1 /*
2 * #%L
3 * JavaHg
4 * %%
5 * Copyright (C) 2011 aragost Trifork ag
6 * %%
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 * #L%
25 */
26 package com.aragost.javahg.commands;
27
28 import java.io.IOException;
29
30 import com.aragost.javahg.Changeset;
31 import com.aragost.javahg.Repository;
32 import com.aragost.javahg.commands.flags.RollbackCommandFlags;
33 import com.aragost.javahg.internals.HgInputStream;
34 import com.aragost.javahg.internals.RuntimeIOException;
35 import com.aragost.javahg.internals.Utils;
36
37 /**
38 * Command class for executing <tt>hg rollback</tt>. Set flags from
39 * {@link RollbackCommandFlags} and call the{@link #execute} method.
40 */
41 public class RollbackCommand extends RollbackCommandFlags {
42
43 private static final byte[] REPOSITORY_TIP_ROLLBACK_REVSION = "repository tip rolled back to revision ".getBytes();
44
45 /**
46 * @param repository
47 * the repository associated with this command.
48 */
49 public RollbackCommand(Repository repository) {
50 super(repository);
51 }
52
53 /**
54 * Rollback last transaction.
55 *
56 * @return The new tip of the repository
57 */
58 public Changeset execute() {
59 HgInputStream stream = launchStream();
60 try {
61 stream.mustMatch(REPOSITORY_TIP_ROLLBACK_REVSION);
62 int rev = stream.decimalIntUpTo(' ');
63 stream.consumeAll();
64 return Utils.single(LogCommand.on(getRepository()).rev(String.valueOf(rev)).execute());
65 } catch (IOException e) {
66 throw new RuntimeIOException(e);
67 }
68 }
69
70 }