1 files changed, 23 insertions, 0 deletions
diff --git a/lib/dataset_cache.rb b/lib/dataset_cache.rb
new file mode 100644
index 0000000..1af1d51
--- /dev/null
+++ b/lib/dataset_cache.rb
@@ -0,0 +1,23 @@
+
+module Lib
+  
+  module DatasetCache
+    
+    @@cache={}
+
+    # same as OpenTox::Dataset.find with caching function
+    # rational: datasets are reused in crossvalidation very often, cache to save computational effort
+    # PENDING: may cause memory issues, test with huge datasets 
+    def self.find(dataset_uri, subjectid=nil)
+      return nil if (dataset_uri==nil)
+      d = @@cache[dataset_uri.to_s+"_"+subjectid.to_s]
+      if d==nil
+        d = OpenTox::Dataset.find(dataset_uri, subjectid)
+        @@cache[dataset_uri.to_s+"_"+subjectid.to_s] = d
+      end
+      d
+    end
+    
+  end
+  
+end
+\ No newline at end of file