Package org.apache.commons.net.nntp

Class NewGroupsOrNewsQuery

java.lang.Object
org.apache.commons.net.nntp.NewGroupsOrNewsQuery
public final class NewGroupsOrNewsQuery extends Object
The NewGroupsOrNewsQuery class. This is used to issue NNTP NEWGROUPS and NEWNEWS queries, implemented by listNewNewsGroups and listNewNews respectively. It prevents you from having to format date, time, distribution, and newgroup arguments.

You might use the class as follows: 

 query = new NewsGroupsOrNewsQuery(new GregorianCalendar(97, 11, 15), false);
 query.addDistribution("comp");
 NewsgroupInfo[] newsgroups = client.listNewgroups(query);
This will retrieve the list of newsgroups starting with the comp. distribution prefix created since midnight 11/15/97.
See Also:

  • Constructor Details

    • NewGroupsOrNewsQuery

      public NewGroupsOrNewsQuery(Calendar date, boolean gmt)
      Creates a new query using the given time as a reference point.
      Parameters:
      date - The date since which new groups or news have arrived.
      gmt - True if the date should be considered as GMT, false if not.

  • Method Details

    • addDistribution

      public void addDistribution(String distribution)
      Add a distribution group to the query. The distribution part of a newsgroup is the segment of the name preceding the first dot (e.g., comp, alt, rec). Only those newsgroups matching one of the distributions or, in the case of NEWNEWS, an article in a newsgroup matching one of the distributions, will be reported as a query result. Adding distributions is purely optional.
      Parameters:
      distribution - A distribution to add to the query.

    • addNewsgroup

      public void addNewsgroup(String newsgroup)
      Add a newsgroup to the list of newsgroups being queried. Newsgroups added this way are only meaningful to the NEWNEWS command. Newsgroup names may include the * wildcard, as in comp.lang.* or comp.lang.java.*. Adding at least one newsgroup is mandatory for the NEWNEWS command.
      Parameters:
      newsgroup - The newsgroup to add to the list of groups to be checked for new news.

    • getDate

      public String getDate()
      Return the NNTP query formatted date (year, month, day in the form YYMMDD).
      Returns:
      The NNTP query formatted date.

    • getDistributions

      public String getDistributions()
      Return the comma separated list of distributions. This may be null if there are no distributions.
      Returns:
      The list of distributions, which may be null if no distributions have been specified.

    • getNewsgroups

      public String getNewsgroups()
      Return the comma separated list of newsgroups. This may be null if there are no newsgroups
      Returns:
      The list of newsgroups, which may be null if no newsgroups have been specified.

    • getTime

      public String getTime()
      Return the NNTP query formatted time (hour, minutes, seconds in the form HHMMSS).
      Returns:
      The NNTP query formatted time.

    • isGMT

      public boolean isGMT()
      Return whether or not the query date should be treated as GMT.
      Returns:
      True if the query date is to be treated as GMT, false if not.

    • omitNewsgroup

      public void omitNewsgroup(String newsgroup)
      Add a newsgroup to the list of newsgroups being queried, but indicate that group should not be checked for new news. Newsgroups added this way are only meaningful to the NEWNEWS command. Newsgroup names may include the * wildcard, as in comp.lang.* or comp.lang.java.*.

      The following would create a query that searched for new news in all comp.lang.java newsgroups except for comp.lang.java.advocacy. 

       query.addNewsgroup("comp.lang.java.*");
 query.omitNewsgroup("comp.lang.java.advocacy");
      Parameters:
      newsgroup - The newsgroup to add to the list of groups to be checked for new news, but which should be omitted from the search for new news.