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 *** * * */