Class::MakeMethods::Template::InsideOut - External data
package MyObject;
use Class::MakeMethods::Template::InsideOut (
scalar => [ 'foo', 'bar' ]
);
sub new { ... }
package main;
my $obj = MyObject->new( foo => "Foozle", bar => "Bozzle" );
print $obj->foo(); # Prints Foozle
$obj->bar("Bamboozle"); # Sets $obj's bar value
Supports the Generic object constructor and accessors meta-method types, but
accepts any object as the underlying implementation type, with member data
stored in external indices.
Each method stores the values associated with various objects in an hash keyed
by the object's stringified identity. Since that hash is accessible only from
the generated closures, it is impossible for foreign code to manipulate those
values except through the method interface.
A DESTROY method is installed to remove data for expired objects from the
various hashes. (If the DESTROY method is not called, your program will not
release this data and memory will be wasted.)
Common Parameters: The following parameters are defined for InsideOut
meta-methods.
- data
- An auto-vivified reference to a hash to be used to store
the values for each object.
Note that using InsideOut meta-methods causes the installation of a DESTROY
method in the calling class, which deallocates data for each instance when it
is discarded.
NOTE: This needs some more work to properly handle inheritance.
The following methods from Generic are all supported:
scalar
string
string_index *
number
boolean
bits
array
hash
tiedhash
hash_of_arrays
object
instance
array_of_objects
code
code_or_scalar
See Class::MakeMethods::Template::Generic for the interfaces and behaviors of
these method types.
The items marked with a * above are specifically defined in this package,
whereas the others are formed automatically by the interaction of this
package's generic settings with the code templates provided by the Generic
superclass.
boolean_index => [ qw / foo bar baz / ]
Like InsideOut:boolean, boolean_index creates x, set_x, and clear_x methods.
However, it also defines a class method find_x which returns a list of the
objects which presently have the x-flag set to true.
Note that to free items from memory, you must clear these bits!