1 files changed, 156 insertions, 0 deletions
diff --git a/lib/Data/MultiValued/AttributeAccessors.pm b/lib/Data/MultiValued/AttributeAccessors.pm
new file mode 100644
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--- /dev/null
+++ b/lib/Data/MultiValued/AttributeAccessors.pm
@@ -0,0 +1,156 @@
+package Data::MultiValued::AttributeAccessors;
+use strict;
+use warnings;
+use base 'Moose::Meta::Method::Accessor';
+use Carp 'confess';
+
+# ABSTRACT: method meta-class for multi-valued attribute accessors
+
+=head1 DESCRIPTION
+
+Subclass of L<Moose::Meta::Method::Accessor>, generates non-inlined
+(patches welcome) accessors for multi-valued attributes.
+
+=head1 METHDOS
+
+=head2 C<_instance_is_inlinable>
+
+Returns C<0> to prevent attempts to inline the accessor methods.
+
+=cut
+
+sub _instance_is_inlinable { 0 }
+
+=head2 C<_generate_accessor_method>
+
+=head2 C<_generate_reader_method>
+
+=head2 C<_generate_writer_method>
+
+=head2 C<_generate_predicate_method>
+
+=head2 C<_generate_clearer_method>
+
+Delegate to C<set_multi_value>, C<get_multi_value>,
+C<has_multi_value>, C<clear_multi_value>, passing empty options
+(i.e. no tags, no ranges).
+
+=cut
+
+sub _generate_accessor_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        if (@_ >= 2) {
+            $attr->set_multi_value($_[0], {}, $_[1]);
+        }
+        $attr->get_multi_value($_[0], {});
+    }
+}
+
+sub _generate_reader_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        confess "Cannot assign a value to a read-only accessor"
+            if @_ > 1;
+        $attr->get_multi_value($_[0], {});
+    };
+}
+
+sub _generate_writer_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        $attr->set_multi_value($_[0], {}, $_[1]);
+    };
+}
+
+sub _generate_predicate_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        $attr->has_multi_value($_[0], {})
+    };
+}
+
+sub _generate_clearer_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        $attr->clear_multi_value($_[0], {})
+    };
+}
+
+=head2 C<_generate_multi_accessor_method>
+
+=head2 C<_generate_multi_reader_method>
+
+=head2 C<_generate_multi_writer_method>
+
+=head2 C<_generate_multi_predicate_method>
+
+=head2 C<_generate_multi_clearer_method>
+
+Delegate to C<set_multi_value>, C<get_multi_value>,
+C<has_multi_value>, C<clear_multi_value>, passing C<$_[1]> as options
+and C<$_[2]> as values.
+
+=cut
+
+sub _generate_multi_accessor_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        if (@_ >= 3) {
+            $attr->set_multi_value($_[0], $_[1], $_[2]);
+        }
+        $attr->get_multi_value($_[0],$_[1]);
+    }
+}
+
+sub _generate_multi_reader_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        confess "Cannot assign a value to a read-only accessor"
+            if @_ > 2;
+        $attr->get_multi_value($_[0],$_[1]);
+    };
+}
+
+sub _generate_multi_writer_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        $attr->set_multi_value($_[0], $_[1], $_[2]);
+    };
+}
+
+sub _generate_multi_predicate_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        $attr->has_multi_value($_[0],$_[1])
+    };
+}
+
+sub _generate_multi_clearer_method {
+    my $self = shift;
+    my $attr = $self->associated_attribute;
+
+    return sub {
+        $attr->clear_multi_value($_[0],$_[1])
+    };
+}
+
+1;