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NAME

Config::Model::Backend::Json - Read and write config as a JSON data structure

VERSION

version 2.155

SYNOPSIS

# 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',
},
},
],
rw_config => {
backend => 'Json' ,
config_dir => '/tmp',
file => 'foo.json',
auto_create => 1,
}
) ;
my $inst = $model->instance(root_class_name => 'MyClass' );
my $root = $inst->config_root ;
my $steps = 'foo=yada bar="bla bla" baz:en=hello
baz:fr=bonjour baz:hr="dobar dan"';
$root->load( steps => $steps ) ;
$inst->write_back ;

Now, /tmp/foo.yml contains:

{
"bar" : "bla bla",
"foo" : "yada",
"baz" : {
"hr" : "dobar dan",
"en" : "hello",
"fr" : "bonjour"
}
}

DESCRIPTION

This module is used directly by Config::Model to read or write the content of a configuration tree written with Json syntax in Config::Model configuration tree.

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

CONSTRUCTOR

new

Parameters: ( node => $node_obj, name => 'Json' )

Inherited from Config::Model::Backend::Any. The constructor is called by Config::Model::BackendMgr.

read

Of all parameters passed to this read call-back, only file_path is used. This parameter must be a Path::Tiny.

When a file is read, read returns 1.

write

Of all parameters passed to this write call-back, only file_path is used. This parameter must be Path::Tiny object.

write returns 1.

AUTHOR

Dominique Dumont, (ddumont at cpan dot org)

SEE ALSO

Config::Model, Config::Model::BackendMgr, Config::Model::Backend::Any,

AUTHOR

Dominique Dumont

COPYRIGHT AND LICENSE

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