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1
16 package org.apache.commons.lang.math;
17
18 import java.io.Serializable  ;
19
20
29 public final class NumberRange extends Range implements Serializable {
30
31 private static final long serialVersionUID = 71849363892710L;
32
33
36 private final Number min;
37
40 private final Number max;
41
42
45 private transient int hashCode = 0;
46
49 private transient String toString = null;
50
51
60 public NumberRange(Number num) {
61 if (num == null) {
62 throw new IllegalArgumentException ("The number must not be null");
63 }
64 if (num instanceof Comparable == false) {
65 throw new IllegalArgumentException ("The number must implement Comparable");
66 }
67 if (num instanceof Double && ((Double ) num).isNaN()) {
68 throw new IllegalArgumentException ("The number must not be NaN");
69 }
70 if (num instanceof Float && ((Float ) num).isNaN()) {
71 throw new IllegalArgumentException ("The number must not be NaN");
72 }
73
74 this.min = num;
75 this.max = num;
76 }
77
78
96 public NumberRange(Number num1, Number num2) {
97 if (num1 == null || num2 == null) {
98 throw new IllegalArgumentException ("The numbers must not be null");
99 }
100 if (num1.getClass() != num2.getClass()) {
101 throw new IllegalArgumentException ("The numbers must be of the same type");
102 }
103 if (num1 instanceof Comparable == false) {
104 throw new IllegalArgumentException ("The numbers must implement Comparable");
105 }
106 if (num1 instanceof Double ) {
107 if (((Double ) num1).isNaN() || ((Double ) num2).isNaN()) {
108 throw new IllegalArgumentException ("The number must not be NaN");
109 }
110 } else if (num1 instanceof Float ) {
111 if (((Float ) num1).isNaN() || ((Float ) num2).isNaN()) {
112 throw new IllegalArgumentException ("The number must not be NaN");
113 }
114 }
115
116 int compare = ((Comparable ) num1).compareTo(num2);
117 if (compare == 0) {
118 this.min = num1;
119 this.max = num1;
120 } else if (compare > 0) {
121 this.min = num2;
122 this.max = num1;
123 } else {
124 this.min = num1;
125 this.max = num2;
126 }
127 }
128
129
132
137 public Number getMinimumNumber() {
138 return min;
139 }
140
141
146 public Number getMaximumNumber() {
147 return max;
148 }
149
150
153
163 public boolean containsNumber(Number number) {
164 if (number == null) {
165 return false;
166 }
167 if (number.getClass() != min.getClass()) {
168 throw new IllegalArgumentException ("The number must be of the same type as the range numbers");
169 }
170 int compareMin = ((Comparable ) min).compareTo(number);
171 int compareMax = ((Comparable ) max).compareTo(number);
172 return compareMin <= 0 && compareMax >= 0;
173 }
174
175
179
182
190 public boolean equals(Object obj) {
191 if (obj == this) {
192 return true;
193 }
194 if (obj instanceof NumberRange == false) {
195 return false;
196 }
197 NumberRange range = (NumberRange) obj;
198 return min.equals(range.min) && max.equals(range.max);
199 }
200
201
206 public int hashCode() {
207 if (hashCode == 0) {
208 hashCode = 17;
209 hashCode = 37 * hashCode + getClass().hashCode();
210 hashCode = 37 * hashCode + min.hashCode();
211 hashCode = 37 * hashCode + max.hashCode();
212 }
213 return hashCode;
214 }
215
216
223 public String toString() {
224 if (toString == null) {
225 StringBuffer buf = new StringBuffer (32);
226 buf.append("Range[");
227 buf.append(min);
228 buf.append(',');
229 buf.append(max);
230 buf.append(']');
231 toString = buf.toString();
232 }
233 return toString;
234 }
235
236 }
237 |
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