RandomSelectionPolicyHandler.java

package net.bmahe.genetics4j.core.selection;

import java.util.List;
import java.util.Objects;
import java.util.random.RandomGenerator;

import org.apache.commons.lang3.Validate;

import net.bmahe.genetics4j.core.Genotype;
import net.bmahe.genetics4j.core.Population;
import net.bmahe.genetics4j.core.spec.AbstractEAConfiguration;
import net.bmahe.genetics4j.core.spec.AbstractEAExecutionContext;
import net.bmahe.genetics4j.core.spec.selection.RandomSelection;
import net.bmahe.genetics4j.core.spec.selection.SelectionPolicy;

public class RandomSelectionPolicyHandler<T extends Comparable<T>> implements SelectionPolicyHandler<T> {

	private final RandomGenerator randomGenerator;

	public RandomSelectionPolicyHandler(final RandomGenerator _randomGenerator) {
		Objects.requireNonNull(_randomGenerator);

		this.randomGenerator = _randomGenerator;
	}

	@Override
	public boolean canHandle(final SelectionPolicy selectionPolicy) {
		Objects.requireNonNull(selectionPolicy);
		return selectionPolicy instanceof RandomSelection;
	}

	@Override
	public Selector<T> resolve(final AbstractEAExecutionContext<T> eaExecutionContext,
			final AbstractEAConfiguration<T> eaConfiguration,
			final SelectionPolicyHandlerResolver<T> selectionPolicyHandlerResolver,
			final SelectionPolicy selectionPolicy) {
		Objects.requireNonNull(selectionPolicy);
		Validate.isInstanceOf(RandomSelection.class, selectionPolicy);

		return new Selector<T>() {

			@Override
			public Population<T> select(final AbstractEAConfiguration<T> eaConfiguration, final long generation,
					final int numIndividuals, final List<Genotype> population, final List<T> fitnessScore) {
				Objects.requireNonNull(eaConfiguration);
				Objects.requireNonNull(population);
				Objects.requireNonNull(fitnessScore);
				Validate.isTrue(generation >= 0);
				Validate.isTrue(numIndividuals > 0);
				Validate.isTrue(population.size() > 0);
				Validate.isTrue(fitnessScore.size() > 0);
				Validate.isTrue(fitnessScore.size() == population.size());

				final Population<T> selected = new Population<>();

				for (int i = 0; i < numIndividuals; i++) {
					final int selectedIndex = randomGenerator.nextInt(population.size());
					selected.add(population.get(selectedIndex), fitnessScore.get(selectedIndex));
				}
				return selected;
			}
		};
	}
}










Active mutators

CONDITIONALS_BOUNDARY
CONSTRUCTOR_CALLS
EMPTY_RETURNS
EXPERIMENTAL_ARGUMENT_PROPAGATION
EXPERIMENTAL_BIG_DECIMAL
EXPERIMENTAL_BIG_INTEGER
EXPERIMENTAL_MEMBER_VARIABLE
EXPERIMENTAL_NAKED_RECEIVER
EXPERIMENTAL_REMOVE_SWITCH_MUTATOR_[0-99]
EXPERIMENTAL_SWITCH
FALSE_RETURNS
INCREMENTS
INLINE_CONSTS
INVERT_NEGS
MATH
NEGATE_CONDITIONALS
NON_VOID_METHOD_CALLS
NULL_RETURNS
PRIMITIVE_RETURNS
REMOVE_CONDITIONALS_EQUAL_ELSE
REMOVE_CONDITIONALS_EQUAL_IF
REMOVE_CONDITIONALS_ORDER_ELSE
REMOVE_CONDITIONALS_ORDER_IF
REMOVE_INCREMENTS
TRUE_RETURNS
VOID_METHOD_CALLS

