Examples
Class ExampleHyperHeuristic3

java.lang.Object
  AbstractClasses.HyperHeuristic
      Examples.ExampleHyperHeuristic3

public class ExampleHyperHeuristic3
extends HyperHeuristic

This class presents an example hyper-heuristic which demonstrates how to use the different types of low level heuristic in each Problem Domain. it is intended to be read after the ExampleHyperHeuristic2 class has been understood. There are four types of low level heuristic within each domain of the competition software:
1) Local Search
2) Mutation
3) Ruin-Recreate
4) Crossover

the methods to retrieve the indices of the heuristics of each type are given in the example below. if there are no heuristics of a certain type, then the method returns null. Using the information about the type of the heuristic is potentially powerful, but it is important to check that the problem domain contains heuristics of that type, by checking for equality with null. Examples of such checks can be seen in this class.

to apply a crossover heuristic, a different method must be used, which supplies two input solutions instead of one. it is possible to supply the index of a crossover heuristic to the method which applies a non-crossover heuristic. if this happens, the method will return the input solution unmodified. Therefore, the hyper-heuristic strategy implemented in ExampleHyperHeuristic1.java occasionally chooses a crossover heuristic which does nothing, as it is applied with only one input solution.

Field Summary

Fields inherited from class AbstractClasses.HyperHeuristic

rng

Constructor Summary

ExampleHyperHeuristic3(long seed)
creates a new ExampleHyperHeuristic object with a random seed

Method Summary

void	solve(ProblemDomain problem) This method defines the strategy of the hyper-heuristic
java.lang.String	toString() this method must be implemented, to provide a different name for each hyper-heuristic

Methods inherited from class AbstractClasses.HyperHeuristic

getBestSolutionValue, getElapsedTime, getFitnessTrace, getTimeLimit, hasTimeExpired, loadProblemDomain, run, setTimeLimit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ExampleHyperHeuristic3

public ExampleHyperHeuristic3(long seed)

creates a new ExampleHyperHeuristic object with a random seed

Method Detail

solve

public void solve(ProblemDomain problem)

This method defines the strategy of the hyper-heuristic

Specified by:

solve in class HyperHeuristic

Parameters:

problem - the problem domain to be solved

toString

public java.lang.String toString()

this method must be implemented, to provide a different name for each hyper-heuristic

Specified by:

toString in class HyperHeuristic

Returns:

a string representing the name of the hyper-heuristic