1 /*
2
3 dsh-graph-io Directed graph readers and writers.
4 Copyright (c) 2008-2013 held jointly by the individual authors.
5
6 This library is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 3 of the License, or (at
9 your option) any later version.
10
11 This library is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
14 License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with this library; if not, write to the Free Software Foundation,
18 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
19
20 > http://www.fsf.org/licensing/licenses/lgpl.html
21 > http://www.opensource.org/licenses/lgpl-license.php
22
23 */
24 package org.dishevelled.graph.io.ygraphml;
25
26 /**
27 * Arrows.
28 *
29 * @author Michael Heuer
30 * @version $Revision$ $Date$
31 */
32 public final class Arrows
33 {
34 /** Source for this arrows. */
35 private final String source;
36
37 /** Target for this arrows. */
38 private final String target;
39
40
41 /**
42 * Create a new arrows from the specified parameters.
43 *
44 * @param source source for this arrows, must not be null
45 * @param target target for this arrows, must not be null
46 */
47 public Arrows(final String source, final String target)
48 {
49 if (source == null)
50 {
51 throw new IllegalArgumentException("source must not be null");
52 }
53 if (target == null)
54 {
55 throw new IllegalArgumentException("target must not be null");
56 }
57 this.source = source;
58 this.target = target;
59 }
60
61
62 /**
63 * Return the source for this arrows.
64 * The source will not be null.
65 *
66 * @return the source for this arrows
67 */
68 public String getSource()
69 {
70 return source;
71 }
72
73 /**
74 * Return the target for this arrows.
75 * The target will not be null.
76 *
77 * @return the target for this arrows
78 */
79 public String getTarget()
80 {
81 return target;
82 }
83 }