nlpsolver/ThirdParty/EvolutionarySolver/src/net/adaptivebox/global/BasicBound.java

   1 /**
   2  * Description: provide a bound, and the corresponding operations
   3  *
   4  * Author          Create/Modi     Note
   5  * Xiaofeng Xie    Oct. 9, 2002
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * Please acknowledge the author(s) if you use this code in any way.
  18  */
  19
  20 package net.adaptivebox.global;
  21
  22 public class BasicBound {
  23   public static final double MINDOUBLE = -1e308;
  24   public static final double MAXDOUBLE = 1e308;
  25
  26   public double minValue = MINDOUBLE;
  27   public double maxValue = MAXDOUBLE;
  28
  29   public BasicBound() {
  30   }
  31
  32   public BasicBound(double min, double max) {
  33     minValue = Math.min(min, max);
  34     maxValue = Math.max(min, max);
  35   }
  36
  37   public double getLength() {
  38     return Math.abs(maxValue - minValue);
  39   }
  40
  41   public double boundAdjust(double value) {
  42     if (value > maxValue) {
  43       value = maxValue;
  44     } else if (value < minValue) {
  45       value = minValue;
  46     }
  47     return value;
  48   }
  49
  50   public double annulusAdjust(double value) {
  51     if (value > maxValue) {
  52       double extendsLen = (value - maxValue) % getLength();
  53       value = minValue + extendsLen;
  54     } else if (value < minValue) {
  55       double extendsLen = (minValue - value) % getLength();
  56       value = maxValue - extendsLen;
  57     }
  58     return value;
  59   }
  60
  61   public double getRandomValue() {
  62     return RandomGenerator.doubleRangeRandom(minValue, maxValue);
  63   }
  64 }