001/*
002 * Licensed under the Apache License, Version 2.0 (the "License");
003 * you may not use this file except in compliance with the License.
004 * You may obtain a copy of the License at
005 *
006 * http://www.apache.org/licenses/LICENSE-2.0
007 *
008 * Unless required by applicable law or agreed to in writing, software
009 * distributed under the License is distributed on an "AS IS" BASIS,
010 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
011 * See the License for the specific language governing permissions and
012 * limitations under the License.
013 */
014
015package org.basepom.mojo.propertyhelper;
016
017import java.security.SecureRandom;
018import java.util.Random;
019
020import com.google.common.base.Strings;
021
022public final class RandomUtil {
023
024    private RandomUtil() {
025        throw new AssertionError("RandomUtil can not be instantiated");
026    }
027
028    public static Random createRandomFromSeed(String seedValue) {
029        String seedString = Strings.nullToEmpty(seedValue);
030
031        if (!seedString.isEmpty()) {
032            long value = 0L;
033            for (char c : seedString.toCharArray()) {
034                value ^= c;
035                value <<= 4L;
036            }
037            return new Random(value);
038        } else {
039            return new SecureRandom();
040        }
041    }
042}