RandomSelectionPolicyHandler.java

package net.bmahe.genetics4j.core.selection;

import java.util.List;
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) {
		Validate.notNull(_randomGenerator);

		this.randomGenerator = _randomGenerator;
	}

	@Override
	public boolean canHandle(final SelectionPolicy selectionPolicy) {
		Validate.notNull(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) {
		Validate.notNull(selectionPolicy);
		Validate.isInstanceOf(RandomSelection.class, selectionPolicy);

		return new Selector<T>() {

			@Override
			public Population<T> select(final AbstractEAConfiguration<T> eaConfiguration, final int numIndividuals,
					final List<Genotype> population, final List<T> fitnessScore) {
				Validate.notNull(eaConfiguration);
				Validate.notNull(population);
				Validate.notNull(fitnessScore);
				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()] (40 ms)
net.bmahe.genetics4j.core.mutation.SupersimpleTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.mutation.SupersimpleTest]/[method:simple()] (3 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.selection.RandomSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.RandomSelectionPolicyHandlerTest]/[method:canHandleRequireSelection()] (1 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.DoubleTournamentSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.DoubleTournamentSelectionPolicyHandlerTest]/[method:selectMaximize()] (4 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.selection.MultiTournamentsSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.MultiTournamentsSelectionPolicyHandlerTest]/[method:selectMaxThenMin()] (4 ms)
net.bmahe.genetics4j.core.selection.DoubleTournamentSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.DoubleTournamentSelectionPolicyHandlerTest]/[method:selectMaximizeAndDoFitnessLast()] (8 ms)
net.bmahe.genetics4j.core.selection.ProportionalTournamentSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.ProportionalTournamentSelectionPolicyHandlerTest]/[method:selectMinimize()] (6 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testGetterMethods()] (6 ms)
net.bmahe.genetics4j.core.selection.DoubleTournamentSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.DoubleTournamentSelectionPolicyHandlerTest]/[method:selectMinimize()] (7 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testSystemConstruction()] (9 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvaluateOnce()] (8 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvaluateOnceWithDifferentGenerations()] (18 ms)
net.bmahe.genetics4j.core.selection.ProportionalTournamentSelectionPolicyHandlerTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.selection.ProportionalTournamentSelectionPolicyHandlerTest]/[method:selectMaximize()] (109 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvolveWithPostEvaluationProcessor()] (23 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvolveWithIntChromosome()] (31 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvolveWithBitChromosome()] (59 ms)
net.bmahe.genetics4j.core.EASystemTest.[engine:junit-jupiter]/[class:net.bmahe.genetics4j.core.EASystemTest]/[method:testEvolveWithImmediateTermination()] (1733 ms)

Report generated by PIT 1.19.6

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

RandomSelectionPolicyHandler.java

Mutations

Active mutators

Tests examined