Commit 90c9335

@@ -1,21 +0,0 @@
-import 'dart:collection';
-
-import 'package:health_data_store/health_data_store.dart';
-
-/// A data provider provides access to the data.
-///
-/// It interacts with the databases on a low level and only supports basic CRUD
-/// operations.
-///
-/// Tables are structured in a way that they have a id ([int]) as a primary
-/// key and have one or more other columns associated with that key.
-abstract class DataProvider<T> {
-  /// Gets all entries in the inclusive range.
-  Future<UnmodifiableListView<(int,T)>> getInRange(DateRange range);
-
-  /// Sets the data at [entryID] to [value].
-  Future<void> set(int entryID, T value);
-
-  /// Removes the value associated with this [entryID].
-  Future<void> remove(int entryID);
-}

@@ -0,0 +1,25 @@
+import 'package:health_data_store/src/types/date_range.dart';
+
+/// The meta repository contains metadata about the stored data.
+///
+/// This includes data such as ranges in which events exist and what type of
+/// data was collected during a event.
+class MetaRepository {
+  DateRange get availableRange {
+    // TODO
+    throw UnimplementedError();
+  }
+
+  DateTime get firstEntry {
+    // TODO
+    throw UnimplementedError();
+  }
+
+  DateRange get lastEntry {
+    // TODO
+    throw UnimplementedError();
+  }
+
+  // TODO: check what is needed
+
+}

@@ -1,11 +1,11 @@
 import 'dart:collection';
 
-import 'package:health_data_store/src/data_providers/data_provider.dart';
+import 'package:health_data_store/src/database_manager.dart';
 import 'package:health_data_store/src/types/date_range.dart';
 
-/// A repository is a abstraction around multiple [DataProvider]s.
+/// A repository is a abstraction around the [DatabaseManager]
 ///
-/// Repositories wrap the primitive values of [DataProvider]s into more complex
+/// Repositories wrap the primitive values of DB fields into more complex
 /// types and provides domain models for the application.
 abstract class Repository<T> {
   /// Adds a new value to the repository.

@@ -3,12 +3,12 @@ import 'package:sqflite_common/sqflite.dart';
 
 // TODO: document once finished
 abstract class HealthDataStore {
-
   const HealthDataStore._create();
 
   /// Initializes objects from [db].
   ///
-  /// [db] must be exclusive to the package and will be initialized by it.
+  /// [db] must be exclusive to the package and will be initialized by it. The
+  /// library maintains the version and is responsible for update operations.
   static Future<HealthDataStore?> load(Database db) async {
     if (!db.isOpen) return null;
     // TODO