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Java > Open Source Codes > com > jeantessier > commandline > ExactlyParameterStrategy


1 /*
2  * Copyright (c) 2001-2005, Jean Tessier
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
7  * are met:
8  *
9  * * Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  *
12  * * Redistributions in binary form must reproduce the above copyright
13  * notice, this list of conditions and the following disclaimer in the
14  * documentation and/or other materials provided with the distribution.
15  *
16  * * Neither the name of Jean Tessier nor the names of his contributors
17  * may be used to endorse or promote products derived from this software
18  * without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32
33 package com.jeantessier.commandline;
34
35 /**
36  * The command-line must include an exact number of parameters or the
37  * framework will find the command-line invalid.
38  */
39 public class ExactlyParameterStrategy implements CountingParameterStrategy {
40     private int nbParameters;
41     private int count;
42
43     public ExactlyParameterStrategy(int nbParameters) {
44         this.nbParameters = nbParameters;
45
46         this.count = 0;
47     }
48
49     public boolean accept(String JavaDoc param) {
50         count++;
51
52         return count <= nbParameters;
53     }
54
55     public boolean isSatisfied() {
56         return count == nbParameters;
57     }
58
59     public int getNbParameters() {
60         return nbParameters;
61     }
62
63     public int getCount() {
64         return count;
65     }
66
67     public void accept(Visitor visitor) {
68         visitor.visitExactlyParameterStrategy(this);
69     }
70 }
71
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