fix siibra v2 statistic map fetching

Author: xgui3783

api/server/volumes/parcellationmap.py

@@ -96,7 +96,7 @@ def get_parcellation_labelled_map(parcellation_id: str, space_id: str, region_id
 region_id MUST refer to leaf region on the region hierarchy.
 """)
 @version(*FASTAPI_VERSION)
-@router_decorator(ROLE, func=old_get_region_statistic_map)
+@router_decorator(ROLE, func=statistical_map_nii_gz)
 def get_region_statistical_map(parcellation_id: str, region_id: str, space_id: str, name: str="", *, func):
     """Get statistical map according to specification"""
     if func is None:
@@ -120,7 +120,7 @@ class StatisticModelInfo(BaseModel):
 # still use the old worker. New worker not stable (?)
 @router.get("/statistical_map.info.json", response_model=StatisticModelInfo, tags=TAGS)
 @version(*FASTAPI_VERSION)
-@router_decorator(ROLE, func=old_get_region_statistic_map_info)
+@router_decorator(ROLE, func=statistical_map_info_json)
 def get_region_statistical_map_metadata(parcellation_id: str, region_id: str, space_id: str, name: str="", *, func):
     """Get metadata of statistical map according to specification"""
     if func is None:

new_api/data_handlers/maps.py

@@ -37,8 +37,7 @@ def cache_region_statistic_map(parcellation_id: str, region_id: str, space_id: s
     if len(maps) > 1:
         warning_texts = f"Multiple ({len(maps)}) maps found"
     map = maps[0]
-    vol = map.extract_regional_map(region=region_id)
-    volume_data = vol.get_data()
+    volume_data = map.fetch(region=region_id)
 
     error_text = f"{error_text}, with region_id '{region_id}'"
     assert isinstance(volume_data, nib.Nifti1Image), f"{error_text}, volume provided is not of type Nifti1Image"