[file handler] add dtype and shape fields to ItemDescriptor

file_handler.py

@@ -1,11 +1,11 @@
 import os
 import nixio as nix
 from enum import Enum
+import datetime as dt
 
 
 class ItemDescriptor():
-    
-    def __init__(self, name=None, id=None, type=None, value=None, definition=None, block_id=None, entity_type=None) -> None:
+    def __init__(self, name=None, id=None, type=None, value=None, definition=None, block_id=None, entity_type=None, shape=None, metadata=None, data_type=None) -> None:
         super().__init__()
         self.name = name
         self.type = type
@@ -14,6 +14,10 @@ class ItemDescriptor():
         self.definition = definition
         self.value = value
         self.entity_type = entity_type
+        self.data_type = data_type
+        self.shape = shape
+        self.metadata_id = metadata
+
 class FileDescriptor():
     def __init__(self, filename, format, version, created_at, updated_at, size) -> None:
         super().__init__()
@@ -83,6 +87,7 @@ class Singleton(type):
             cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
         return cls._instances[cls]
 
+
 class EntityBuffer():
 
     def __init__(self) -> None:
@@ -117,13 +122,9 @@ class FileHandler(metaclass=Singleton):
         self._nix_file = None
         self._file_requests = []
         self._entity_buffer = EntityBuffer()
+        self._file_descriptor = None
     
     def open(self, filename):
-        """[summary]
-
-        Args:
-            filename ([type]): [description]
-        """
         self.close()
       
         if not os.path.exists(filename):
@@ -157,8 +158,6 @@ class FileHandler(metaclass=Singleton):
 
     @property
     def file_descriptor(self):
-        
-        return ItemDescriptor()
         return self._file_descriptor
 
     @property
@@ -210,6 +209,9 @@ class FileHandler(metaclass=Singleton):
         for e in entities:
             self._entity_buffer.put(e)
             itd = ItemDescriptor(e.name, e.id, e.type, definition=e.definition, entity_type=entity_type, block_id=block_id)
+            itd.metadata_id = e.metadata if hasattr(e, "metadata") else None
+            itd.data_type = e.data_type if hasattr(e, "data_type") else None
+            itd.shape = e.shape if hasattr(e, "shape") else None
             infos.append(itd)
             # TODO set the value to something meaningful for the various entity types
         return infos