1 /*
2 * Licensed under the Apache License, Version 2.0 (the "License");
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://www.apache.org/licenses/LICENSE-2.0
7 *
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
13 */
14
15 package org.basepom.mojo.propertyhelper;
16
17 import java.security.SecureRandom;
18 import java.util.Random;
19
20 import com.google.common.base.Strings;
21
22 public final class RandomUtil {
23
24 private RandomUtil() {
25 throw new AssertionError("RandomUtil can not be instantiated");
26 }
27
28 public static Random createRandomFromSeed(String seedValue) {
29 String seedString = Strings.nullToEmpty(seedValue);
30
31 if (!seedString.isEmpty()) {
32 long value = 0L;
33 for (char c : seedString.toCharArray()) {
34 value ^= c;
35 value <<= 4L;
36 }
37 return new Random(value);
38 } else {
39 return new SecureRandom();
40 }
41 }
42 }