Tests examined

net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] (11 ms)
net.bmahe.genetics4j.core.mutation.SupersimpleTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.mutation.SupersimpleTest]/[method:simple()] (4 ms)
net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:canHandleRequireSelection()] (0 ms)
net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:canHandle()] (0 ms)
net.bmahe.genetics4j.core.replacement.ElitismImplTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.replacement.ElitismImplTest]/[method:ctorNoSurvivorSelector()] (1 ms)
net.bmahe.genetics4j.core.replacement.ElitismImplTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.replacement.ElitismImplTest]/[method:ctorNoOffspringSelector()] (1 ms)
net.bmahe.genetics4j.core.replacement.ElitismImplTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.replacement.ElitismImplTest]/[method:ctorNoElitismSpec()] (1 ms)
net.bmahe.genetics4j.core.selection.TournamentSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.TournamentSelectionPolicyHandlerTest]/[method:selectMaximize()] (2 ms)
net.bmahe.genetics4j.core.selection.RouletteWheelSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RouletteWheelSelectionPolicyHandlerTest]/[method:selectMaximizing()] (2 ms)
net.bmahe.genetics4j.core.replacement.ElitismImplTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.replacement.ElitismImplTest]/[method:simple()] (2 ms)
net.bmahe.genetics4j.core.selection.TournamentSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.TournamentSelectionPolicyHandlerTest]/[method:selectMinimize()] (2 ms)
net.bmahe.genetics4j.core.replacement.ElitismImplTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.replacement.ElitismImplTest]/[method:atLeastSpecified()] (3 ms)
net.bmahe.genetics4j.core.selection.MultiTournamentsSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.MultiTournamentsSelectionPolicyHandlerTest]/[method:selectMaxThenMin()] (3 ms)
net.bmahe.genetics4j.core.selection.RouletteWheelSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RouletteWheelSelectionPolicyHandlerTest]/[method:selectMinimizing()] (3 ms)
net.bmahe.genetics4j.core.evaluation.FitnessEvaluatorVirtualThreadTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.evaluation.FitnessEvaluatorVirtualThreadTest]/[method:testVirtualThreadFactory()] (2 ms)
net.bmahe.genetics4j.core.selection.ProportionalTournamentSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.ProportionalTournamentSelectionPolicyHandlerTest]/[method:selectMinimize()] (5 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testSystemConstruction()] (2 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testGetterMethods()] (3 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvaluateOnceWithDifferentGenerations()] (3 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvaluateOnce()] (3 ms)
net.bmahe.genetics4j.core.selection.ProportionalTournamentSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.ProportionalTournamentSelectionPolicyHandlerTest]/[method:selectMaximize()] (83 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvolveWithIntChromosome()] (13 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvolveWithPostEvaluationProcessor()] (22 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvolveWithBitChromosome()] (29 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvolveWithImmediateTermination()] (591 ms)

