Abstract-Meta-Class

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

            my $result = $on_read
            ? $on_read ->($self, $attr, 'accessor')
            : get_attribute($self, $storage_key);
            $result;
        }
        : (
           $on_read ?
           sub {
            my ($self, @args) = @_;
            $self->$mutator(@args) if scalar(@args) >= 1;
            my $result = $on_read
            ? $on_read ->($self, $attr, 'accessor')
            : $self->[$storage_key];
            $result;
            } :
            sub {
                my ($self, @args) = @_;
                $self->$mutator(@args) if @args >= 1;
                $self->[$storage_key];
            }
           )
        )
    :
    sub {
        my ($self, @args) = @_;
        $self->$mutator(@args) if scalar(@args) >= 1;
        my $result = $on_read
        ? $on_read ->($self, $attr, 'accessor')
        : $transistent ? get_attribute($self, $storage_key) : $self->{$storage_key};
        $result;
    };
}


=item generate_code_accessor_method

=cut

sub generate_code_accessor_method {
    my $attr = shift;
    $attr->generate_scalar_accessor_method;
}


=item generate_mutator_method

=cut

sub generate_mutator_method {
    my $attr = shift;
    my $storage_key = $attr->storage_key;
    my $transistent = $attr->transistent;    
    my $accessor = $attr->accessor;
    my $required = $attr->required;
    my $default = $attr->default;
    my $associated_class = $attr->associated_class;
    my $perl_type = $attr->perl_type;
    my $index_by = $attr->index_by;
    my $on_change = $attr->on_change;
    my $data_type_validation = $attr->data_type_validation;
    my $on_validate = $attr->on_validate;
    my $array_storage_type = $attr->storage_type eq 'Array';
    $array_storage_type ?
    sub {
        my ($self, $value) = @_;
        if (! defined $value && defined $default) {
            if (ref($default) eq 'CODE') {
                $value = $default->($self, $attr);
            } else {
                $value = $default;
            }
        }

        $on_validate->($self, $attr, 'mutator', \$value) if $on_validate;
        if ($data_type_validation) {
            $value = index_association_data($value, $accessor, $index_by)
                if ($associated_class && $perl_type eq 'Hash');
            $attr->validate_data_type($self, $value, $accessor, $associated_class, $perl_type);
            if($required) {
                if ($perl_type eq 'Hash') {
                    confess "attribute $accessor is required"
                      unless scalar %$value;
                      
                } elsif ($perl_type eq 'Array') {
                    confess "attribute $accessor is required"
                      unless scalar @$value;
                }
            }

        } else {
        confess "attribute $accessor is required"
          if $required && ! defined $value;
        }
        
        $on_change->($self, $attr, 'mutator', \$value) or return $self
          if ($on_change && defined $value);
        

        if ($transistent) {
            set_attribute($self, $storage_key, $value);
        } else {
            $self->[$storage_key] = $value;
        }
        $self;
    }    
    :
    sub {
        my ($self, $value) = @_;
        if (! defined $value && defined $default) {
            if (ref($default) eq 'CODE') {
                $value = $default->($self, $attr);
            } else {
                $value = $default;
            }
        }

        $on_validate->($self, $attr, 'mutator', \$value) if $on_validate;
        if ($data_type_validation) {
            $value = index_association_data($value, $accessor, $index_by)
                if ($associated_class && $perl_type eq 'Hash');
            $attr->validate_data_type($self, $value, $accessor, $associated_class, $perl_type);
            if($required) {
                if ($perl_type eq 'Hash') {
                    confess "attribute $accessor is required"
                      unless scalar %$value;
                      
                } elsif ($perl_type eq 'Array') {
                    confess "attribute $accessor is required"
                      unless scalar @$value;
                }
            }
        } else {
            confess "attribute $accessor is required"
              if $required && ! defined $value;
        }

        
        $on_change->($self, $attr, 'mutator', \$value) or return $self
          if ($on_change && defined $value);
        

        if ($transistent) {
            set_attribute($self, $storage_key, $value);
        } else {
            $self->{$storage_key} = $value;
        }
        $self;
    };
}


=item index_association_data

=cut

sub index_association_data {
    my ($data, $attr_name, $index) = @_;
    return $data if ref($data) eq 'HASH';
    my %result;
    if($index && $$data[0]->can($index)) {
        %result = (map {($_->$index, $_)} @$data);
    } else {
        %result = (map {($_  . "", $_)} @$data);
    }
    \%result;
}


=item validate_data_type

=cut

sub validate_data_type {
    my ($attr, $self, $value, $accessor, $associated_class, $perl_type) = @_;
    my $array_storage_type = $attr->storage_type eq 'Array';
    if ($perl_type eq 'Array') {
        confess "$accessor must be $perl_type type"
            unless (ref($value) eq 'ARRAY');
        if ($associated_class) {
            validate_associated_class($attr, $self, $_)
              for @$value;
        }
    } elsif ($perl_type eq 'Hash') {
        confess "$accessor must be $perl_type type"
          unless (ref($value) eq 'HASH');
        if ($associated_class) {
            validate_associated_class($attr, $self, $_)
              for values %$value;
        }
    } elsif ($associated_class) {
        my $transistent = $attr->transistent;    
        my $storage_key = $attr->storage_key;
        my $current_value = $transistent ? get_attribute($self, $storage_key) : ($array_storage_type ? $self->[$storage_key] : $self->{$storage_key});
        return if ($value && $current_value && $value eq $current_value);
        $attr->deassociate($self);
        if (defined $value) {
            validate_associated_class($attr, $self, $value);
        }
    }
}


