NAME

       Lire::Timegroup - Base class for implementation of the timegroup aggregator

SYNOPSIS

           use Lire::Timegroup;

DESCRIPTION

       This module is the base class for implementation of the timegroup aggregator. This
       aggregator will split the DLF records based on a time period controlled throught the
       period attribute. For example, using 1d as the period value, this aggregator will group
       all records in the same day period together.

CONSTRUCTOR

   new( %params )
       Creates a new instance of a timegroup aggregator. In addition to the normal report
       operator parameters, the timegroup aggregator can take several parameters:

       field
           This optional parameter contains the DLF field which contains the time value used to
           group the DLF records together. See the field() method for more information.

       period
           This mandatory parameter should contains the period's length that will be used to
           group the records. See the period() method for more information.

METHODS

   field( [$new_field] )
       Returns the DLF field's name that is used to group the DLF records.  This should be a
       valid timestamp DLF field in the current schema. By default, the default timestamp field
       of the DLF schema is used.

       You can change the field by passing a $new_field parameter.

   period( [$new_period])
       Returns the period's length in which the records are grouped. This can either be a
       duration value or the name of a report specification's parameter containing a duration
       value.

       The period's length can be changed by using the $new_period parameter.

SEE ALSO

        Lire::ReportSpec(3pm), Lire::Group(3pm), Lire::ReportOperator(3pm),
        Lire::Timeslot(3pm)

AUTHORS

         Francis J. Lacoste <flacoste@logreport.org>
         Wolfgang Sourdeau <Wolfgang.Sourdeau@Contre.COM>

VERSION

       $Id: Timegroup.pm,v 1.33 2006/07/23 13:16:30 vanbaal Exp $

COPYRIGHT

       Copyright (C) 2001-2004 Stichting LogReport Foundation LogReport@LogReport.org

       This file is part of Lire.

       Lire is free software; you can redistribute it and/or modify it under the terms of the GNU
       General Public License as published by the Free Software Foundation; either version 2 of
       the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program
       (see COPYING); if not, check with http://www.gnu.org/copyleft/gpl.html.