ec.app.lawnmower

Class Lawnmower

java.lang.Object

ec.Problem

ec.gp.GPProblem

ec.app.lawnmower.Lawnmower

All Implemented Interfaces:

Prototype, Setup, SimpleProblemForm, Serializable, Cloneable

public class Lawnmower
extends GPProblem
implements SimpleProblemForm

Lawnmower implements the Koza-II Lawnmower problem.

Parameters

base.data classname, inherits or == ec.app.lawnmower.LawnmowerData	(the class for the prototypical GPData object for the Lawnmower problem)
base.file String	(filename of the .trl file for the Lawnmower problem)
base.turns int >= 1	(maximal number of moves the lawnmower may make)

Parameter bases

base.data

species (the GPData object)

Version:

1.0

Author:

Sean Luke

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
int[][]	map
int	maxx
int	maxy
int	moves
static int	O_DOWN
static int	O_LEFT
static int	O_RIGHT
static int	O_UP
int	orientation
static String	P_X
static String	P_Y
int	pmod
int	posx
int	posy
private static long	serialVersionUID
int	sum
static int	UNMOWED

Fields inherited from class ec.gp.GPProblem

input, P_DATA, P_GPPROBLEM, P_STACK, stack

Fields inherited from class ec.Problem

P_PROBLEM

Constructor Summary

Constructors

Constructor and Description
Lawnmower()

Method Summary

Methods

Modifier and Type	Method and Description
Object	clone() Creates a new individual cloned from a prototype, and suitable to begin use in its own evolutionary context.
void	describe(EvolutionState state, Individual ind, int subpopulation, int threadnum, int log) Part of SimpleProblemForm.
void	evaluate(EvolutionState state, Individual ind, int subpopulation, int threadnum) Evaluates the individual in ind, if necessary (perhaps not evaluating them if their evaluated flags are true), and sets their fitness appropriately.
void	setup(EvolutionState state, Parameter base) Sets up the object by reading it from the parameters stored in state, built off of the parameter base base.

Methods inherited from class ec.gp.GPProblem

defaultBase

Methods inherited from class ec.Problem

canEvaluate, closeContacts, describe, finishEvaluating, initializeContacts, prepareToEvaluate, reinitializeContacts

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

P_X

public static final String P_X

See Also:

Constant Field Values

P_Y

public static final String P_Y

See Also:

Constant Field Values

UNMOWED

public static final int UNMOWED

See Also:

Constant Field Values

O_UP

public static final int O_UP

See Also:

Constant Field Values

O_LEFT

public static final int O_LEFT

See Also:

Constant Field Values

O_DOWN

public static final int O_DOWN

See Also:

Constant Field Values

O_RIGHT

public static final int O_RIGHT

See Also:

Constant Field Values

map

public int[][] map

maxx

public int maxx

maxy

public int maxy

posx

public int posx

posy

public int posy

sum

public int sum

orientation

public int orientation

moves

public int moves

pmod

public int pmod

Constructor Detail

Lawnmower

public Lawnmower()

Method Detail

clone

public Object clone()

Description copied from interface: Prototype

Creates a new individual cloned from a prototype, and suitable to begin use in its own evolutionary context.

Typically this should be a full "deep" clone. However, you may share certain elements with other objects rather than clone hem, depending on the situation:

• If you hold objects which are shared with other instances, don't clone them.
• If you hold objects which must be unique, clone them.
• If you hold objects which were given to you as a gesture of kindness, and aren't owned by you, you probably shouldn't clone them.
• DON'T attempt to clone: Singletons, Cliques, or Groups.
• Arrays are not cloned automatically; you may need to clone an array if you're not sharing it with other instances. Arrays have the nice feature of being copyable by calling clone() on them.

Implementations.

• If no ancestor of yours implements clone(), and you have no need to do clone deeply, and you are abstract, then you should not declare clone().
• If no ancestor of yours implements clone(), and you have no need to do clone deeply, and you are not abstract, then you should implement it as follows:

   public Object clone() 
       {
       try
           { 
           return super.clone();
           }
       catch ((CloneNotSupportedException e)
           { throw new InternalError(); } // never happens
       }
          

• If no ancestor of yours implements clone(), but you need to deep-clone some things, then you should implement it as follows:

   public Object clone() 
       {
       try
           { 
           MyObject myobj = (MyObject) (super.clone());
  
           // put your deep-cloning code here...
           }
       catch ((CloneNotSupportedException e)
           { throw new InternalError(); } // never happens
       return myobj;
       } 
          

• If an ancestor has implemented clone(), and you also need to deep clone some things, then you should implement it as follows:

   public Object clone() 
       { 
       MyObject myobj = (MyObject) (super.clone());
  
       // put your deep-cloning code here...
  
       return myobj;
       } 
          

Specified by:

clone in interface Prototype

Overrides:

clone in class GPProblem

setup

public void setup(EvolutionState state,
         Parameter base)

Description copied from interface: Prototype

Sets up the object by reading it from the parameters stored in state, built off of the parameter base base. If an ancestor implements this method, be sure to call super.setup(state,base); before you do anything else.

For prototypes, setup(...) is typically called once for the prototype instance; cloned instances do not receive the setup(...) call. setup(...) may be called more than once; the only guarantee is that it will get called at least once on an instance or some "parent" object from which it was ultimately cloned.

Specified by:

setup in interface Prototype

Specified by:

setup in interface Setup

Overrides:

setup in class GPProblem

evaluate

public void evaluate(EvolutionState state,
            Individual ind,
            int subpopulation,
            int threadnum)

Description copied from interface: SimpleProblemForm

Evaluates the individual in ind, if necessary (perhaps not evaluating them if their evaluated flags are true), and sets their fitness appropriately.

Specified by:

evaluate in interface SimpleProblemForm

describe

public void describe(EvolutionState state,
            Individual ind,
            int subpopulation,
            int threadnum,
            int log)

Description copied from class: Problem

Part of SimpleProblemForm. Included here so you don't have to write the default version, which usually does nothing.

Specified by:

describe in interface SimpleProblemForm

Overrides:

describe in class Problem