Argument | Line # 47 | 0 | 1 | - |
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1 | /* | |
2 | * Copyright (c) 2000-2005, University of Salford | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions are met: | |
7 | * | |
8 | * Redistributions of source code must retain the above copyright notice, this | |
9 | * list of conditions and the following disclaimer. | |
10 | * | |
11 | * Redistributions in binary form must reproduce the above copyright notice, | |
12 | * this list of conditions and the following disclaimer in the documentation | |
13 | * and/or other materials provided with the distribution. | |
14 | * | |
15 | * Neither the name of the University of Salford nor the names of its | |
16 | * contributors may be used to endorse or promote products derived from this | |
17 | * software without specific prior written permission. | |
18 | * | |
19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
29 | * POSSIBILITY OF SUCH DAMAGE. | |
30 | */ | |
31 | ||
32 | package issrg.pba.rbac; | |
33 | ||
34 | /** | |
35 | * This interface is the abstract argument to an Action. It knows its type and | |
36 | * its value. However, there is still some confusion about how the value should | |
37 | * be returned and this may be updated in later versions. | |
38 | * | |
39 | * <p>The Argument is deployed in IF-statements only. | |
40 | * | |
41 | * @author E Ball | |
42 | * @author D W Chadwick | |
43 | * @author A Otenko | |
44 | * @version 0.2 | |
45 | */ | |
46 | ||
47 | public interface Argument { | |
48 | ||
49 | /** | |
50 | * This method gets the type of the argument. | |
51 | * | |
52 | * @return the string name of the argument type | |
53 | */ | |
54 | public abstract String getType(); | |
55 | ||
56 | /** | |
57 | * This method gets the string encoding of the value of the argument. | |
58 | * This may be needed for output purposes only. | |
59 | * It is suggested to better override <code>equals</code> method of | |
60 | * <code>java.lang.Object</code> to make comparisons more efficient. | |
61 | * | |
62 | * @return the string representation of the value; the encoding must | |
63 | * correspond to that which would be used in XML | |
64 | */ | |
65 | public abstract String getValue(); | |
66 | } |
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