sampling mode domain added

pina/domain/domain_interface.py

@@ -9,6 +9,30 @@ class DomainInterface(metaclass=ABCMeta):
     Any geometry entity should inherit from this class.
     """
 
+    __available_sampling_modes = ["random", "grid", "lh", "chebyshev", "latin"]
+
+    @property
+    @abstractmethod
+    def sample_modes(self):
+        """
+        Abstract method returing available samples modes for the Domain.
+        """
+        pass
+
+    @sample_modes.setter
+    def sample_modes(self, values):
+        """
+        TODO
+        """
+        if not isinstance(values, (list, tuple)):
+            values = [values]
+        for value in values:
+            if value not in DomainInterface.__available_sampling_modes:
+                raise TypeError(f"mode {value} not valid. Expected at least "
+                                "one in "
+                                f"{DomainInterface.__available_sampling_modes}."
+                                )
+
     @abstractmethod
     def sample(self):
         """