Provide construction api endpoint.

cml/__init__.py

 from cml.controller import load_settings
 from cml.controller import get_data_source
+from cml.controller import construction
 
 # TODO (dmt): Load default settings automatically.

cml/controller/api.py

@@ -9,6 +9,7 @@ from cml.usecases.query import (
     CreateConstructorUsecase
 )
 from cml.ports.source_adapters import PandasAdapter
+from cml.ports.scikit_adapter import ConstructionClusteringMLModel
 from cml.shared.settings import Settings
 from cml.shared.settings import specific_settings_factory, read_settings
 from cml.shared.request import (
@@ -75,8 +76,13 @@ def get_data_source():
     return preprocessing_usecase.execute(preprocessing_req)
 
 
-def construction():
-    pass
+def construction(*args):
+    ml_models = [ConstructionClusteringMLModel(raw_model) for raw_model in args]
+    construction_settings = specific_settings_factory("construction")
+    create_constructor_req = CreateConstructorRequest(construction_settings,
+                                                      ml_models)
+    create_construction_usecase = CreateConstructorUsecase()
+    return create_construction_usecase.execute(create_constructor_req)
 
 
 def reconstruction():