statement.rb in rdf-0.0.9

- old
+ new

@@ -125,9 +125,18 @@
     def has_object?
       !!object
     end
 
     ##
+    # Returns `true` if the subject or object of this statement is a blank
+    # node.
+    #
+    # @return [Boolean]
+    def has_blank_nodes?
+      (has_object? && object.node?) || (has_subject? && subject.node?)
+    end
+
+    ##
     # @param  [Statement] other
     # @return [Boolean]
     def eql?(other)
       other.is_a?(Statement) && self == other
     end