NAME
Config::Model::Instance - Instance of configuration tree
SYNOPSIS
my $model = Config::Model->new() ;
$model ->create_config_class ( ... ) ;
my $inst = $model->instance (root_class_name => 'SomeRootClass',
instance_name => 'some_name');DESCRIPTION
This module provides an object that holds a configuration tree.
CONSTRUCTOR
Usually, an instance object is created by calling instance method on an existing model:
my $inst = $model->instance (root_class_name => 'SomeRootClass',
instance_name => 'test1');Usually, directory (or directories) holding configuration files is specified within the configuration model. For test purpose you can specify this directory with any of these parameters :
- read_directory
-
Where to read the configuration files
- write_directory
-
Where to write back the configuration files
- directory
-
Where to read and write configuration files
Note that all directory specified within the configuration model will be overridden.
METHODS
name()
Returns the instance name.
config_root()
Returns the root object of the configuration tree.
config_model()
Returns the model of the configuration tree.
push_no_value_check ( fetch | store | type , ... )
Tune Config::Model::Value to perform check on read (fetch) or write (store) or verify the value according to its value_type. The passed parameters are stacked. Parameters are :
- store
-
Skip write check.
- fetch
-
Skip read check.
- type
-
Skip value_type check (See Config::Model::Value for details). I.e Config::Model::Value will not enforce type checking.
Note that these values are stacked. They can be read by get_value_check until the next push_no_value_check or pop_no_value_check call.
Example:
$i->push_no_value_check('fetch') ;
$i->push_no_value_check('fetch','type') ;pop_no_value_check()
Pop off the check stack the last check set entered with push_no_value_check.
get_value_check ( fetch | store | type | fetch_or_store )
Read the check status. Returns 1 if a check is to be done. O if not. When used with the fetch_or_store parameter, returns a logical or or the check values, i.e. read_check || write_check
data( kind, [data] )
The data method provide a way to store some arbitrary data in the instance object.
load( "..." )
Load configuration tree with configuration data. See Config::Model::Loader for more details
search_element ( element => <name> [, privilege => ... ] )
Search an element in the configuration model (respecting privilege level).
This method returns a Config::Model::Searcher object. See Config::Model::Searcher for details on how to handle a search.
wizard_helper ( ... )
This method returns a Config::Model::WizardHelper object. See Config::Model::WizardHelper for details on how to create a wizard widget with this object.
wizard_helper arguments are explained in Config::Model::WizardHelper constructor arguments.
Auto read and write feature
Usually, a program based on config model must first create the configuration model, then load all configuration data.
This feature enables you to declare with the model a way to load configuration data (and to write it back). See Config::Model::AutoRead for details.
read_directory()
Returns directory where configuration data is read from.
write_directory()
Returns directory where configuration data is written to.
register_write_back ( sub_ref )
Register a sub ref that will be called with write_back method.
write_back
Run all subroutines registered with register_write_back to write the configuration informations. (See Config::Model::AutoRead for details).
AUTHOR
Dominique Dumont, domi@komarr.grenoble.hp.com
SEE ALSO
Config::Model, Config::Model::Node, Config::Model::Loader, Config::Model::Searcher, Config::Model::Value,