#!/usr/bin/perl
package SQL::QueryBuilder::Pretty::Database::ANSI::Clause;
use base qw(SQL::QueryBuilder::Pretty::Rule);

use strict;
use warnings;

our $VERSION = '0.01';

use Carp qw(croak);
use Data::Dumper;

sub order { return 60 }

sub match { 
    return qr/
        FROM|WHERE|HAVING
        | 
        (?:GROUP|ORDER)\s+BY
        |
        (?:
            (?:
                (?:LEFT|RIGHT)(?:\s+OUTER)?
                |CROSS|INNER
            )
            \s+
        )?JOIN
    /x;
}

sub action {
    my $self  = shift;
    my $print = shift;
    my $token = shift;

    $print->new_line;
    $print->unindent;
    $print->var($token);
    $print->new_line;
    $print->indent;

    $print->indent_multiplier(2);
    $print->skip_next_space(1);

    return 1;
}

1;
__END__
=head1 NAME

SQL::QueryBuilder::Pretty::Database::ANSI::Clause - Rule to process ANSI 
clauses.

=head1 VERSION

Version 0.01

=head1 INHERITANCE

Is a L<SQL::QueryBuilder::Pretty::Rule>.

=head1 DESCRIPTION

Rule to process ANSI clauses.

=head2 METHODS

=over 4

=item I<PACKAGE>->new()

Initializes the object.

=item I<$obj>->action($print_object, $token)

THe action to be executed on match. Must return 1 to skip the next rules.

$print_object is a L<SQL::QueryBuilder::Pretty::Print> object.

$token is the result of the match.

=item I<$obj>->match

Returns the match regular expression for this rule.

=item I<$obj>->name

Returns the name of the rule. By default the pm file. Not used yet.

=item I<$obj>->order

Returns the order value for this rule. Default is 999.

=item I<$obj>->type

Returns the type of this rule. Not used yet.

=back

=head1 SEE ALSO

L<SQL::QueryBuilder::Pretty>, L<SQL::QueryBuilder::Pretty::Print>
and L<SQL::QueryBuilder::Pretty::Rule>.

=head1 AUTHOR

André Rivotti Casimiro, C<< <rivotti at cpan.org> >>

=head1 COPYRIGHT AND LICENSE

Copyright (C) 2009 by André Rivotti Casimiro. Published under the terms of 
the Artistic License 2.0.

=cut