1Config::Model::Dumper(3U)ser Contributed Perl DocumentatiCoonnfig::Model::Dumper(3)
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NAME

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

9       version 2.150
10

SYNOPSIS

12        use Config::Model ;
13
14        # define configuration tree object
15        my $model = Config::Model->new ;
16        $model ->create_config_class (
17           name => "MyClass",
18           element => [
19               [qw/foo bar/] => {
20                   type => 'leaf',
21                   value_type => 'string'
22               },
23               baz => {
24                   type => 'hash',
25                   index_type => 'string' ,
26                   cargo => {
27                       type => 'leaf',
28                       value_type => 'string',
29                   },
30               },
31
32           ],
33        ) ;
34
35        my $inst = $model->instance(root_class_name => 'MyClass' );
36
37        my $root = $inst->config_root ;
38
39        # put some data in config tree the hard way
40        $root->fetch_element('foo')->store('yada') ;
41        $root->fetch_element('bar')->store('bla bla') ;
42        $root->fetch_element('baz')->fetch_with_id('en')->store('hello') ;
43
44        # put more data the easy way
45        my $steps = 'baz:fr=bonjour baz:hr="dobar dan"';
46        $root->load( steps => $steps ) ;
47
48        # dump only customized data
49        print $root->dump_tree;
50

DESCRIPTION

52       This module is used directly by Config::Model::Node to serialize
53       configuration data in a compact (but readable) string.
54
55       The serialization can be done in standard mode where only customized
56       values are dumped in the string. I.e. only data modified by the user
57       are dumped.
58
59       All other mode supported by "fetch" in Config::Model::Value can be
60       used, for instance, to get default values.
61
62       The serialized string can be used by Config::Model::Loader to store the
63       data back into a configuration tree.
64
65       Note that undefined values are skipped for list element. I.e. if a list
66       element contains "('a',undef,'b')", the dump then contains 'a','b'.
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CONSTRUCTOR

69   new
70       No parameter. The constructor should be used only by
71       Config::Model::Node.
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Methods

74   dump_tree
75       Return a string that contains a dump of the object tree with all the
76       values. This string follows the convention defined by
77       Config::Model::Loader.
78
79       The serialized string can be used by Config::Model::Loader to store the
80       data back into a configuration tree.
81
82       Parameters are:
83
84       mode
85           "full" dumps all configuration data including default values.
86
87           All mode values from "fetch" in Config::Model::Value can be used.
88
89           By default, the dump contains only data modified by the user (i.e.
90           "custom" data that differ from default or preset values).
91
92       node
93           Reference to the Config::Model::Node object that is dumped. All
94           nodes and leaves attached to this node are also dumped.
95
96       skip_auto_write ( <backend_name> )
97           Skip node that have a write capability matching "backend_name" in
98           their model. See Config::Model::BackendMgr.
99
100           This option must be used when using Dumper to write back
101           configuration data. When a configuration model contains several
102           backends (one at the tree root and others in tree nodes), setting
103           this option ensure that the "root" configuration file does not
104           contain data duplicated in configuration file of others tree nodes.
105
106       auto_vivify
107           Scan and create data for nodes elements even if no actual data was
108           stored in them. This may be useful to trap missing mandatory
109           values.  (default: 0)
110
111       check
112           Check value before dumping. Valid check are 'yes', 'no' and 'skip'.
113

AUTHOR

115       Dominique Dumont, (ddumont at cpan dot org)
116

SEE ALSO

118       Config::Model,Config::Model::Node,Config::Model::Loader
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AUTHOR

121       Dominique Dumont
122

124       This software is Copyright (c) 2005-2022 by Dominique Dumont.
125
126       This is free software, licensed under:
127
128         The GNU Lesser General Public License, Version 2.1, February 1999
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132perl v5.34.1                      2022-05-09          Config::Model::Dumper(3)
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