DOKK / manpages / debian 12 / libconfig-model-perl / Config::Model::DumpAsData.3pm.en
Config::Model::DumpAsData(3pm) User Contributed Perl Documentation Config::Model::DumpAsData(3pm)

Config::Model::DumpAsData - Dump configuration content as a perl data structure

version 2.152

 use Config::Model ;
 use Data::Dumper ;
 # define configuration tree object
 my $model = Config::Model->new ;
 $model ->create_config_class (
    name => "MyClass",
    element => [
        [qw/foo bar/] => {
            type => 'leaf',
            value_type => 'string'
        },
        baz => {
            type => 'hash',
            index_type => 'string' ,
            cargo => {
                type => 'leaf',
                value_type => 'string',
            },
        },
    ],
 ) ;
 my $inst = $model->instance(root_class_name => 'MyClass' );
 my $root = $inst->config_root ;
 # put some data in config tree the hard way
 $root->fetch_element('foo')->store('yada') ;
 $root->fetch_element('bar')->store('bla bla') ;
 $root->fetch_element('baz')->fetch_with_id('en')->store('hello') ;
 # put more data the easy way
 my $steps = 'baz:fr=bonjour baz:hr="dobar dan"';
 $root->load( steps => $steps ) ;
 print Dumper($root->dump_as_data);
 # $VAR1 = {
 #         'bar' => 'bla bla',
 #         'baz' => {
 #                    'en' => 'hello',
 #                    'fr' => 'bonjour',
 #                    'hr' => 'dobar dan'
 #                  },
 #         'foo' => 'yada'
 #       };

This module is used directly by Config::Model::Node to dump the content of a configuration tree in perl data structure.

The perl data structure is a hash of hash. Only CheckList content is stored in an array ref.

User can pass a sub reference to apply to values of boolean type. This sub can be used to convert the value to an object representing a boolean like boolean. (since 2.129)

Note that undefined values are skipped for list element. I.e. if a list element contains "('a',undef,'b')", the data structure then contains 'a','b'.

No parameter. The constructor should be used only by Config::Model::Node.

Return a perl data structure

Parameters are:

Reference to a Config::Model::Node object. Mandatory
Also dump default values in the data structure. Useful if the dumped configuration data is used by the application. This parameter is deprecated in favor of mode parameter.
Note that "mode" parameter is also accepted and overrides "full_dump" parameter. See "fetch" in Config::Model::Value for details on "mode".
Skip node that have a "perl write" capability in their model. See Config::Model::BackendMgr.

This option must be used when using DumpAsData: to write back configuration data. When a configuration model contains several backends (one at the tree root and others in tree nodes), setting this option ensure that the "root" configuration file does not contain data duplicated in configuration file of others tree nodes.

Scan and create data for nodes elements even if no actual data was stored in them. This may be useful to trap missing mandatory values.
By default, ordered hash (i.e. the order of the keys are important) are dumped as Perl list. This is the faster way to dump such hashed while keeping the key order. But it's the less readable way.

When this parameter is 1 (default), the ordered hash is dumped as a list:

  my_hash => [ A => 'foo', B => 'bar', C => 'baz' ]

When this parameter is set as 0, the ordered hash is dumped with a special key that specifies the order of keys. E.g.:

  my_hash => {
   __my_hash_order => [ 'A', 'B', 'C' ] ,
   B => 'bar', A => 'foo', C => 'baz'
  }
Sub reference to map a value of type boolean to a boolean class (since 2.129). For instance: 

 to_boolean => sub { boolean($_[0]); }

Default is "sub { return $_[0] }"

Return a string formatted in pod (See perlpod) with the annotations.

Parameters are:

Reference to a Config::Model::Node object. Mandatory
Yes, no or skip

Dominique Dumont, (ddumont at cpan dot org)

Config::Model,Config::Model::Node,Config::Model::ObjTreeScanner

Dominique Dumont

This software is Copyright (c) 2005-2022 by Dominique Dumont.

This is free software, licensed under:

  The GNU Lesser General Public License, Version 2.1, February 1999
2022-07-28 perl v5.34.0