Config::Model::DumpAsData (3)

Leading comments

Automatically generated by Pod::Man 4.09 (Pod::Simple 3.35)

Standard preamble:
========================================================================

(The comments found at the beginning of the groff file "man3/Config::Model::DumpAsData.3pm".)

NAME

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

VERSION

version 2.106

SYNOPSIS

 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'
 #       };

DESCRIPTION

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.

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'.

CONSTRUCTOR

new ( )

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

Methods

dump_as_data(...)

Return a perl data structure

Parameters are:

node

Reference to a Config::Model::Node object. Mandatory

full_dump

Also dump default values in the data structure. Useful if the dumped configuration data is used by the application. (default is yes)

Note that "mode" parameter is also accepted and overrides "full_dump" parameter. See ``fetch(...)'' in Config::Model::Value for details on "mode".

skip_auto_write

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.

auto_vivify

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.

ordered_hash_as_list

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'
  }

Methods

dump_annotations_as_pod(...)

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

Parameters are:

node

Reference to a Config::Model::Node object. Mandatory

check_list

Yes, no or skip

AUTHOR

Dominique Dumont, (ddumont at cpan dot org)

SEE ALSO

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

AUTHOR

Dominique Dumont

COPYRIGHT AND LICENSE

This software is Copyright (c) 2005-2017 by Dominique Dumont.

This is free software, licensed under:

  The GNU Lesser General Public License, Version 2.1, February 1999