NAME

Bigtop::ScriptHelp::Style - Factory for scripts' command line and standard in handlers

SYNOPSIS

use Bigtop::ScriptHelp;
use Bigtop::ScriptHelp::Style;

my $style = ...

my $style_helper = Bigtop::ScriptHelp::Style->get_style( $style );

# pass this style as the first parameter to
#   Bigtop::ScriptHelp->get_big_default
#   Bigtop::ScriptHelp->augment_tree

DESCRIPTION

This module factors command line argument and standard in handling out of scripts and ScriptHelp. It is a simple factory. Call get_style with the name of a style module, to receive a style suitable for passing to <Bigtop::ScriptHelp-get_big_default>> and <Bigtop::ScriptHelp-augment_tree>>. All styles live in the Bigtop::ScriptHelp::Style namespace.

Each stye must implement get_db_layout which is the only method called by Bigtop::ScriptHelp methods. See below for what it receives and returns.

METHODS

get_style

Factory method.

Parameter: style name. This must be the name of a module in the Bigtop::ScriptHelp::Style:: namespace.

Returns: and object of the named style which responds to get_db_layout.

new

Trivial constructor used internally to make an object solely to provide dispatching to get_db_layout. All Styles should subclass from this class, but they are welcome to override or augment new.

SUBCLASS METHODS

All subclasses should live in the Bigtop::ScriptHelp::Style:: namespace and implement one method:

get_db_layout

Parameters:

invocant

usually useless

art

all command line args joined by spaces. Note that flags should have already been consumed by some script.

tables

a hash reference keyed by existing table name, the values are always 1

Returns: a single hash reference with these keys:

all_tables

the tables hash from the passed in parameters with an extra key for each new table

new_tables

an array reference of new tables names

joiners

an array reference of new three way join tables

foreigners

a hash reference keyed by table name storing an array reference of the table's new foreign keys

AUTHOR

Phil Crow, <crow.phil@gmail.com>

COPYRIGHT AND LICENSE

Copyright (C) 2007, Phil Crow

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.6 or, at your option, any later version of Perl 5 you may have available.