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


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  * Base class for implenting the <code>CommandLineSwitch</code> interface.
37  */
38 public abstract class CommandLineSwitchBase implements CommandLineSwitch {
39     private Object JavaDoc defaultValue;
40     protected Object JavaDoc value;
41     private boolean present;
42     private boolean mandatory;
43
44     public CommandLineSwitchBase() {
45         this(null, false);
46     }
47
48     public CommandLineSwitchBase(Object JavaDoc defaultValue) {
49         this(defaultValue, false);
50     }
51
52     public CommandLineSwitchBase(boolean mandatory) {
53         this(null, mandatory);
54     }
55
56     public CommandLineSwitchBase(Object JavaDoc defaultValue, boolean mandatory) {
57         this.defaultValue = defaultValue;
58         this.mandatory = mandatory;
59
60         this.value = null;
61
62         isPresent(false);
63     }
64
65     public Object JavaDoc getDefaultValue() {
66         return defaultValue;
67     }
68
69     public Object JavaDoc getValue() {
70         Object JavaDoc result = defaultValue;
71
72         if (value != null) {
73             result = value;
74         }
75
76         return result;
77     }
78
79     public void setValue(Object JavaDoc value) {
80         this.value = value;
81
82         isPresent(true);
83     }
84
85     public boolean isPresent() {
86         return present;
87     }
88
89     protected void isPresent(boolean present) {
90         this.present = present;
91     }
92
93     public boolean isMandatory() {
94         return mandatory;
95     }
96
97     public String JavaDoc toString() {
98         return getValue().toString();
99     }
100 }
101
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