Implemented SheerkaOntology

src/cache/ListCache.py

@@ -1,4 +1,6 @@
 from cache.Cache import BaseCache
+from core.global_symbols import Removed, NotFound
+from core.utils import sheerka_deepcopy
 
 
 class ListCache(BaseCache):
@@ -8,12 +10,17 @@ class ListCache(BaseCache):
     Items of this cache are list
     """
 
-    def _put(self, key, value):
+    def _put(self, key, value, alt_sdp):
         if key in self._cache:
             self._cache[key].append(value)
         else:
             self._sync(key)
 
+            if key not in self._cache and alt_sdp and not self._is_cleared:
+                previous = self._alt_sdp_get(alt_sdp, key)
+                if previous not in (NotFound, Removed):
+                    self._cache[key] = sheerka_deepcopy(previous)
+
             if key in self._cache:
                 self._cache[key].append(value)
             else:
@@ -22,18 +29,33 @@ class ListCache(BaseCache):
         self._add_to_add(key)
         return True
 
-    def _update(self, old_key, old_value, new_key, new_value):
+    def _update(self, old_key, old_value, new_key, new_value, alt_sdp):
         self._sync(old_key, new_key)
 
+        if old_key not in self._cache and alt_sdp and not self._is_cleared:
+            # no value found in local cache or remote repository
+            # Use the values from alt_sdp
+            previous = self._alt_sdp_get(alt_sdp, old_key)
+            if previous in (NotFound, Removed):
+                raise KeyError(old_key)
+
+            self._cache[old_key] = sheerka_deepcopy(previous)
+            self._current_size += len(previous)
+
         if old_key != new_key:
             self._cache[old_key].remove(old_value)
             if len(self._cache[old_key]) == 0:
-                del (self._cache[old_key])
-                self._add_to_remove(old_key)
+                if not self._is_cleared and alt_sdp and self._extend_exists(alt_sdp, old_key):
+                    self._cache[old_key] = Removed
+                    self._add_to_add(old_key)
+                    self._current_size += 1
+                else:
+                    del (self._cache[old_key])
+                    self._add_to_remove(old_key)
             else:
                 self._add_to_add(old_key)
 
-            self._put(new_key, new_value)
+            self._put(new_key, new_value, alt_sdp)
             self._add_to_add(new_key)
         else:
             for i in range(len(self._cache[new_key])):