Package org.moeaframework.problem

Class ProblemWrapper

java.lang.Object
org.moeaframework.problem.ProblemWrapper
All Implemented Interfaces:
AutoCloseable, Problem
Direct Known Subclasses:
DistributedProblem, RotatedProblem, ScaledProblem, ScriptedProblem, TimingProblem
public abstract class ProblemWrapper extends Object implements Problem
Wraps a problem instance to modify or extend its functionality.

All methods invoke the corresponding method on the inner problem. Subclasses need only override the methods they need to change.

  • Field Details

    • problem

      protected final Problem problem
      The original problem instance.

  • Constructor Details

    • ProblemWrapper

      protected ProblemWrapper(Problem problem)
      Constructs a new problem wrapper to modify or extend the functionality of the given problem.
      Parameters:
      problem - the problem being modified or extended

  • Method Details

    • getName

      public String getName()
      Description copied from interface: Problem
      Returns the user-friendly name for this problem.
      Specified by:
      getName in interface Problem
      Returns:
      the user-friendly name for this problem

    • getNumberOfVariables

      public int getNumberOfVariables()
      Description copied from interface: Problem
      Returns the number of decision variables defined by this problem.
      Specified by:
      getNumberOfVariables in interface Problem
      Returns:
      the number of decision variables defined by this problem

    • getNumberOfObjectives

      public int getNumberOfObjectives()
      Description copied from interface: Problem
      Returns the number of objectives defined by this problem.
      Specified by:
      getNumberOfObjectives in interface Problem
      Returns:
      the number of objectives defined by this problem

    • getNumberOfConstraints

      public int getNumberOfConstraints()
      Description copied from interface: Problem
      Returns the number of constraints defined by this problem.
      Specified by:
      getNumberOfConstraints in interface Problem
      Returns:
      the number of constraints defined by this problem

    • evaluate

      public void evaluate(Solution solution)
      Description copied from interface: Problem
      Evaluates the solution, updating the solution's objectives in place. Algorithms must explicitly call this method when appropriate to evaluate new solutions or reevaluate modified solutions.
      Specified by:
      evaluate in interface Problem
      Parameters:
      solution - the solution to be evaluated

    • newSolution

      public Solution newSolution()
      Description copied from interface: Problem
      Returns a new solution for this problem. Implementations must initialize the variables so that the valid range of values is defined, but typically leave the actual value at a default or undefined state.
      Specified by:
      newSolution in interface Problem
      Returns:
      a new solution for this problem

    • close

      public void close()
      Description copied from interface: Problem
      Closes any underlying resources used by this problem. Once closed, further invocations of any methods on this problem may throw exceptions.
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Problem