changed method to avoid dublicates in modified date

1 files changed, 4 insertions, 6 deletions

diff --git a/lib/4store.rb b/lib/4store.rb
index f3ab026..77fa045 100644
--- a/lib/4store.rb
+++ b/lib/4store.rb
@@ -43,12 +43,10 @@ module OpenTox
         bad_request_error "Reqest body empty." unless rdf 
         mime_type = "application/x-turtle" if mime_type == "text/plain"
         RestClientWrapper.put File.join(four_store_uri,"data",uri), rdf, :content_type => mime_type
-        # prevent 4store from dublicates
-        # sparql for modified time (DELETE WHERE is not supported)-> delete -> insert new time
-        date = query "SELECT ?date WHERE { <#{uri}> <#{RDF::DC.modified}> ?date }", "application/sparql-results+xml"
-        date = date.match("\<literal\>.*\<\/literal\>").to_s.gsub(/\<literal\>|<\/literal\>/, "")
-        update "DELETE DATA { GRAPH <#{uri}> { <#{uri}> <#{RDF::DC.modified}> \"#{date}\" } }" if date.size >0
-        update "INSERT DATA { GRAPH <#{uri}> { <#{uri}> <#{RDF::DC.modified}> \"#{DateTime.now}\" } }"
+        update "WITH <#{uri}>
+                DELETE {<#{uri}> <{RDF::DC.modified}> ?o}
+                WHERE {<#{uri}> <{RDF::DC.modified}> ?o};
+                INSERT DATA { GRAPH <#{uri}> { <#{uri}> <#{RDF::DC.modified}> \"#{DateTime.now}\" } }"
       end
 
       def self.delete uri