Coverage Summary for Class: StateRootTranslator (co.rsk.db)
Class |
Class, %
|
Method, %
|
Line, %
|
StateRootTranslator |
100%
(1/1)
|
33.3%
(1/3)
|
25%
(4/16)
|
1 /*
2 * This file is part of RskJ
3 * Copyright (C) 2019 RSK Labs Ltd.
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18 package co.rsk.db;
19
20 import co.rsk.crypto.Keccak256;
21 import org.ethereum.datasource.KeyValueDataSource;
22
23 import java.util.Map;
24
25 public class StateRootTranslator {
26
27 private KeyValueDataSource stateRootDB;
28 private Map<Keccak256, Keccak256> stateRootCache;
29
30 public StateRootTranslator(KeyValueDataSource stateRootDB, Map<Keccak256, Keccak256> stateRootCache) {
31 this.stateRootDB = stateRootDB;
32 this.stateRootCache = stateRootCache;
33 }
34
35 public synchronized Keccak256 get(Keccak256 oldStateRoot) {
36 Keccak256 stateRoot = this.stateRootCache.get(oldStateRoot);
37
38 if (stateRoot != null) {
39 return stateRoot;
40 }
41
42 byte[] stateRootBytes = stateRootDB.get(oldStateRoot.getBytes());
43 if (stateRootBytes == null) {
44 return null;
45 }
46
47 Keccak256 newStateRoot = new Keccak256(stateRootBytes);
48 this.stateRootCache.put(oldStateRoot, newStateRoot);
49 return newStateRoot;
50 }
51
52 public void put(Keccak256 oldStateRoot, Keccak256 newStateRoot) {
53 this.stateRootCache.put(oldStateRoot, newStateRoot);
54 this.stateRootDB.put(oldStateRoot.getBytes(), newStateRoot.getBytes());
55 }
56 }