* lib/rss/taxonomy.rb: implemented taxonomy module.

* test/rss/test_taxonomy.rb: added tests for taxonomy support.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9555 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 181 insertions, 15 deletions

diff --git a/lib/rss/taxonomy.rb b/lib/rss/taxonomy.rb
index f70d475a11..d7a5b6d19e 100644
--- a/lib/rss/taxonomy.rb
+++ b/lib/rss/taxonomy.rb
@@ -1,32 +1,198 @@
-# Experimental
-
 require "rss/1.0"
+require "rss/dublincore"
 
 module RSS
 
   TAXO_PREFIX = "taxo"
-  TAXO_NS = "http://purl.org/rss/1.0/modules/taxonomy/"
+  TAXO_URI = "http://purl.org/rss/1.0/modules/taxonomy/"
 
-  Element.install_ns(TAXO_PREFIX, TAXO_NS)
+  RDF.install_ns(TAXO_PREFIX, TAXO_URI)
 
   TAXO_ELEMENTS = []
 
   %w(link).each do |name|
     full_name = "#{TAXO_PREFIX}_#{name}"
-    BaseListener.install_get_text_element(TAXO_NS, name, "#{full_name}=")
+    BaseListener.install_get_text_element(TAXO_URI, name, "#{full_name}=")
+    TAXO_ELEMENTS << "#{TAXO_PREFIX}_#{name}"
+  end
+
+  %w(topic topics).each do |name|
+    class_name = Utils.to_class_name(name)
+    BaseListener.install_class_name(TAXO_URI, name, "Taxo#{class_name}")
     TAXO_ELEMENTS << "#{TAXO_PREFIX}_#{name}"
   end
+
+  module TaxoTopicsModel
+    extend BaseModel
     
-  module TaxonomyModel
-    attr_writer(*%w(title description creator subject publisher
-                    contributor date format identifier source
-                    language relation coverage rights
-                   ).collect{|name| "#{TAXO_PREFIX}_#{name}"})
+    def self.append_features(klass)
+      super
+
+      var_name = "#{TAXO_PREFIX}_topics"
+      klass.install_have_child_element(var_name)
+    end
+
+    def taxo_validate(tags)
+      found_topics = false
+      tags.each do |tag|
+        if tag == "topics"
+          if found_topics
+            raise TooMuchTagError.new(tag, tag_name)
+          else
+            found_topics = true
+          end
+        else
+          raise UnknownTagError.new(tag, TAXO_URI)
+        end
+      end
+    end
+
+    class TaxoTopics < Element
+      include RSS10
+      
+      Bag = ::RSS::RDF::Bag
+
+      class << self
+        def required_prefix
+          TAXO_PREFIX
+        end
+        
+        def required_uri
+          TAXO_URI
+        end
+      end
+
+      @tag_name = "topics"
+      
+      install_have_child_element("Bag")
+        
+      install_must_call_validator('rdf', ::RSS::RDF::URI)
+
+      def initialize(bag=Bag.new)
+        super()
+        @Bag = bag
+      end
+
+      def full_name
+        tag_name_with_prefix(TAXO_PREFIX)
+      end
+      
+      def to_s(need_convert=true, indent=calc_indent)
+        rv = tag(indent) do |next_indent|
+          [
+           Bag_element(need_convert, next_indent),
+           other_element(need_convert, next_indent),
+          ]
+        end
+      end
+
+      private
+      def children
+        [@Bag]
+      end
+
+      def _tags
+        rv = []
+        rv << [::RSS::RDF::URI, 'Bag'] unless @Bag.nil?
+        rv
+      end
+      
+      def rdf_validate(tags)
+        _validate(tags, [["Bag", nil]])
+      end
+    end
   end
   
-  class Channel; extend TaxonomyModel;	end
-  class Item; extend TaxonomyModel;	end
-  class Image; extend TaxonomyModel;	end
-  class TextInput; extend TaxonomyModel;	end
-  
+  module TaxoTopicModel
+    extend BaseModel
+    
+    def self.append_features(klass)
+      super
+      var_name = "#{TAXO_PREFIX}_topic"
+      klass.install_have_children_element(var_name)
+    end
+
+    def taxo_validate(tags)
+      tags.each do |tag|
+        if tag != "topic"
+          raise UnknownTagError.new(tag, TAXO_URI)
+        end
+      end
+    end
+
+    class TaxoTopic < Element
+      include RSS10
+
+      include DublinCoreModel
+      include TaxoTopicsModel
+      
+      class << self
+        def required_prefix
+          TAXO_PREFIX
+        end
+        
+        def required_uri
+          TAXO_URI
+        end
+      end
+
+      @tag_name = "topic"
+
+      install_get_attribute("about", ::RSS::RDF::URI, true)
+      install_text_element("#{TAXO_PREFIX}_link")
+        
+      def initialize(about=nil)
+        super()
+        @about = about
+      end
+
+      def full_name
+        tag_name_with_prefix(TAXO_PREFIX)
+      end
+      
+      def to_s(need_convert=true, indent=calc_indent)
+        rv = tag(indent) do |next_indent|
+          [
+           link_element(need_convert, next_indent),
+           other_element(need_convert, next_indent),
+          ]
+        end
+      end
+
+      def taxo_validate(tags)
+        elements = %w(link topics)
+        counter = {}
+        
+        tags.each do |tag|
+          if elements.include?(tag)
+            counter[tag] ||= 0
+            counter[tag] += 1
+            raise TooMuchTagError.new(tag, tag_name) if counter[tag] > 1
+          else
+            raise UnknownTagError.new(tag, TAXO_URI)
+          end
+        end
+      end
+
+      private
+      def children
+        [@taxo_link, @taxo_topics]
+      end
+
+      def _tags
+        rv = []
+        rv << [TAXO_URI, "link"] unless @taxo_link.nil?
+        rv << [TAXO_URI, "topics"] unless @taxo_topics.nil?
+        rv
+      end
+    end
+  end
+
+  class RDF
+    include TaxoTopicModel
+    class Channel
+      include TaxoTopicsModel
+    end
+    class Item; include TaxoTopicsModel; end
+  end
 end