jmetal.core
Class Problem

java.lang.Object
  jmetal.core.Problem

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

Binh2, ConstrEx, DTLZ1, DTLZ2, DTLZ3, DTLZ4, DTLZ5, DTLZ6, DTLZ7, EBEs, Fonseca, FourBarTruss, Golinski, Griewank, IntRealProblem, Kursawe, LZ09_F1, LZ09_F2, LZ09_F3, LZ09_F4, LZ09_F5, LZ09_F6, LZ09_F7, LZ09_F8, LZ09_F9, mQAP, mTSP, OKA1, OKA2, OneMax, OneZeroMax, Osyczka2, Poloni, Rastrigin, Rosenbrock, Schaffer, Sphere, Srinivas, Tanaka, TSP, UF1, UF10, UF2, UF3, UF4, UF5, UF6, UF7, UF8, UF9, Viennet2, Viennet3, Viennet4, Water, WFG, ZDT1, ZDT2, ZDT3, ZDT4, ZDT5, ZDT6

public abstract class Problem
extends java.lang.Object
implements java.io.Serializable

Abstract class representing a multiobjective optimization problem

See Also:

Serialized Form

Field Summary

protected int[]	length_ Stores the length of each encodings.variable when applicable (e.g., Binary and Permutation variables)
protected double[]	lowerLimit_ Stores the lower bound values for each encodings.variable (only if needed)
protected int	numberOfConstraints_ Stores the number of constraints of the problem
protected int	numberOfObjectives_ Stores the number of objectives of the problem
protected int	numberOfVariables_ Stores the number of variables of the problem
protected java.lang.String	problemName_ Stores the problem name
protected SolutionType	solutionType_ Stores the type of the solutions of the problem
protected double[]	upperLimit_ Stores the upper bound values for each encodings.variable (only if needed)

Constructor Summary

Problem()
Constructor.

Problem(SolutionType solutionType)
Constructor.

Method Summary

abstract void	evaluate(Solution solution) Evaluates a Solution object.
void	evaluateConstraints(Solution solution) Evaluates the overall constraint violation of a Solution object.
int	getLength(int var) Returns the length of the encodings.variable.
double	getLowerLimit(int i) Gets the lower bound of the ith encodings.variable of the problem.
java.lang.String	getName() Returns the problem name
int	getNumberOfBits() Returns the number of bits of the solutions of the problem
int	getNumberOfConstraints() Gets the number of side constraints in the problem.
int	getNumberOfObjectives() Gets the the number of objectives of the problem.
int	getNumberOfVariables() Gets the number of decision variables of the problem.
int[]	getPrecision() Returns array containing the number of bits that must be used to encode binary-real variables.
int	getPrecision(int var) Returns the number of bits that must be used to encode binary-real variables
SolutionType	getSolutionType() Returns the type of the variables of the problem.
double	getUpperLimit(int i) Gets the upper bound of the ith encodings.variable of the problem.
void	setNumberOfVariables(int numberOfVariables) Sets the number of decision variables of the problem.
void	setPrecision(int[] precision) Sets the array containing the number of bits that must be used to encode binary-real variables.
void	setSolutionType(SolutionType type) Sets the type of the variables of the problem.

Methods inherited from class java.lang.Object

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

Field Detail

numberOfVariables_

protected int numberOfVariables_

Stores the number of variables of the problem

numberOfObjectives_

protected int numberOfObjectives_

Stores the number of objectives of the problem

numberOfConstraints_

protected int numberOfConstraints_

Stores the number of constraints of the problem

problemName_

protected java.lang.String problemName_

Stores the problem name

solutionType_

protected SolutionType solutionType_

Stores the type of the solutions of the problem

lowerLimit_

protected double[] lowerLimit_

Stores the lower bound values for each encodings.variable (only if needed)

upperLimit_

protected double[] upperLimit_

Stores the upper bound values for each encodings.variable (only if needed)

length_

protected int[] length_

Stores the length of each encodings.variable when applicable (e.g., Binary and Permutation variables)

Constructor Detail

Problem

public Problem()

Constructor.

Problem

public Problem(SolutionType solutionType)

Constructor.

Method Detail

getNumberOfVariables

public int getNumberOfVariables()

Gets the number of decision variables of the problem.

Returns:

the number of decision variables.

setNumberOfVariables

public void setNumberOfVariables(int numberOfVariables)

Sets the number of decision variables of the problem.

getNumberOfObjectives

public int getNumberOfObjectives()

Gets the the number of objectives of the problem.

Returns:

the number of objectives.

getLowerLimit

public double getLowerLimit(int i)

Gets the lower bound of the ith encodings.variable of the problem.

Parameters:

i - The index of the encodings.variable.

Returns:

The lower bound.

getUpperLimit

public double getUpperLimit(int i)

Gets the upper bound of the ith encodings.variable of the problem.

Parameters:

i - The index of the encodings.variable.

Returns:

The upper bound.

evaluate

public abstract void evaluate(Solution solution)
                       throws JMException

Evaluates a Solution object.

Parameters:

solution - The Solution to evaluate.

Throws:

JMException

getNumberOfConstraints

public int getNumberOfConstraints()

Gets the number of side constraints in the problem.

Returns:

the number of constraints.

evaluateConstraints

public void evaluateConstraints(Solution solution)
                         throws JMException

Evaluates the overall constraint violation of a Solution object.

Parameters:

solution - The Solution to evaluate.

Throws:

JMException

getPrecision

public int getPrecision(int var)

Returns the number of bits that must be used to encode binary-real variables

Returns:

the number of bits.

getPrecision

public int[] getPrecision()

Returns array containing the number of bits that must be used to encode binary-real variables.

Returns:

the number of bits.

setPrecision

public void setPrecision(int[] precision)

Sets the array containing the number of bits that must be used to encode binary-real variables.

Parameters:

precision - The array

getLength

public int getLength(int var)

Returns the length of the encodings.variable.

Returns:

the encodings.variable length.

setSolutionType

public void setSolutionType(SolutionType type)

Sets the type of the variables of the problem.

Parameters:

type - The type of the variables

getSolutionType

public SolutionType getSolutionType()

Returns the type of the variables of the problem.

Returns:

type of the variables of the problem.

getName

public java.lang.String getName()

Returns the problem name

Returns:

The problem name

getNumberOfBits

public int getNumberOfBits()

Returns the number of bits of the solutions of the problem

Returns:

The number of bits solutions of the problem