#!/usr/bin/perl -w

package FlatDB::Iterator;

require Iterator_Utils;
use strict;
use warnings;

my $FIELDSEP = qr/\s+/;

#sub Iterator (&) { return $_[0] }

sub query {
    my $self = shift;
    my ($field, $value) = @_;
    my $fieldnum = $self->{FIELDNUM}{uc $field};
    return unless(defined($fieldnum));
    my $it = $self->{FH};
    return Iterator { 
        local $_;
        while(defined($_=Iterator_Utils::nextval($it))) {
            my @fields = split($self->{FIELDSEP});
            my $fieldval = $fields[$fieldnum];
            return $_ if($fieldval eq $value);
        }
        return;
    };
}