1 files changed, 76 insertions, 0 deletions
diff --git a/Data-MultiValued/lib/Data/MultiValued/TagContainer.pm b/Data-MultiValued/lib/Data/MultiValued/TagContainer.pm
new file mode 100644
index 0000000..e0c7f4f
--- /dev/null
+++ b/Data-MultiValued/lib/Data/MultiValued/TagContainer.pm
@@ -0,0 +1,76 @@
+package Data::MultiValued::TagContainer;
+use Moose;
+use Moose::Util::TypeConstraints;
+use MooseX::Types::Moose qw(HashRef);
+use Data::MultiValued::Exceptions;
+
+has _storage => (
+    is => 'rw',
+    isa => HashRef,
+    init_arg => undef,
+    default => sub { { } },
+    traits => ['Hash'],
+    handles => {
+        _has_tag => 'exists',
+        _get_tag => 'get',
+        _create_tag => 'set',
+    },
+);
+
+has _default_tag => (
+    is => 'rw',
+    init_arg => undef,
+    predicate => '_has_default_tag',
+);
+
+sub get {
+    my ($self,$args) = @_;
+
+    my $tag = $args->{tag};
+
+    if (!defined($tag)) {
+        if ($self->_has_default_tag) {
+            return $self->_default_tag;
+        }
+
+        Data::MultiValued::Exceptions::TagNotFound->throw({
+            value => $tag,
+        });
+    }
+
+    if (!$self->_has_tag($tag)) {
+        Data::MultiValued::Exceptions::TagNotFound->throw({
+            value => $tag,
+        });
+    }
+    return $self->_get_tag($tag);
+}
+
+sub get_or_create {
+    my ($self,$args) = @_;
+
+    my $tag = $args->{tag};
+
+    if (!defined($tag)) {
+        if ($self->_has_default_tag) {
+            return $self->_default_tag;
+        }
+        else {
+            return $self->_default_tag(
+                $self->_create_new_inferior
+            );
+        }
+    }
+
+    if (!$self->_has_tag($tag)) {
+        $self->_create_tag($tag,$self->_create_new_inferior);
+    }
+    return $self->_get_tag($tag);
+}
+
+sub _create_new_inferior {
+    my ($self) = @_;
+    return {};
+}
+
+1;