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Badger::Data(3) User Contributed Perl Documentation Badger::Data(3)
 

This is being merged in from Template::TT3::Type. The documentation still refers to the old name and relates to TT-specific use.

Badger::Data - base class for data object

    # defining a subclass data type
    package Badger::Data::Thing;
    use base 'Badger::Data';
    
    our $METHODS = {
        wibble => \&wibble,
        wobble => \&wobble,
    };
    
    sub wibble {
        my $self = shift;
        # some wibble code...
    }
    
    sub wobble {
        my $self = shift;
        # some wobble code...
    }

This module is being merged in from the prototype "Template-TT3" code. The implementation is subject to change and the documentation may be incomplete or incorrect in places.

The "Badger::Data" module implements a base class for the Badger::Data::Text, Badger::Data::List and Badger::Data::Hash data objects.

The following methods are defined in addition to those inherited from Badger::Prototype and Badger::Base.

Initialialisation method to handle any per-object initialisation. This is called by the new() method inherited from Badger::Base . In this base class, the method simply copies all items in the $config hash array into the $self object.

Create a copy of the current object.
    my $clone = $object->clone();
Additional named parameters can be provided. These are merged with the items defined in the parent object and passed to the cloned object's init() method.
    my $clone = $object->clone( g => 0.577 );

Returns a reference to a hash array containing the content of the $METHODS package variable in the current class and any base classes.
    my $methods = $object->methods;

Returns a reference to a particular method from the hash reference returned by the methods() method.
    my $method = $object->method('ref');
When called without any arguments, it returns a reference to the entire hash reference, as per methods().
    my $method = $object->method->{ foo };

This method provides access to an out-of-band (i.e. stored separately from the data itself) hash array of metadata for the data item. It returns a reference to a hash array when called without arguments.
    # fetch metadata hash and add an entry
    my $metadata = $data->metadata;
    $metadata->{ author } = 'Arthur Dent';
    
    # later... print the metadata
    print $data->metadata->{ author };
It returns the value of an item in the metadata hash when called with a single argument.
    print $data->metadata('author');
It sets the value of an item when called with two arguments.
    $data->metadata( author => 'Ford Prefect' );

Returns the name of the object type, e.g. "Template::TT3::Type", "Template::TT3::Type::Text", Template::TT3::Type::List, etc., exactly as Perl's "ref()" function does.

Returns a true/false (1/0) value to indicate if the target data is defined.

Returns a true/false (1/0) value to indicate if the target data is undefined.

Returns a true/false (1/0) value to indicate if the target data has a true value (using by Perl's definition of what constitutes truth).

Returns a true/false (1/0) value to indicate if the target data has a false value (using by Perl's definition of what constitutes truth).

Andy Wardley <http://wardley.org/>

Copyright (C) 1996-2008 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

Template::TT3::Type::Text, Template::TT3::Type::List and Template::TT3::Type::Hash.
2016-12-12 perl v5.28.1

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