Adding result class

force_bdss/data_sources/base_data_source.py

@@ -12,5 +12,8 @@ class BaseDataSource(six.with_metaclass(abc.ABCMeta)):
     def name(self):
         return self.bundle.name
 
+    @abc.abstractmethod
     def run(self):
+        """Executes the data source evaluation/fetching and returns
+        the list of results as a DataSourceResult instance."""
         pass

force_bdss/data_sources/data_source_result.py

+from traits.api import HasTraits, Array, List, String, Instance
+
+from .base_data_source import BaseDataSource
+
+
+class DataSourceResult(HasTraits):
+    """Represents the result of a simulator.
+    It contains the resulting cuba key, the associated uncertainty and the
+    originating simulator.
+    Difference between uncertainty and quality: uncertainty is a numerical value
+    of the value, as in the case of an experimental simulation.
+    quality is the level of accuracy of the (e.g.c omputational) method, as
+    the importance and reliability of that value. It should be an enumeration
+    value such as HIGH, MEDIUM, POOR"""
+
+    originator = Instance(BaseDataSource)
+    value_types = List(String)
+    results = Array(shape=(None, None))
+    accuracy = Array(shape=(None, None))
+    quality = Array(shape=(None, None))
+
+