greedyswapsearcher.java

pso源程序

/**
 * Description: The description of 2-change mutation strategy.
 *
 * @ Author        Create/Modi     Note
 * Xiaofeng Xie    Jun 19, 2006
 *
 * @version 1.0
 *
 */

package maosKernel.behavior.greedy;

import Global.basic.attrib.*;
import Global.basic.data.collection.*;

import maosKernel.represent.space.*;
import maosKernel.behavior.mutate.*;
import maosKernel.behavior.channel.*;
import Global.basic.nodes.utilities.*;

public class GreedySwapSearcher extends AbsMaskedExplicitMutator {
  private ISystematicChangeEngine greedySwaper;
  private ILocalChangeEngine getSwapICostEngine;

  public String getSpecialSummary() {
    String sumInfo = "";
    if (greedySwaper instanceof ISummaryEngine) {
      sumInfo += ((ISummaryEngine)greedySwaper).getSummary();
    }
    if (getSwapICostEngine instanceof ISummaryEngine) {
      sumInfo += ((ISummaryEngine)getSwapICostEngine).getSummary();
    }
    return sumInfo;
  }

  public void initUtilities() {
    super.initUtilities();
    initUtility(new BasicUtility("LocalChangeEigine", getSwapICostEngine));
    initUtility(new BasicUtility("SystematicChangeEngine", greedySwaper));
  }

  public void shortcutInit() throws Exception {
    super.shortcutInit();
    getSwapICostEngine = (ILocalChangeEngine)(getValue("LocalChangeEigine"));
    greedySwaper = (ISystematicChangeEngine)getValue("SystematicChangeEngine");
  }

  public void initGreedySwaper(ISystematicChangeEngine greedySwaper, ILocalChangeEngine getSwapICostEngine) {
    this.greedySwaper = greedySwaper;
    this.getSwapICostEngine = getSwapICostEngine;
  }

  public void setMaskFlags(IAlienICollectionEngine maskFlags) {
    super.maskFlags = maskFlags;
    if (greedySwaper instanceof ISetMaskFlagsEngine) {
      ( (ISetMaskFlagsEngine) greedySwaper).setMaskFlags(maskFlags);
    }
  }

  public void mutateBehavior(SearchState baseState) {
    greedySwaper.systematicSearch(baseState, getSwapICostEngine);
  }
}