Fix sampling and product interface

flamapy/core/operations/products.py

@@ -1,7 +1,7 @@
 from abc import abstractmethod
-from typing import Any
 
 from flamapy.core.operations import Operation
+from flamapy.metamodels.configuration_metamodel.models.configuration import Configuration
 
 
 class Products(Operation):
@@ -11,5 +11,5 @@ def __init__(self) -> None:
         pass
 
     @abstractmethod
-    def get_products(self) -> list[Any]:
+    def get_products(self) -> list[Configuration]:
         pass

flamapy/core/operations/sampling.py

@@ -1,5 +1,4 @@
 from abc import abstractmethod
-from typing import Optional
 
 from flamapy.metamodels.configuration_metamodel.models.configuration import Configuration
 from flamapy.core.operations import Operation
@@ -11,12 +10,21 @@ class Sampling(Operation):
     """
 
     @abstractmethod
-    def sample(self, size: int, with_replacement: bool = False,
-               partial_configuration: Optional[Configuration] = None) -> list[Configuration]:
-        """Return a sample of configurations.
-
-        Keyword arguments:
-        size -- number of configurations of the sample.
-        with_replacement -- allow repeated configurations in the sample (default False).
-        partial_configuration -- from which the sample is built (default empty configuration).
-        """
+    def __init__(self) -> None:
+        pass
+
+    @abstractmethod
+    def set_sample_size(self, sample_size: int) -> None:
+        """Number of configurations of the sample."""
+
+    @abstractmethod
+    def set_with_replacement(self, with_replacement: bool) -> None:
+        "Allow repeated configurations in the sample (default False)."
+
+    @abstractmethod
+    def set_partial_configuration(self, partial_configuration: Configuration) -> None:
+        "From which the sample is built (default empty configuration)."
+
+    @abstractmethod
+    def get_sample(self) -> list[Configuration]:
+        """Return a sample of configurations."""