package Plucene::Analysis::TokenFilter;
=head1 NAME
Plucene::Analysis::TokenFilter - base class for token filters
=head1 DESCRIPTION
This is an abstract base class for token filters.
A TokenFilter is a TokenStream whose input is another token stream.
=head1 METHODS
=cut
use strict;
use warnings;
use base qw/Class::Accessor::Fast/;
__PACKAGE__->mk_accessors(qw[ input ]);
=head2 next
This must be defined in a subclass
=cut
sub next { die "next must be defined in a subclass" }
=head2 close
Does nothing.
=cut
sub close { }
1;