1 files changed, 36 insertions, 0 deletions
diff --git a/testapp/exam/evaluators/language_registry.py b/testapp/exam/evaluators/language_registry.py
new file mode 100644
index 0000000..76a23d7
--- /dev/null
+++ b/testapp/exam/evaluators/language_registry.py
@@ -0,0 +1,36 @@
+from settings import code_evaluators
+import importlib
+
+registry = None
+
+def set_registry():
+    global registry
+    registry = _LanguageRegistry()
+    
+def get_registry():
+    return registry
+
+class _LanguageRegistry(object):
+    def __init__(self):
+        self._register = {}
+        for language, module in code_evaluators.iteritems():
+            self._register[language] = None
+
+    # Public Protocol ##########
+    def get_class(self, language):
+        """ Get the code evaluator class for the given language """
+        if not self._register.get(language):
+            self._register[language] = code_evaluators.get(language)
+
+        cls = self._register[language]
+        module_name, class_name = cls.rsplit(".", 1)
+        # load the module, will raise ImportError if module cannot be loaded
+        get_module = importlib.import_module(module_name)
+        # get the class, will raise AttributeError if class cannot be found
+        get_class = getattr(get_module, class_name)
+        return get_class
+
+    def register(self, language, class_name):
+        """ Register a new code evaluator class for language"""
+        self._register[language] = class_name
+