org.opt4j.core.optimizer (opt4j-core 3.1.3 API)

Interface Summary
Interface	Description
ControlListener	The `ControlListener` is an interface of classes that listen to the `Control` state.
IndividualCompleter	An `IndividualCompleter` completes the evaluation process of `Individual`s.
IterativeOptimizer	This `IterativeOptimizer` interface has to be implemented by all population-based iterative optimizers.
Operator<G extends Genotype>	The `Operator` is the basic interface for all operators.
Optimizer	This `Optimizer` interface has to be implemented by all population-based optimizers.
OptimizerIterationListener	The `OptimizerIterationListener` is used to monitor the iteration of the `Optimizer`.
OptimizerStateListener	The `OptimizerStateListener` is used to monitor the state of the `Optimizer`.

Class Summary
Class	Description
AbstractOptimizer	The `AbstractOptimizer` is an abstract implementation of a population-based `Optimizer`.
Archive	An `Archive` is used to store a set of high-quality `Individual` s.
Control	The `Control` allows to pause, stop, and terminate, the optimization process.
Iteration	The `Iteration` object is used as iteration counter for the optimization.
OptimizationMediator	The `OptimizationMediator` performs the overall optimization process for the `IterativeOptimizer`.
OptimizerModule	Abstract module class for the `Optimizer` modules.
Population	The `Population` manages a set of `Individual`s.

Enum Summary
Enum Description

Control.State
The Control.State of the control.

Enum Summary
Enum	Description
Control.State	The `Control.State` of the control.

Exception Summary
Exception	Description
IncompatibilityException	The `IncompatibilityException`.
StopException	The `StopException` is thrown if the optimization is stopped.
TerminationException	The `TerminationException` is thrown if the optimization is terminated.

Annotation Types Summary
Annotation Type Description

MaxIterations
The MaxIterations is the default binding annotation for the maximal number of iterations for an Optimizer.

Annotation Types Summary
Annotation Type	Description
MaxIterations	The `MaxIterations` is the default binding annotation for the maximal number of iterations for an `Optimizer`.

Package org.opt4j.core.optimizer Description

Provides the classes for the optimizer.

The Optimizer represents an optimization algorithm. Usually, all iteration-based Optimizers are derived from the IterativeOptimizer.

The IterativeOptimizer initializes the Population by using the IndividualFactory to get new Individuals. In each iteration, the IterativeOptimizer uses Operators to vary the Genotypes. The package org.opt4j.operators contains predefined Operator classes which are applicable for different Genotypes.

The IterativeOptimizer is managed by the OptimizationMediator which itself is an AbstractOptimizer. The AbstractOptimizer implements some essential methods for coupling optimizers with the framework. It interacts with the OptimizerIterationListeners which are informed whenever an iteration is complete, the OptimizerStateListeners which are informed whenever the optimization starts or stops, and the Control: The Control allows to pause and resume, stop, or terminate the optimization process. While the Population contains the Individuals of the current Iteration, the Archive contains the non-dominated Individuals that were obtained throughout the whole optimization process. The AbstractOptimizer updates the Archive with the current Population and triggers the Iteration count. Instead of using the Decoder and Evaluator directly, the IndividualCompleter is used by Optimizers to determine the phenotype and the Objectives of new Individuals in the Population.