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1 package nl.justobjects.pushlet.util;
2
3 import java.io.File  ;
4 import java.io.FileOutputStream ;
5 import java.io.PrintWriter ;
6 import java.util.Random ;
7
8
14 public class Rand {
15 private static char CHARS[] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'r', 's', 't', 'u', 'v', 'w', 'y', 'z'};
16 private static char NON_VOWELS[] = {'b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'q', 'r', 's', 't', 'v', 'w', 'z'};
17 private static char VOWELS[] = {'a', 'e', 'i', 'o', 'u', 'y'};
18 private static Random random = new Random ();
19
20 public static char randomChar() {
21 return CHARS[randomInt(0, CHARS.length - 1)];
22 }
23
24 public static char randomVowel() {
25 return VOWELS[randomInt(0, VOWELS.length - 1)];
26 }
27
28 public static char randomNonVowel() {
29 return NON_VOWELS[randomInt(0, NON_VOWELS.length - 1)];
30 }
31
32 public static File randomTempDir() throws Exception {
33 File file = new File (System.getProperty("java.io.tmpdir") + File.separator + "oasetest" + File.separator + randomString(12));
34 file.mkdirs();
35 file.deleteOnExit();
36 return file;
37 }
38
39 public static File randomTempFile() throws Exception {
40 File file = new File (System.getProperty("java.io.tmpdir") + File.separator + "oase-" + randomString(6));
41 file.createNewFile();
42 file.deleteOnExit();
43 return file;
44 }
45
46 public static File randomBinaryFile(int aSize) throws Exception {
47 File file = randomTempFile();
48 FileOutputStream fos = new FileOutputStream (file);
49 fos.write(randomBytes(aSize));
50 fos.close();
51 return file;
52 }
53
54 public static File randomTextFile(int aSize) throws Exception {
55 File file = randomTempFile();
56 PrintWriter pw = new PrintWriter (new FileOutputStream (file));
57 pw.write(randomString(aSize));
58 pw.close();
59 return file;
60 }
61
62 public static byte[] randomBytes(int aSize) {
63 return randomBlob(aSize);
64 }
65
66 public static byte[] randomBlob(int aSize) {
67 byte[] retval = new byte[aSize];
68 for (int i = 0; i < retval.length; i++) {
69 retval[i] = randomByte();
70 }
71 return retval;
72 }
73
74 public static byte randomByte() {
75 return (byte) random.nextInt();
76 }
77
78 public static double randomDouble() {
79 return random.nextLong();
80 }
81
82
83 public static int randomInt() {
84 return random.nextInt();
85 }
86
87 public static int randomInt(int min, int max) {
88 return (int) ((Math.random() * (double) (max + 1 - min)) + min);
89 }
90
91 public static long randomLong() {
92 return random.nextLong();
93 }
94
95 public static long randomLong(long min, long max) {
96 return (long) ((Math.random() * (double) (max + 1L - min)) + min);
97 }
98
99 public static String randomName(int aLength) {
100 StringBuffer sb = new StringBuffer (aLength);
101 for (int i = 0; i < aLength; i++) {
102 sb.append(i % 2 == 0 ? randomNonVowel() : randomVowel());
103 }
104 return sb.toString();
105 }
106
107 public static void randomSleep(long min, long max) {
108 try {
109 Thread.sleep(randomLong(min, max));
110 } catch (InterruptedException ie) {
111
112 }
113 }
114
115 public static String randomString(int aLength) {
116 StringBuffer sb = new StringBuffer (aLength);
117 for (int i = 0; i < aLength; i++) {
118 sb.append(randomChar());
119 }
120 return sb.toString();
121 }
122
123 public static String randomString() {
124 return "" + randomLong();
125 }
126
127
128 }
129
130 |
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