Implement Spira::Types::URI

lib/spira/types.rb

@@ -19,6 +19,7 @@ module Types
     require 'spira/types/any'
     require 'spira/types/string'
     require 'spira/types/float'
+    require 'spira/types/uri'
 
 
   end

lib/spira/types/uri.rb

@@ -0,0 +1,25 @@
+module Spira::Types
+
+  ##
+  # This type takes RDF Resource objects and provides RDF::URI objects for the
+  # ruby representation.
+  #
+  # @see Spira::Type
+  # @see http://rdf.rubyforge.org/RDF/URI.html
+  class URI
+
+    include Spira::Type
+
+    def self.unserialize(value)
+      RDF::URI(value)
+    end
+
+    def self.serialize(value)
+      RDF::URI(value)
+    end
+
+    register_alias :uri
+    register_alias RDF::URI
+
+  end
+end

spec/types/uri.spec

@@ -0,0 +1,40 @@
+require File.dirname(__FILE__) + "/../spec_helper.rb"
+
+describe Spira::Types::URI do
+
+  before :each do
+    @uri = RDF::URI('http://example.org/example')
+  end
+
+  context "when serializing" do
+    it "should serialize URIs to URIs" do
+      serialized = Spira::Types::URI.serialize(@uri)
+      serialized.should be_a RDF::URI
+      serialized.should == @uri
+    end
+
+    it "should serialize non-URIs to URIs based on the URI constructor" do
+      serialized = Spira::Types::URI.serialize("test")
+      serialized.should be_a RDF::URI
+      serialized.should == RDF::URI('test')
+    end
+
+  end
+
+  context "when unserializing" do
+    it "should unserialize URIs to themselves" do
+      value = Spira::Types::URI.unserialize(@uri)
+      value.should be_a RDF::URI
+      value.should == @uri
+    end
+
+    it "should unserialize non-URIs to URIs based on the URI constructor" do
+      value = Spira::Types::URI.unserialize("test")
+      value.should be_a RDF::URI
+      value.should == RDF::URI('test')
+    end
+  end
+
+
+end
+