?? rand.java
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package nl.justobjects.pushlet.util;import java.io.File;import java.io.FileOutputStream;import java.io.PrintWriter;import java.util.Random;/** * Randomizing routines. * * @author Just van den Broecke * @version $Id: Rand.java,v 1.3 2007/11/23 21:10:17 justb Exp $ */public class Rand { 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'}; private static char NON_VOWELS[] = {'b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'q', 'r', 's', 't', 'v', 'w', 'z'}; private static char VOWELS[] = {'a', 'e', 'i', 'o', 'u', 'y'}; private static Random random = new Random(); public static char randomChar() { return CHARS[randomInt(0, CHARS.length - 1)]; } public static char randomVowel() { return VOWELS[randomInt(0, VOWELS.length - 1)]; } public static char randomNonVowel() { return NON_VOWELS[randomInt(0, NON_VOWELS.length - 1)]; } public static File randomTempDir() throws Exception { File file = new File(System.getProperty("java.io.tmpdir") + File.separator + "oasetest" + File.separator + randomString(12)); file.mkdirs(); file.deleteOnExit(); return file; } public static File randomTempFile() throws Exception { File file = new File(System.getProperty("java.io.tmpdir") + File.separator + "oase-" + randomString(6)); file.createNewFile(); file.deleteOnExit(); return file; } public static File randomBinaryFile(int aSize) throws Exception { File file = randomTempFile(); FileOutputStream fos = new FileOutputStream(file); fos.write(randomBytes(aSize)); fos.close(); return file; } public static File randomTextFile(int aSize) throws Exception { File file = randomTempFile(); PrintWriter pw = new PrintWriter(new FileOutputStream(file)); pw.write(randomString(aSize)); pw.close(); return file; } public static byte[] randomBytes(int aSize) { return randomBlob(aSize); } public static byte[] randomBlob(int aSize) { byte[] retval = new byte[aSize]; for (int i = 0; i < retval.length; i++) { retval[i] = randomByte(); } return retval; } public static byte randomByte() { return (byte) random.nextInt(); } public static double randomDouble() { return random.nextLong(); } public static int randomInt() { return random.nextInt(); } public static int randomInt(int min, int max) { return (int) ((Math.random() * (double) (max + 1 - min)) + min); } public static long randomLong() { return random.nextLong(); } public static long randomLong(long min, long max) { return (long) ((Math.random() * (double) (max + 1L - min)) + min); } public static String randomName(int aLength) { StringBuffer sb = new StringBuffer(aLength); for (int i = 0; i < aLength; i++) { sb.append(i % 2 == 0 ? randomNonVowel() : randomVowel()); } return sb.toString(); } public static void randomSleep(long min, long max) { try { Thread.sleep(randomLong(min, max)); } catch (InterruptedException ie) { } } public static String randomString(int aLength) { StringBuffer sb = new StringBuffer(aLength); for (int i = 0; i < aLength; i++) { sb.append(randomChar()); } return sb.toString(); } public static String randomString() { return "" + randomLong(); }}/* * $Log: Rand.java,v $ * Revision 1.3 2007/11/23 21:10:17 justb * add hooks for custom logging (you can override DefaultLogger in pushlet.properties) * * Revision 1.2 2004/09/03 22:35:38 justb * Almost complete rewrite, just checking in now * * Revision 1.1 2004/03/10 12:21:27 justb * *** empty log message *** * * */
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