1 /*
2 * Copyright (C) 2010, Google Inc.
3 * Copyright (C) 2008-2009, Johannes E. Schindelin <johannes.schindelin@gmx.de>
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.diff;
46
47 /**
48 * Arbitrary sequence of elements.
49 * <p>
50 * A sequence of elements is defined to contain elements in the index range
51 * <code>[0, {@link #size()})</code>, like a standard Java List implementation.
52 * Unlike a List, the members of the sequence are not directly obtainable.
53 * <p>
54 * Implementations of Sequence are primarily intended for use in content
55 * difference detection algorithms, to produce an
56 * {@link org.eclipse.jgit.diff.EditList} of {@link org.eclipse.jgit.diff.Edit}
57 * instances describing how two Sequence instances differ.
58 * <p>
59 * To be compared against another Sequence of the same type, a supporting
60 * {@link org.eclipse.jgit.diff.SequenceComparator} must also be supplied.
61 */
62 public abstract class Sequence {
63 /** @return total number of items in the sequence. */
64 /**
65 * Get size
66 *
67 * @return size
68 */
69 public abstract int size();
70 }