NAME

MouseX::AttributeHelpers - Extend your attribute interfaces

SYNOPSIS

    package MyClass;

    use Mouse;
    use MouseX::AttributeHelpers;

    has 'mapping' => (
        metaclass => 'Collection::Hash',
        is        => 'rw',
        isa       => 'HashRef',
        default   => sub { +{} },
        provides  => {
            exists => 'exists_in_mapping',
            keys   => 'ids_in_mapping',
            get    => 'get_mapping',
            set    => 'set_mapping',
        },
    );

    package main;

    my $obj = MyClass->new;
    $obj->set_quantity(10);      # quantity => 10
    $obj->set_mapping(4, 'foo'); # 4 => 'foo'
    $obj->set_mapping(5, 'bar'); # 5 => 'bar'
    $obj->set_mapping(6, 'baz'); # 6 => 'baz'

    # prints 'bar'
    print $obj->get_mapping(5) if $obj->exists_in_mapping(5);

    # prints '4, 5, 6'
    print join ', ', $obj->ids_in_mapping;

DESCRIPTION

MouseX::AttributeHelpers provides commonly used attribute helper methods for more specific types of data.

As seen in the "SYNOPSIS", you specify the extension via the metaclass parameter.

PARAMETERS

provides

This points to a hashref that uses provider for the keys and method for the values. The method will be added to the object itself and do what you want.

curries

This points to a hashref that uses provider for the keys and has two choices for the value:

You can supply { method => \@args } for the values. The method will be added to the object itself (always using @args as the beginning arguments).

Another approach to curry a method provider is to supply a coderef instead of an arrayref. The code ref takes $self, $body, and any additional arguments passed to the final method.