NAME

       Lire::First - Lire class that implements the first operator

SYNOPSIS

       use Lire::First

DESCRIPTION

       Class that implements the first operator. This operator will output the first value
       appearing in its field when the DLF records are sorted according to the "sort_fields"
       attribute. The default sort order is the default timestamp sort.

METHODS

   new( %params )
       Creates a new Lire::First object. The field attribute can be specified in the "field"
       parameter and the sort order can be passed in the "sort_fields" parameter.

   sort_fields( [$new_sort_fields] )
       Returns the fields that are going to be used to sort the DLF records.  This a reference to
       an array of DLF field names.

       If the $new_sort_fields parameter is set, it will be used as the new sort order. It must
       be an array reference and should only contains valid field names for the current report
       specification's schema.

       When no sort_fields are set, the default is to use the default timestamp field.

SEE ALSO

        Lire::ReportSpec(3pm), Lire::ReportOperator(3pm),
        Lire::Aggregator(3pm), Lire::Aggregate(3pm), Lire::Last(3pm)

AUTHORS

         Francis J. Lacoste <flacoste@logreport.org>
         Wolfang Sourdeau <wsourdeau@logreport.org>

VERSION

       $Id: First.pm,v 1.15 2008/03/09 19:27:31 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.