nlpsolver/ThirdParty/EvolutionarySolver/src/net/adaptivebox/knowledge/SearchPoint.java

   1 /**
   2  * Description: provide the location and encoded goodness information
   3  *
   4  * Author          Create/Modi     Note
   5  * Xiaofeng Xie    Mar 1, 2003
   6  * Xiaofeng Xie    May 11, 2004
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * Please acknowledge the author(s) if you use this code in any way.
  19  */
  20 package net.adaptivebox.knowledge;
  21
  22 import net.adaptivebox.encode.IEncodeEngine;
  23 import net.adaptivebox.global.BasicBound;
  24 import net.adaptivebox.space.BasicPoint;
  25
  26 public class SearchPoint extends BasicPoint implements IEncodeEngine {
  27   // store the encode information for goodness evaluation
  28   // encodeInfo[0]: the sum of constraints (if it equals to 0, then be a feasible point)
  29   // encodeInfo[1]: the value of objective function
  30   private final double[] encodeInfo = new double[2];
  31   private double objectiveValue;
  32
  33   public SearchPoint(int dim) {
  34     super(dim);
  35     for (int i = 0; i < encodeInfo.length; i++) {
  36       encodeInfo[i] = BasicBound.MAXDOUBLE;
  37     }
  38   }
  39
  40   public double[] getEncodeInfo() {
  41     return encodeInfo;
  42   }
  43
  44   private void importEncodeInfo(double[] info) {
  45     System.arraycopy(info, 0, encodeInfo, 0, encodeInfo.length);
  46   }
  47
  48   private void importEncodeInfo(IEncodeEngine point) {
  49     importEncodeInfo(point.getEncodeInfo());
  50   }
  51
  52   // Replace self by given point
  53   public void importPoint(SearchPoint point) {
  54     importLocation(point);
  55     importEncodeInfo(point);
  56     setObjectiveValue(point.getObjectiveValue());
  57   }
  58
  59   public double getObjectiveValue() {
  60     return objectiveValue;
  61   }
  62
  63   public void setObjectiveValue(double objectiveValue) {
  64     this.objectiveValue = objectiveValue;
  65   }
  66
  67   public boolean isFeasible() {
  68     return encodeInfo[0] == 0; // no constraint violations
  69   }
  70 }