NAME

Config::Model::Dumper - Serialize data of config tree

VERSION

version 2.068

SYNOPSIS

 use Config::Model ;
 use Log::Log4perl qw(:easy) ;
 Log::Log4perl->easy_init($WARN);

 # 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 $step = 'baz:fr=bonjour baz:hr="dobar dan"';
 $root->load( step => $step ) ;

 # dump only customized data
 print $root->dump_tree;

DESCRIPTION

This module is used directly by Config::Model::Node to serialize configuration data in a compact (but readable) string.

The serialization can be done in standard mode where only customized values are dumped in the string. I.e. only data modified by the user are dumped.

The other mode is full_dump mode where all all data, including default values, are dumped.

The serialized string can be used by Config::Model::Loader to store the data back into a configuration tree.

Note that undefined values are skipped for list element. I.e. if a list element contains ('a',undef,'b'), the dump will contain 'a','b'.

CONSTRUCTOR

new ( )

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

Methods

dump_tree

Return a string that contains a dump of the object tree with all the values. This string follows the convention defined by Config::Model::Loader.

The serialized string can be used by Config::Model::Loader to store the data back into a configuration tree.

Parameters are:

mode ( full | preset | custom )

full will dump all configuration data including default values.

preset will dump only value entered in preset mode.

By default, the dump contains only data modified by the user (i.e. custom data that differ from default or preset values).

node

Reference to the Config::Model::Node object that is dumped. All nodes and leaves attached to this node are also dumped.

skip_auto_write ( <backend_name> )

Skip node that have a write capability matching backend_name in their model. See Config::Model::BackendMgr.

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. (default: 0)

check

Check value before dumping. Valid check are 'yes', 'no' and 'skip'.

AUTHOR

Dominique Dumont, (ddumont at cpan dot org)

SEE ALSO

Config::Model,Config::Model::Node,Config::Model::Loader

AUTHOR

Dominique Dumont

COPYRIGHT AND LICENSE

This software is Copyright (c) 2015 by Dominique Dumont.

This is free software, licensed under:

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

cpanm Config::Model

perl -MCPAN -e shell
install Config::Model