--- a/python/storage.py	Wed Jul 13 23:45:47 2016 -0400
+++ b/python/storage.py	Thu Jul 14 00:34:59 2016 -0400
@@ -364,21 +364,44 @@
         printDBError(error)
     connection.close()
 
-def savePrototypesToSqlite(filename, prototypes, trajectoryType = 'feature'):
-    'Work in progress, do not use'
+def savePrototypesToSqlite(filename, prototypeIndices, trajectoryType, nMatchings = None):
+    '''save the prototype indices
+    nMatchings, if not None, is a dictionnary between indices and number of matches'''
     connection = sqlite3.connect(filename)
     cursor = connection.cursor()
     try:
-        cursor.execute('CREATE TABLE IF NOT EXISTS prototypes (id INTEGER PRIMARY KEY, object_id INTEGER, trajectory_id INTEGER, nMatchings INTEGER, FOREIGN KEY(object_id) REFERENCES objects(id), FOREIGN KEY(trajectory_id) REFERENCES positions(trajectory_id))')
-        #for inter in interactions:
-        #    saveInteraction(cursor, inter)
+        cursor.execute('CREATE TABLE IF NOT EXISTS prototypes (id INTEGER PRIMARY KEY, trajectory_type VARCHAR CHECK (trajectory_type IN (\"feature\", \"object\")), nMatchings INTEGER)')
+        for i in prototypeIndices:
+            if nMatchings is not None:
+                n = nMatchings[i]
+            else:
+                n = 'NULL'
+            cursor.execute('INSERT INTO prototypes (id, trajectory_type, nMatchings) VALUES ({},\"{}\",{})'.format(i, trajectoryType, n))
     except sqlite3.OperationalError as error:
         printDBError(error)
     connection.commit()
     connection.close()
 
 def loadPrototypesFromSqlite(filename):
-    pass
+    'Loads prototype ids and matchings (if stored)'
+    connection = sqlite3.connect(filename)
+    cursor = connection.cursor()
+    prototypeIndices = []
+    trajectoryTypes = []
+    nMatchings = {}
+    try:
+        cursor.execute('SELECT * FROM prototypes')
+        for row in cursor:
+            prototypeIndices.append(row[0])
+            trajectoryTypes.append(row[1])
+            if row[2] is not None:
+                nMatchings[row[0]] = row[2]
+    except sqlite3.OperationalError as error:
+        printDBError(error)
+    connection.close()
+    if len(set(trajectoryTypes)) > 1:
+        print('Different types of prototypes in database ({}).'.format(set(trajectoryTypes)))
+    return prototypeIndices, trajectoryTypes[0], nMatchings
 
 def loadBBMovingObjectsFromSqlite(filename, objectType = 'bb', objectNumbers = None, timeStep = None):
     '''Loads bounding box moving object from an SQLite
@@ -418,6 +441,8 @@
             dropTables(connection, ['bounding_boxes'])
         elif dataType == 'pois':
             dropTables(connection, ['gaussians2d'])
+        elif dataType == 'prototype':
+            dropTables(connection, ['prototypes'])
         else:
             print('Unknown data type {} to delete from database'.format(dataType))
         connection.close()