container.rb in rdf-ldp-0.3.0

- old
+ new

@@ -1,6 +1,20 @@
 module RDF::LDP
+  ##
+  # An LDP Basic Container. This also serves as a base class for other 
+  # container types. Containers are implemented as `RDF::LDP::RDFSources` with
+  # the ability to contain other resources.
+  #
+  # Containers respond to `#post`, allowing new resources to be added to them.
+  # On the public interface (not running through HTTP/`#request`), this is 
+  # supported by `#add` and `#remove`.
+  #
+  # Containers will throw errors when attempting to edit them in conflict with
+  # LDP's restrictions on changing containment triples.
+  #
+  # @see http://www.w3.org/TR/ldp/#dfn-linked-data-platform-container definition
+  #   of LDP Container
   class Container < RDFSource
     ##
     # @return [RDF::URI] uri with lexical representation 
     #   'http://www.w3.org/ns/ldp#Container'
     def self.to_uri
@@ -97,9 +111,25 @@
     def make_containment_triple(resource)
       RDF::Statement(subject_uri, RDF::Vocab::LDP.contains, resource)
     end
 
     private
+
+    def patch(status, headers, env)
+      check_precondition!(env)
+      method = patch_types[env['CONTENT_TYPE']]
+
+      raise UnsupportedMediaType unless method
+
+      temp_graph = RDF::Graph.new << graph.statements
+      send(method, env['rack.input'], temp_graph)
+
+      validate_triples!(temp_graph)
+      graph.clear!
+      graph << temp_graph.statements
+
+      [200, update_headers(headers), self]
+    end
 
     ##
     # Handles a POST request. Parses a graph in the body of `env` and treats all
     # statements in that graph (irrespective of any graph names) as constituting
     # the initial state of the created source.