Report generated by PIT 1.20.3

1		package net.bmahe.genetics4j.core.selection;
2
3		import java.util.List;
4		import java.util.Objects;
5		import java.util.random.RandomGenerator;
6
7		import org.apache.commons.lang3.Validate;
8
9		import net.bmahe.genetics4j.core.Genotype;
10		import net.bmahe.genetics4j.core.Population;
11		import net.bmahe.genetics4j.core.spec.AbstractEAConfiguration;
12		import net.bmahe.genetics4j.core.spec.AbstractEAExecutionContext;
13		import net.bmahe.genetics4j.core.spec.selection.RandomSelection;
14		import net.bmahe.genetics4j.core.spec.selection.SelectionPolicy;
15
16		public class RandomSelectionPolicyHandler<T extends Comparable<T>> implements SelectionPolicyHandler<T> {
17
18		private final RandomGenerator randomGenerator;
19
20		public RandomSelectionPolicyHandler(final RandomGenerator _randomGenerator) {
21		Objects.requireNonNull(_randomGenerator);
22
23	1 1. <init> : Removed assignment to member variable randomGenerator → KILLED	this.randomGenerator = _randomGenerator;
24		}
25
26		@Override
27		public boolean canHandle(final SelectionPolicy selectionPolicy) {
28		Objects.requireNonNull(selectionPolicy);
29	2 1. canHandle : replaced boolean return with true for net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler::canHandle → KILLED 2. canHandle : replaced boolean return with false for net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler::canHandle → KILLED	return selectionPolicy instanceof RandomSelection;
30		}
31
32		@Override
33		public Selector<T> resolve(final AbstractEAExecutionContext<T> eaExecutionContext,
34		final AbstractEAConfiguration<T> eaConfiguration,
35		final SelectionPolicyHandlerResolver<T> selectionPolicyHandlerResolver,
36		final SelectionPolicy selectionPolicy) {
37		Objects.requireNonNull(selectionPolicy);
38		Validate.isInstanceOf(RandomSelection.class, selectionPolicy);
39
40	3 1. resolve : removed call to net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler$1::<init> → KILLED 2. <init> : Removed assignment to member variable this$0 → KILLED 3. resolve : replaced return value with null for net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler::resolve → KILLED	return new Selector<T>() {
41
42		@Override
43		public Population<T> select(final AbstractEAConfiguration<T> eaConfiguration, final long generation,
44		final int numIndividuals, final List<Genotype> population, final List<T> fitnessScore) {
45		Objects.requireNonNull(eaConfiguration);
46		Objects.requireNonNull(population);
47		Objects.requireNonNull(fitnessScore);
48		Validate.isTrue(generation >= 0);
49		Validate.isTrue(numIndividuals > 0);
50		Validate.isTrue(population.size() > 0);
51		Validate.isTrue(fitnessScore.size() > 0);
52		Validate.isTrue(fitnessScore.size() == population.size());
53
54	1 1. select : removed call to net/bmahe/genetics4j/core/Population::<init> → KILLED	final Population<T> selected = new Population<>();
55
56	5 1. select : removed conditional - replaced comparison check with true → TIMED_OUT 2. select : changed conditional boundary → KILLED 3. select : negated conditional → KILLED 4. select : removed conditional - replaced comparison check with false → KILLED 5. select : Substituted 0 with 1 → KILLED	for (int i = 0; i < numIndividuals; i++) {
57	3 1. select : removed call to java/util/List::size → SURVIVED 2. select : replaced call to java/util/random/RandomGenerator::nextInt with argument → KILLED 3. select : removed call to java/util/random/RandomGenerator::nextInt → KILLED	final int selectedIndex = randomGenerator.nextInt(population.size());
58	3 1. select : removed call to net/bmahe/genetics4j/core/Population::add → KILLED 2. select : removed call to java/util/List::get → KILLED 3. select : removed call to java/util/List::get → KILLED	selected.add(population.get(selectedIndex), fitnessScore.get(selectedIndex));
59		}
60	1 1. select : replaced return value with null for net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler$1::select → KILLED	return selected;
61		}
62		};
63		}
64		}
		Mutations
23		1.1 Location : <init> Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] Removed assignment to member variable randomGenerator → KILLED
29		1.1 Location : canHandle Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:canHandle()] replaced boolean return with true for net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler::canHandle → KILLED 2.2 Location : canHandle Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:canHandle()] replaced boolean return with false for net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler::canHandle → KILLED
40		1.1 Location : resolve Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] removed call to net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler$1::<init> → KILLED 2.2 Location : <init> Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] Removed assignment to member variable this$0 → KILLED 3.3 Location : resolve Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] replaced return value with null for net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler::resolve → KILLED
54		1.1 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] removed call to net/bmahe/genetics4j/core/Population::<init> → KILLED
56		1.1 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] changed conditional boundary → KILLED 2.2 Location : select Killed by : none removed conditional - replaced comparison check with true → TIMED_OUT 3.3 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] negated conditional → KILLED 4.4 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] removed conditional - replaced comparison check with false → KILLED 5.5 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] Substituted 0 with 1 → KILLED
57		1.1 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] replaced call to java/util/random/RandomGenerator::nextInt with argument → KILLED 2.2 Location : select Killed by : none removed call to java/util/List::size → SURVIVED Covering tests Covered by tests: net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] 3.3 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] removed call to java/util/random/RandomGenerator::nextInt → KILLED
58		1.1 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] removed call to net/bmahe/genetics4j/core/Population::add → KILLED 2.2 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] removed call to java/util/List::get → KILLED 3.3 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] removed call to java/util/List::get → KILLED
60		1.1 Location : select Killed by : net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:select()] replaced return value with null for net/bmahe/genetics4j/core/selection/RandomSelectionPolicyHandler$1::select → KILLED

RandomSelectionPolicyHandler.java

Mutations

Active mutators

Tests examined