `configure, parseTimestamp`

    - ### Methods inherited from class org.apache.commons.net.ftp.parser.RegexFTPFileEntryParserImpl

      `getGroupCnt, getGroupsAsString, group, matches, setRegex, setRegex`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### VMSVersioningFTPEntryParser

          public VMSVersioningFTPEntryParser()

      Constructor for a VMSFTPEntryParser object.
      Throws:
        `IllegalArgumentException` - Thrown if the regular expression is unparseable. Should not be seen under normal conditions. If the exception is seen, this is a sign that `REGEX` is not a valid regular expression.

    - #### VMSVersioningFTPEntryParser

          public VMSVersioningFTPEntryParser(FTPClientConfig config)

      This constructor allows the creation of a VMSVersioningFTPEntryParser object with something other than the default configuration.
      Parameters:
        `config` - The `configuration` object used to configure this parser.
      Throws:
        `IllegalArgumentException` - Thrown if the regular expression is unparseable. Should not be seen under normal conditions. If the exception is seen, this is a sign that `REGEX` is not a valid regular expression.

  - ### Method Detail

    - #### isVersioning

          protected boolean isVersioning()

      Description copied from class: `VMSFTPEntryParser`
      Returns `false`.
      Overrides:
        `isVersioning` in class `VMSFTPEntryParser`
      Returns:
        `false`.

    - #### preParse

          public List<String> preParse(List<String> original)

      Implement hook provided for those implementers (such as VMSVersioningFTPEntryParser, and possibly others) which return multiple files with the same name to remove the duplicates.
      Specified by:
        `preParse` in interface `FTPFileEntryParser`
      Overrides:
        `preParse` in class `FTPFileEntryParserImpl`
      Parameters:
        `original` - Original list
      Returns:
        Original list purged of duplicates