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package cz.crcs.ectester.common.util;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
/**
* @author Jan Jancar johny@neuromancer.sk
*/
public class Util {
public static long convertTime(long nanos, String timeUnit) {
switch (timeUnit) {
default:
case "nano":
return nanos;
case "micro":
return nanos / 1000;
case "milli":
return nanos / 1000000;
}
}
public static int getVersion() {
String version = System.getProperty("java.version");
if (version.startsWith("1.")) {
version = version.substring(2, 3);
} else {
int dot = version.indexOf(".");
if (dot != -1) {
version = version.substring(0, dot);
}
}
return Integer.parseInt(version);
}
public static SecureRandom getRandom(byte[] seed) {
SecureRandom random;
try {
random = SecureRandom.getInstance("SHA1PRNG");
} catch (NoSuchAlgorithmException ignored) {
return null;
}
random.setSeed(seed);
return random;
}
}
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