org.apache.commons.net.nntp

Class NewGroupsOrNewsQuery

public final class NewGroupsOrNewsQuery extends Object

The NewGroupsOrNewsQuery class. This is used to issue NNTP NEWGROUPS and NEWNEWS queries, implemented by {@link org.apache.commons.net.nntp.NNTPClient#listNewNewsgroups listNewNewsGroups } and {@link org.apache.commons.net.nntp.NNTPClient#listNewNews 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.

Author: Daniel F. Savarese

Constructor Summary
	NewGroupsOrNewsQuery(Calendar date, boolean gmt) Creates a new query using the given time as a reference point.

Method Summary
void	addDistribution(String distribution) Add a distribution group to the query.
void	addNewsgroup(String newsgroup) Add a newsgroup to the list of newsgroups being queried.
String	getDate() Return the NNTP query formatted date (year, month, day in the form YYMMDD.
String	getDistributions() Return the comma separated list of distributions.
String	getNewsgroups() Return the comma separated list of newsgroups.
String	getTime() Return the NNTP query formatted time (hour, minutes, seconds in the form HHMMSS.
boolean	isGMT() Return whether or not the query date should be treated as GMT.
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.

Constructor Detail

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 Detail

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..