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net.sf.infrared.agent.util.MutableInteger |
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1 | /* |
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2 | * Copyright 2005 Tavant Technologies and Contributors |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License") |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | * |
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16 | * |
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17 | * |
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18 | * Original Author: kamal.govindraj (Tavant Technologies) |
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19 | * Contributor(s): -; |
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20 | * |
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21 | */ |
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22 | package net.sf.infrared.agent.util; |
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23 | ||
24 | /** |
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25 | * Object wrapper for int which is mutable. Used in situations where an Object |
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26 | * is required (map key or value) and using the Integer would lead to |
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27 | * unnecessary creation of temporary objects |
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28 | * |
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29 | * @author kamal.govindraj |
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30 | */ |
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31 | public class MutableInteger { |
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32 | private int value; |
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33 | ||
34 | 0 | public MutableInteger() { |
35 | 0 | } |
36 | ||
37 | 5 | public MutableInteger(int value) { |
38 | 5 | this.value = value; |
39 | 5 | } |
40 | ||
41 | 0 | public MutableInteger(Integer value) { |
42 | 0 | this.value = value.intValue(); |
43 | 0 | } |
44 | ||
45 | public int class="keyword">intValue() { |
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46 | 0 | return value; |
47 | } |
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48 | ||
49 | public MutableInteger add(int addend) { |
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50 | 0 | value += addend; |
51 | 0 | return this; |
52 | } |
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53 | ||
54 | public MutableInteger subtract(int subtractant) { |
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55 | 0 | value -= subtractant; |
56 | 0 | return this; |
57 | } |
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58 | ||
59 | public MutableInteger increment() { |
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60 | 9 | value++; |
61 | 9 | return this; |
62 | } |
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63 | ||
64 | public MutableInteger decrement() { |
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65 | 9 | value--; |
66 | 9 | return this; |
67 | } |
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68 | ||
69 | public boolean isZero() { |
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70 | 18 | return value == 0; |
71 | } |
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72 | ||
73 | public boolean isPositive() { |
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74 | 0 | return value >= 0; |
75 | } |
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76 | ||
77 | public boolean isNegative() { |
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78 | 0 | return value < 0; |
79 | } |
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80 | ||
81 | public boolean isEqual(int value) { |
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82 | 0 | return this.value == value; |
83 | } |
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84 | ||
85 | /** |
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86 | * @see java.lang.Object#equals(Object) |
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87 | */ |
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88 | public boolean equals(Object object) { |
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89 | 0 | if (!(object instanceof MutableInteger)) { |
90 | 0 | return false; |
91 | } |
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92 | 0 | MutableInteger rhs = (MutableInteger) object; |
93 | 0 | return this.value == rhs.value; |
94 | } |
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95 | ||
96 | /** |
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97 | * @see java.lang.Object#hashCode() |
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98 | */ |
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99 | public int hashCode() { |
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100 | 0 | return this.value; |
101 | } |
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102 | ||
103 | /* |
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104 | * (non-Javadoc) |
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105 | * |
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106 | * @see java.lang.Object#toString() |
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107 | */ |
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108 | public String toString() { |
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109 | 0 | return Integer.toString(value); |
110 | } |
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111 | ||
112 | } |
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