| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.gora.persistency; |
| |
| import java.util.Map; |
| |
| /** |
| * StatefulMap extends the Map interface to keep track of the |
| * persistency states of individual elements in the Map. |
| */ |
| public interface StatefulMap<K, V> extends Map<K, V> { |
| |
| State getState(K key); |
| |
| void putState(K key, State state); |
| |
| Map<K, State> states(); |
| |
| void clearStates(); |
| |
| /** |
| * Reuse will clear the map completely with states. This is different |
| * from {@link #clear()} in that the latter only sets entries to deleted. |
| */ |
| void reuse(); |
| |
| } |