NAME

Config::Model::Itself - Model editor for Config::Model

SYNOPSIS

 my $meta_model = Config::Model -> new ( ) ;

 # load Config::Model model
 my $meta_inst = $model->instance (root_class_name => 'Itself::Model' ,
                                   instance_name   => 'meta_model' ,
                                  );

 my $meta_root = $meta_inst -> config_root ;

 # Itself constructor returns an object to read or write the data
 # structure containing the model to be edited
 my $rw_obj = Config::Model::Itself -> new(model_object => $meta_root ) ;

 # now lead the model to be edited
 $rw_obj -> read_all( conf_dir => '/path/to/model_files') ;

 # For Curses UI prepare a call-back to write model
 my $wr_back = sub { $rw_obj->write_all(conf_dir => '/path/to/model_files');

 # create Curses user interface
 my $dialog = Config::Model::CursesUI-> new
      (
       experience => 'advanced',
       store => $wr_back,
      ) ;

 # start Curses dialog to edit the mode
 $dialog->start( $meta_model )  ;

 # that's it. When user quits curses interface, Curses will call
 # $wr_back sub ref to write the modified model.

DESCRIPTION

The Config::Itself and its model files provide a model of Config:Model (hence the Itself name).

Let's step back a little to explain. Any configuration data is, in essence, structured data. This data could be stored in an XML file. A configuration model is a way to describe the structure and relation of all items of a configuration data set.

This configuration model is also expressed as structured data. This structure data is structured and follow a set of rules which are described for humans in the Config::Model manpage.

The structure and rules documented in the Config::Model manpage are also expressed in a model in the files provided with Config::Model::Itself.

Hence the possibity to verify, modify configuration data provided by Config::Model can also be applied on configuration models. Using the same user interface.

From a Perl point of view, Config::Model::Itself provides a class dedicated to read and write a set of model files.

Constructor

new ( model_object => ... )

Creates a new read/write handler. This handler is dedicated to the model_object passed with the constructor. This parameter must be a the Config::Model::Node manpage class.

Methods

read_all ( model_dir => ... , root_model => ... , [ force_load => 1 ] )

Load all the model files contained in model_dir and all its subdirectories. root_model is used to filter the classes read.

Use force_load if you are trying to load a model containing errors.

read_all returns a hash ref containing ( class_name => file_name , ...)

write_all ( model_dir => ... )

Will write back configuration model in the specified directory. The structure of the read directory is respected.

list_class_element

Returns a string listing all the class and elements. Useful for debugging your configuration model.

AUTHOR

Dominique Dumont, (ddumont at cpan dot org)

COPYRIGHT

LICENSE

This library is free software; you can redistribute it and/or modify it under the LGPL terms.