1 /*
2 * Copyright (C) 2009, Google Inc.
3 * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
4 * and other copyright owners as documented in the project's IP log.
5 *
6 * This program and the accompanying materials are made available
7 * under the terms of the Eclipse Distribution License v1.0 which
8 * accompanies this distribution, is reproduced below, and is
9 * available at http://www.eclipse.org/org/documents/edl-v10.php
10 *
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials provided
23 * with the distribution.
24 *
25 * - Neither the name of the Eclipse Foundation, Inc. nor the
26 * names of its contributors may be used to endorse or promote
27 * products derived from this software without specific prior
28 * written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
31 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
32 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
33 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
35 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
37 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
38 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
39 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
42 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 */
44
45 package org.eclipse.jgit.pgm.opt;
46
47 import java.io.IOException;
48
49 import org.eclipse.jgit.errors.IncorrectObjectTypeException;
50 import org.eclipse.jgit.errors.MissingObjectException;
51 import org.eclipse.jgit.lib.ObjectId;
52 import org.eclipse.jgit.pgm.internal.CLIText;
53 import org.eclipse.jgit.revwalk.RevTree;
54 import org.kohsuke.args4j.CmdLineException;
55 import org.kohsuke.args4j.CmdLineParser;
56 import org.kohsuke.args4j.OptionDef;
57 import org.kohsuke.args4j.spi.OptionHandler;
58 import org.kohsuke.args4j.spi.Parameters;
59 import org.kohsuke.args4j.spi.Setter;
60
61 /**
62 * Custom argument handler {@link org.eclipse.jgit.revwalk.RevTree} from string
63 * values.
64 * <p>
65 * Assumes the parser has been initialized with a Repository.
66 */
67 public class RevTreeHandler extends OptionHandler<RevTree> {
68 private final org.eclipse.jgit.pgm.opt.CmdLineParser clp;
69
70 /**
71 * Create a new handler for the command name.
72 * <p>
73 * This constructor is used only by args4j.
74 *
75 * @param parser
76 * a {@link org.kohsuke.args4j.CmdLineParser} object.
77 * @param option
78 * a {@link org.kohsuke.args4j.OptionDef} object.
79 * @param setter
80 * a {@link org.kohsuke.args4j.spi.Setter} object.
81 */
82 public RevTreeHandler(final CmdLineParser parser, final OptionDef option,
83 final Setter<? super RevTree> setter) {
84 super(parser, option, setter);
85 clp = (org.eclipse.jgit.pgm.opt.CmdLineParser) parser;
86 }
87
88 /** {@inheritDoc} */
89 @Override
90 public int parseArguments(Parameters params) throws CmdLineException {
91 final String name = params.getParameter(0);
92 final ObjectId id;
93 try {
94 id = clp.getRepository().resolve(name);
95 } catch (IOException e) {
96 throw new CmdLineException(clp, CLIText.format(e.getMessage()));
97 }
98 if (id == null)
99 throw new CmdLineException(clp,
100 CLIText.format(CLIText.get().notATree), name);
101
102 final RevTree c;
103 try {
104 c = clp.getRevWalk().parseTree(id);
105 } catch (MissingObjectException e) {
106 throw new CmdLineException(clp,
107 CLIText.format(CLIText.get().notATree), name);
108 } catch (IncorrectObjectTypeException e) {
109 throw new CmdLineException(clp,
110 CLIText.format(CLIText.get().notATree), name);
111 } catch (IOException e) {
112 throw new CmdLineException(clp,
113 CLIText.format(CLIText.get().cannotReadBecause), name,
114 e.getMessage());
115 }
116 setter.addValue(c);
117 return 1;
118 }
119
120 /** {@inheritDoc} */
121 @Override
122 public String getDefaultMetaVariable() {
123 return CLIText.get().metaVar_treeish;
124 }
125 }