1 files changed, 36 insertions, 0 deletions
diff --git a/snips_inference_agl/common/abc_utils.py b/snips_inference_agl/common/abc_utils.py
new file mode 100644
index 0000000..db7b933
--- /dev/null
+++ b/snips_inference_agl/common/abc_utils.py
@@ -0,0 +1,36 @@
+class abstractclassmethod(classmethod):  # pylint: disable=invalid-name
+    __isabstractmethod__ = True
+
+    def __init__(self, callable):
+        callable.__isabstractmethod__ = True
+        super(abstractclassmethod, self).__init__(callable)
+
+
+class ClassPropertyDescriptor(object):
+    def __init__(self, fget, fset=None):
+        self.fget = fget
+        self.fset = fset
+
+    def __get__(self, obj, klass=None):
+        if klass is None:
+            klass = type(obj)
+        return self.fget.__get__(obj, klass)()
+
+    def __set__(self, obj, value):
+        if not self.fset:
+            raise AttributeError("can't set attribute")
+        type_ = type(obj)
+        return self.fset.__get__(obj, type_)(value)
+
+    def setter(self, func):
+        if not isinstance(func, (classmethod, staticmethod)):
+            func = classmethod(func)
+        self.fset = func
+        return self
+
+
+def classproperty(func):
+    if not isinstance(func, (classmethod, staticmethod)):
+        func = classmethod(func)
+
+    return ClassPropertyDescriptor(func)