blob: 3c77a4d55d6f7985c488078a05cd8413e0991313 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
package de.lmu.ifi.dbs.elki.data;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.util.regex.Pattern;
/**
* Provides a bit number. The bit is internally represented as boolean.
*
* @author Arthur Zimek
*/
public class Bit extends Number {
/**
* Generated serial version UID.
*/
private static final long serialVersionUID = 390879869314931240L;
/**
* Pattern defining valid bit values. A valid bit value is either 0 or 1.
*/
public static final Pattern BIT_PATTERN = Pattern.compile("^[01]$");
/**
* Method to construct a Bit for a given String expression.
*
* @param bit a String expression defining a Bit
* @return a Bit as defined by the given String expression
* @throws NumberFormatException if the given String expression does not fit
* to the Pattern {@link #BIT_PATTERN BIT_PATTERN}
*/
public static Bit valueOf(String bit) throws NumberFormatException {
if(!BIT_PATTERN.matcher(bit).matches()) {
throw new NumberFormatException("Input \"" + bit + "\" does not fit required pattern: " + BIT_PATTERN.pattern());
}
return new Bit(Integer.parseInt(bit));
}
/**
* Internal representation of the bit value.
*/
private boolean bit;
/**
* Provides a new bit according to the specified boolean value.
*
* @param bit the boolean value of this bit
*/
public Bit(boolean bit) {
this.bit = bit;
}
/**
* Provides a new bit according to the specified integer value. The bit value
* is 1 for true and 0 for false.
*
* @param bit 1 for true and 0 for false
* @throws IllegalArgumentException if the specified value is neither 0 nor 1.
*/
public Bit(int bit) throws IllegalArgumentException {
if(bit != 0 && bit != 1) {
throw new IllegalArgumentException("Required: 0 or 1 - found: " + bit);
}
this.bit = bit == 1;
}
/**
* Provides an integer representation of the bit.
*
* @return 1 if the bit is set, 0 otherwise
*/
@Override
public int intValue() {
return bit ? 1 : 0;
}
/**
* Provides a long value for the integer representation of this Bit as given
* by {@link #intValue() intValue()}.
*/
@Override
public long longValue() {
return intValue();
}
/**
* Provides a float value for the integer representation of this Bit as given
* by {@link #intValue() intValue()}.
*/
@Override
public float floatValue() {
return intValue();
}
/**
* Provides a double value for the integer representation of this Bit as given
* by {@link #intValue() intValue()}.
*/
@Override
public double doubleValue() {
return intValue();
}
/**
* Returns the bit value as a boolean.
*
* @return the bit value
*/
public boolean bitValue() {
return this.bit;
}
/**
* Provides the String representation of the integer representation of this
* Bit as given by {@link #intValue() intValue()}.
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return Integer.toString(intValue());
}
}
|