=item validate_associated_class

=cut

sub validate_associated_class {
    my ($attr, $self, $value) = @_;
    my $associated_class = $attr->associated_class;
    my $name = $attr->name;
    my $value_type = ref($value)
      or confess "$name must be of the $associated_class type";    
    return &associate_the_other_end if $value_type eq $associated_class;
    return &associate_the_other_end if $value->isa($associated_class);
    confess "$name must be of the $associated_class type, is $value_type";      
}


=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

    sub {
        my ($self, @args) = @_;
        $self->$mutator(@args) if scalar(@args) >= 1;
        my $result = $on_read
            ? $on_read->($self, $attr, 'accessor') 
            : ($transistent ? get_attribute($self, $storage_key) : ($self->{$storage_key} ||= {}));
        wantarray ? %$result : $result;            
    };
} 


=item generate_hash_mutator_method

=cut

sub generate_hash_mutator_method {
    shift()->generate_mutator_method;
}


=item generate_hash_item_accessor_method

=cut

sub generate_hash_item_accessor_method {
    my $attr = shift;
    my $accesor =  $attr->accessor;
    my $on_change = $attr->on_change;
    my $on_read = $attr->on_read;
    sub {
        my $self = shift;
        my ($key, $value) = (@_);
        my $hash_ref = $self->$accesor();
        if(defined $value) {
            $on_change->($self, $attr, 'item_accessor', \$value, $key) or return $hash_ref->{$key}
              if ($on_change);
            $hash_ref->{$key} = $value;
        }
        $on_read ? $on_read->($self, $attr, 'item_accessor', $key) : $hash_ref->{$key};
    };
}


=item generate_hash_add_method

=cut

sub generate_hash_add_method {
    my $attr = shift;
    my $accessor = $attr->accessor;
    my $item_accessor = $attr->item_accessor;
    my $on_change = $attr->on_change;
    my $on_read = $attr->on_read;
    my $index_by = $attr->index_by;
    sub {
        my ($self, @values) = @_;
        my $hash_ref = $self->$accessor();
        foreach my $value (@values) {
            next unless ref($value);
            my $key = ($index_by ? $value->$index_by : $value . "") or confess "unknown key hash at add_$accessor";
            $attr->validate_associated_class($self, $value);
            $on_change->($self, $attr, 'item_accessor', \$value, $key) or return $hash_ref->{$key}
              if ($on_change);
            $hash_ref->{$key} = $value;
        }
        $self;
    };
}


=item generate_scalar_reset_method

=cut

sub generate_scalar_reset_method {
    my $attr = shift;
    my $mutator = $attr->mutator;
    my $index_by = $attr->index_by;
    sub {
        my ($self, ) = @_;
        $self->$mutator(undef);
    };
}


=item generate_scalar_has_method

=cut

sub generate_scalar_has_method {
    my $attr = shift;
    sub {
        my ($self, ) = @_;
        !! $attr->get_value($self);
    };
}


=item generate_hash_reset_method

=cut

sub generate_hash_reset_method {
    my $attr = shift;
    my $mutator = $attr->mutator;
    my $index_by = $attr->index_by;
    sub {
        my ($self, ) = @_;
        $self->$mutator({});
    };
}



=item generate_hash_has_method

=cut

sub generate_hash_has_method {
    my $attr = shift;
    sub {

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

=item generate_array_shift_method

=cut

sub generate_array_shift_method {
    my $attr = shift;
    my $accesor = $attr->accessor;
    sub {
        my $self = shift;
        my $array_ref= $self->$accesor();
        shift @$array_ref;
    };
}


=item generate_array_unshift_method

=cut

sub generate_array_unshift_method {
    my $attr = shift;
    my $accesor = $attr->accessor;
    sub {
        my $self = shift;
        my $array_ref = $self->$accesor();
        unshift @$array_ref, @_;
    };
}


=item generate_array_count_method

=cut

sub generate_array_count_method {
    my $attr = shift;
    my $accesor = $attr->accessor;
    sub {
        my $self = shift;
        my $array_ref = $self->$accesor();
        scalar @$array_ref;
    };
}


=item generate_array_add_method

=cut

sub generate_array_add_method {
    my $attr = shift;
    my $accesor = $attr->accessor;
    my $accessor = $attr->accessor;
    my $the_other_end = $attr->the_other_end;
    my $associated_class = $attr->associated_class;
    sub {
        my ($self, @values) = @_;
        my $array_ref = $self->$accesor();
        foreach my $value (@values) {
            $attr->validate_associated_class($self, $value, $accessor, $associated_class, $the_other_end);
            push @$array_ref, $value;
        }
        $self;
    };
}


=item generate_array_remove_method

=cut

#TODO add on_remove trigger

sub generate_array_remove_method {
    my $attr = shift;
    my $accesor = $attr->accessor;
    my $accessor = $attr->accessor;
    my $the_other_end = $attr->the_other_end;
    my $meta =  Abstract::Meta::Class::meta_class($attr->associated_class);
    my $reflective_attribute = $the_other_end && $meta ? $meta->attribute($the_other_end) : undef;
    sub {
        my ($self, @values) = @_;
        my $array_ref = $self->$accesor();
        foreach my $value(@values) {
            for my $i (0 .. $#{$array_ref}) {
                if ($array_ref->[$i] && $array_ref->[$i] eq $value) {
                    $reflective_attribute->set_value($value, undef)
                        if $reflective_attribute;
                    splice @$array_ref, $i--, 1;
                }
            }
        }
        $self;
    };
}


=item generate

Returns code reference.

=cut

sub generate {
    my ($self, $method_name) = @_;
    my $call = "generate_" . lc($self->perl_type) . "_${method_name}_method";
    $self->$call;
}


=item set_value

Sets value for attribute

=cut

sub set_value {
    my ($attr, $self, $value) = @_;
    my $array_storage_type = $attr->storage_type eq 'Array';
    my $storage_key = $attr->storage_key;