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 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
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 *      http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.commons.math3.optim;

import org.apache.commons.math3.util.Incrementor;

Common settings for all optimization problems. Includes divergence and convergence
criteria.
Type parameters:
<PAIR> – The type of value the convergence
              checker will operate on. It should include the value of the model function and point where it was evaluated.
Since:
3.3/**
 * Common settings for all optimization problems. Includes divergence and convergence
 * criteria.
 *
 * @param <PAIR> The type of value the {@link #getConvergenceChecker() convergence
 *               checker} will operate on. It should include the value of the model
 *               function and point where it was evaluated.
 * @since 3.3
 */
public interface OptimizationProblem<PAIR> {
    
Get a independent Incrementor that counts up to the maximum number of evaluations
and then throws an exception.
Returns:
a counter for the evaluations./**
     * Get a independent Incrementor that counts up to the maximum number of evaluations
     * and then throws an exception.
     *
     * @return a counter for the evaluations.
     */
    Incrementor getEvaluationCounter();

    
Get a independent Incrementor that counts up to the maximum number of iterations
and then throws an exception.
Returns:
a counter for the evaluations./**
     * Get a independent Incrementor that counts up to the maximum number of iterations
     * and then throws an exception.
     *
     * @return a counter for the evaluations.
     */
    Incrementor getIterationCounter();

    
Gets the convergence checker.
Returns:
the object used to check for convergence./**
     * Gets the convergence checker.
     *
     * @return the object used to check for convergence.
     */
    ConvergenceChecker<PAIR> getConvergenceChecker();
}