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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  }