01: /*
02: * Copyright (c) 2001-2007, Jean Tessier
03: * All rights reserved.
04: *
05: * Redistribution and use in source and binary forms, with or without
06: * modification, are permitted provided that the following conditions
07: * are met:
08: *
09: * * 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 switch can appear by itself or followed by a value. It can only
37: * appear once on the command-line.
38: */
39: public class OptionalValueSwitch extends CommandLineSwitchBase {
40: public OptionalValueSwitch(String name) {
41: this (name, "", false);
42: }
43:
44: public OptionalValueSwitch(String name, String defaultValue) {
45: this (name, defaultValue, false);
46: }
47:
48: public OptionalValueSwitch(String name, boolean mandatory) {
49: this (name, "", mandatory);
50: }
51:
52: public OptionalValueSwitch(String name, String defaultValue,
53: boolean mandatory) {
54: super (name, defaultValue, mandatory);
55: }
56:
57: public int parse(String value) throws CommandLineException {
58: int result = 1;
59:
60: setValue(value);
61:
62: if (value != null) {
63: result++;
64: }
65:
66: return result;
67: }
68:
69: public void accept(Visitor visitor) {
70: visitor.visitOptionalValueSwitch(this);
71: }
72: }
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