blob: fbe3cde7389039209acbd7799c7807a4e8543b5e (
plain) (
blame)
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
|
/*******************************************************************************
* Copyright (c) 2007 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.utility.internal;
import java.io.Serializable;
/**
* This class can be used wherever a mutable integer object is needed.
* It is a cross between an int and an Integer. It can be stored in a standard
* container (e.g. Collection) but can be modified.
*/
public final class Counter
implements Cloneable, Serializable
{
private int count = 0;
private static final long serialVersionUID = 1L;
/**
* Construct a counter with the specified initial value.
*/
public Counter(int count) {
super();
this.count = count;
}
/**
* Construct a counter with an initial value of zero.
*/
public Counter() {
this(0);
}
/**
* Return the current count of the counter.
*/
public synchronized int count() {
return this.count;
}
/**
* Increment and return the current count of the counter.
*/
public synchronized int increment() {
return ++this.count;
}
/**
* Increment and return the current count of the counter.
*/
public synchronized int increment(int increment) {
return this.count += increment;
}
/**
* Derement and return the current count of the counter.
*/
public synchronized int decrement() {
return --this.count;
}
/**
* Derement and return the current count of the counter.
*/
public synchronized int decrement(int decrement) {
return this.count -= decrement;
}
@Override
public synchronized boolean equals(Object o) {
if ( ! (o instanceof Counter)) {
return false;
}
return this.count == ((Counter) o).count;
}
@Override
public synchronized int hashCode() {
return this.count;
}
@Override
public synchronized Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException ex) {
throw new InternalError();
}
}
@Override
public synchronized String toString() {
StringBuffer sb = new StringBuffer();
sb.append(ClassTools.shortClassNameForObject(this));
sb.append('(');
sb.append(this.count);
sb.append(')');
return sb.toString();
}
}
|
