Abstract-Meta-Class

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lib/Abstract/Meta/Attribute/Method.pm  view on Meta::CPAN

}


=item pending_transation

=cut

{   my %pending_association;


=item start_association_process

Start association process (to avoid infinitive look of associating the others ends)
Takes obj reference.

=cut

    sub start_association_process {
    my ($self) = @_;
        $pending_association{$self} = 1;
    }


=item has_pending_association

Returns true is object is during association process.

=cut

    sub has_pending_association {
        my ($self) = @_;
        $pending_association{$self}; 
    }


=item end_association_process

Compleetes association process.

=cut

    sub end_association_process {
        my ($self) = @_;
        delete $pending_association{$self};
    }

}


=item associate_the_other_end

Associate current object reference to the the other end associated class.

lib/Abstract/Meta/Attribute/Method.pm  view on Meta::CPAN

    my $associated_class = $attr->associated_class;
    my $the_other_end_attribute = $associated_class->meta->attribute($the_other_end);

    confess "missing other end attribute on ". ref($value) . "::" . $the_other_end
        unless $the_other_end_attribute;

    confess "invalid definition for " . ref($self) ."::". $name
    . " - associatied class not defined on " . ref($value) ."::" . $the_other_end
        unless $the_other_end_attribute->associated_class;

    start_association_process($value);
    eval {
            my $association_call = 'associate_' . lc($the_other_end_attribute->perl_type) . '_as_the_other_end';
            $attr->$association_call($self, $value);
    };
    end_association_process($value);
    die $@ if $@;
}



=item associate_scalar_as_the_other_end

=cut

sub associate_scalar_as_the_other_end {

lib/Abstract/Meta/Attribute/Method.pm  view on Meta::CPAN

=cut

sub deassociate {
    my ($attr, $self) = @_;
    my $transistent = $attr->transistent;    
    my $storage_key = $attr->storage_key;
    my $array_storage_type = $attr->storage_type eq 'Array';
    my $value = ($transistent ? get_attribute($self, $storage_key) : ($array_storage_type ? $self->[$storage_key] : $self->{$storage_key})) or return;
    my $the_other_end = $attr->the_other_end;
    return if ! $the_other_end || has_pending_association($value);
    start_association_process($self);
    my $associated_class = $attr->associated_class;
    my $the_other_end_attribute = $associated_class->meta->attribute($the_other_end);
    my $deassociation_call = 'deassociate_' . lc($the_other_end_attribute->perl_type) . '_as_the_other_end';
    if(ref($value) eq 'ARRAY') {
        $the_other_end_attribute->$deassociation_call($self, $_) for @$value;
    } elsif(ref($value) eq 'HASH') {
        $the_other_end_attribute->$deassociation_call($self, $value->{$_}) for(keys %$value);
    } else {
        $the_other_end_attribute->$deassociation_call($self, $value);
    }
    end_association_process($self);
}


=item deassociate_scalar_as_the_other_end

=cut

sub deassociate_scalar_as_the_other_end {
    my ($attr, $self, $the_other_end_obj) = @_;
    $the_other_end_obj or return;

lib/Abstract/Meta/Class.pm  view on Meta::CPAN

    package Triggers;

    use Abstract::Meta::Class ':all';

    has '@.y' => (
        on_change => sub {
            my ($self, $attribute_name, $scope, $value_ref, $index) = @_;
            # scope -> mutator, item_accessor
            ... do some stuff

            # process further in standard way by returning true
            $self;
        },
        # replaces standard read
        on_read => sub {
            my ($self, $attr_name, $scope, $index)
            #scope can be: item_accessor, accessor
            ...
            #return requested value
        },
        item_accessor => 'y_item'