01: /*
02: * ====================================================================
03: *
04: * The Apache Software License, Version 1.1
05: *
06: * Copyright (c) 1999-2003 The Apache Software Foundation.
07: * All rights reserved.
08: *
09: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: *
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: *
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in
18: * the documentation and/or other materials provided with the
19: * distribution.
20: *
21: * 3. The end-user documentation included with the redistribution, if
22: * any, must include the following acknowledgement:
23: * "This product includes software developed by the
24: * Apache Software Foundation (http://www.apache.org/)."
25: * Alternately, this acknowledgement may appear in the software itself,
26: * if and wherever such third-party acknowledgements normally appear.
27: *
28: * 4. The names "The Jakarta Project", "Commons", and "Apache Software
29: * Foundation" must not be used to endorse or promote products derived
30: * from this software without prior written permission. For written
31: * permission, please contact apache@apache.org.
32: *
33: * 5. Products derived from this software may not be called "Apache"
34: * nor may "Apache" appear in their names without prior written
35: * permission of the Apache Software Foundation.
36: *
37: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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41: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48: * SUCH DAMAGE.
49: * ====================================================================
50: *
51: * This software consists of voluntary contributions made by many
52: * individuals on behalf of the Apache Software Foundation. For more
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54: * <http://www.apache.org/>.
55: *
56: */
57:
58: package org.apache.commons.jrcs.diff.myers;
59:
60: /**
61: * Represents a snake in a diffpath.
62: * <p>
63: * {@link DiffNode DiffNodes} and {@link Snake Snakes} allow for compression of
64: * diffpaths, as each snake is represented by a single {@link Snake Snake} node
65: * and each contiguous series of insertions and deletions is represented by a
66: * single {@link DiffNode DiffNodes}.
67: *
68: * @version $Revision: 7756 $ $Date: 2006-04-12 18:30:19 +0100 (Wed, 12 Apr
69: * 2006) $
70: * @author <a href="mailto:juanco@suigeneris.org">Juanco Anez</a>
71: */
72: public final class Snake extends PathNode {
73: /**
74: * Constructs a snake node.
75: *
76: * @param the
77: * position in the original sequence
78: * @param the
79: * position in the revised sequence
80: * @param prev
81: * the previous node in the path.
82: */
83: public Snake(int i, int j, PathNode prev) {
84: super (i, j, prev);
85: }
86:
87: /**
88: * {@inheritDoc}
89: *
90: * @return true always
91: */
92: public boolean isSnake() {
93: return true;
94: }
95:
96: }
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