1 /*
2 * Copyright (C) 2011, Ketan Padegaonkar <ketanpadegaonkar@gmail.com>
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43 package org.eclipse.jgit.api;
44
45 import java.io.IOException;
46 import java.util.ArrayList;
47 import java.util.Collections;
48 import java.util.Comparator;
49 import java.util.List;
50
51 import org.eclipse.jgit.api.errors.GitAPIException;
52 import org.eclipse.jgit.api.errors.JGitInternalException;
53 import org.eclipse.jgit.lib.Constants;
54 import org.eclipse.jgit.lib.Ref;
55 import org.eclipse.jgit.lib.Repository;
56 import org.eclipse.jgit.revwalk.RevWalk;
57
58 /**
59 * Used to obtain a list of tags.
60 *
61 * @see <a href="http://www.kernel.org/pub/software/scm/git/docs/git-tag.html"
62 * >Git documentation about Tag</a>
63 */
64 public class ListTagCommand extends GitCommand<List<Ref>> {
65
66 /**
67 * Constructor for ListTagCommand.
68 *
69 * @param repo
70 * a {@link org.eclipse.jgit.lib.Repository} object.
71 */
72 protected ListTagCommand(Repository repo) {
73 super(repo);
74 }
75
76 /** {@inheritDoc} */
77 @Override
78 public List<Ref> call() throws GitAPIException {
79 checkCallable();
80 List<Ref> tags = new ArrayList<>();
81 try (RevWalk revWalk = new RevWalk(repo)) {
82 List<Ref> refList = repo.getRefDatabase()
83 .getRefsByPrefix(Constants.R_TAGS);
84 for (Ref ref : refList) {
85 tags.add(ref);
86 }
87 } catch (IOException e) {
88 throw new JGitInternalException(e.getMessage(), e);
89 }
90 Collections.sort(tags, new Comparator<Ref>() {
91 @Override
92 public int compare(Ref o1, Ref o2) {
93 return o1.getName().compareTo(o2.getName());
94 }
95 });
96 setCallable(false);
97 return tags;
98 }
99
100 }