Oryx::MetaClass - abstract base class for all Oryx meta types
All Oryx components implement the interface defined herein. This is the basis for all Oryx components to share a common interface. All this really means is that when an object is created, retrieved, deleted etc. then each meta-instance (Oryx::Attribute, Oryx::Association etc.) associated with the class or instance can decide what it wants to do during each call. So when we say:
CMS::Page->create({ ... });
then in the create() method inherited from Oryx::Class we do something similar to:
sub create {
my ($class, $params) = @_;
# do a few things with $params, exactly what would depend
# on whether we're using DBI or DBM back-end
$_->create($query, $params, ...) foreach $class->members;
# return a newly created instance
}
Here the members method (defined in Oryx::Class returns all meta-instances hanging off the class, and to each on is the create method delegated; hence the common interface.
meta object's create() hook
meta object's retrieve() hook
meta object's update() hook
meta object's delete() hook
meta object's search() hook
meta object's construct() hook
Each meta-type (with the exception of Oryx::Value types) has meta-data associated with it which is usually defined in the $schema class variable used in your persistent classes.
The following are accessors for this meta-data:
usually returns a hash reference which corresponds to the meta-data described in $schema.
get a value from the meta-data hash ref keyed by $name
set a value from the meta-data hash ref keyed by $name
Copyright (C) 2005 Richard Hundt <richard NO SPAM AT protea-systems.com>
This library is free software and may be used under the same terms as Perl itself.
