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1
5 package org.h2.test.bench;
6
7 import java.math.BigDecimal  ;
8 import java.math.BigInteger ;
9 import java.util.Random ;
10
11 public class BenchCRandom {
12
13 private Random random = new Random (10);
14
15 int getNonUniform(int a, int min, int max) {
16 int c = 0;
17 return (((getInt(0, a) | getInt(min, max)) + c) % (max - min + 1))
18 + min;
19 }
20
21 int getInt(int min, int max) {
22 return max <= min ? min : (random.nextInt(max - min) + min);
23 }
24
25 boolean[] getBoolean(int length, int trueCount) {
26 boolean[] data = new boolean[length];
27 for (int i = 0, pos; i < trueCount; i++) {
28 do {
29 pos = getInt(0, length);
30 } while (data[pos]);
31 data[pos] = true;
32 }
33 return data;
34 }
35
36 String replace(String text, String replacement) {
37 int pos = getInt(0, text.length() - replacement.length());
38 StringBuffer buffer = new StringBuffer (text);
39 buffer.replace(pos, pos + 7, replacement);
40 return buffer.toString();
41 }
42
43 String getNumberString(int min, int max) {
44 int len = getInt(min, max);
45 char[] buff = new char[len];
46 for (int i = 0; i < len; i++) {
47 buff[i] = (char) getInt('0', '9');
48 }
49 return new String (buff);
50 }
51
52 String [] getAddress() {
53 String str1 = getString(10, 20);
54 String str2 = getString(10, 20);
55 String city = getString(10, 20);
56 String state = getString(2);
57 String zip = getNumberString(9, 9);
58 return new String [] { str1, str2, city, state, zip };
59 }
60
61 String getString(int min, int max) {
62 return getString(getInt(min, max));
63 }
64
65 String getString(int len) {
66 char[] buff = new char[len];
67 for (int i = 0; i < len; i++) {
68 buff[i] = (char) getInt('A', 'Z');
69 }
70 return new String (buff);
71 }
72
73 int[] getPermutation(int length) {
74 int[] data = new int[length];
75 for (int i = 0; i < length; i++) {
76 data[i] = i;
77 }
78 for (int i = 0; i < length; i++) {
79 int j = getInt(0, length);
80 int temp = data[i];
81 data[i] = data[j];
82 data[j] = temp;
83 }
84 return data;
85 }
86
87
88 BigDecimal getBigDecimal(int value, int scale) {
89 return new BigDecimal (new BigInteger (String.valueOf(value)), scale);
90 }
91
92 String getLastname(int i) {
93 String [] n = { "BAR", "OUGHT", "ABLE", "PRI", "PRES", "ESE", "ANTI",
94 "CALLY", "ATION", "EING" };
95 StringBuffer buff = new StringBuffer ();
96 buff.append(n[i / 100]);
97 buff.append(n[(i / 10) % 10]);
98 buff.append(n[i % 10]);
99 return buff.toString();
100 }
101
102 }
103 |
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