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[MATH-776] Use same range check in ctor as in setter for ElitisticListPopulation. 

Thanks to Reid Hochstedler

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1308454 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Thomas Neidhart 2012-04-02 18:46:42 +00:00
parent c016eb832b
commit b9ca51f09f
3 changed files with 63 additions and 3 deletions
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6
src/changes/changes.xml
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@ -52,6 +52,12 @@ If the output is not quite correct, check for invisible trailing spaces!
<body>
<release version="3.1" date="TBD" description="
">
<action dev="tn" type="fix" issue="MATH-776" due-to="Reid Hochstedler">
Use same range check in constructor for ElitisticListPopulation as in corresponding setter.
</action>
<action dev="tn" type="fix" issue="MATH-767" due-to="Dennis Hendriks">
Fixed unbalanced use of code tags in javadoc of several classes.
</action>
<action dev="tn" type="add" issue="MATH-773" due-to="Reid Hochstedler">
Added class FixedElapsedTime (new StoppingCondition for evolution of generations) to genetics package.
</action>

8
src/main/java/org/apache/commons/math3/genetics/ElitisticListPopulation.java
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@ -24,7 +24,7 @@ import org.apache.commons.math3.exception.util.LocalizedFormats;
import org.apache.commons.math3.util.FastMath;
/**
* Population of chromosomes which uses elitism (certain percentace of the best
* Population of chromosomes which uses elitism (certain percentage of the best
* chromosomes is directly copied to the next generation).
*
* @version $Id$
@ -42,12 +42,13 @@ public class ElitisticListPopulation extends ListPopulation {
* @param populationLimit maximal size of the population
* @param elitismRate how many best chromosomes will be directly transferred to the
* next generation [in %]
* @throws OutOfRangeException if the elitism rate is outside the [0, 1] range
*/
public ElitisticListPopulation(final List<Chromosome> chromosomes,
final int populationLimit,
final double elitismRate) {
super(chromosomes, populationLimit);
this.elitismRate = elitismRate;
setElitismRate(elitismRate);
}
/**
@ -57,10 +58,11 @@ public class ElitisticListPopulation extends ListPopulation {
* @param populationLimit maximal size of the population
* @param elitismRate how many best chromosomes will be directly transferred to the
* next generation [in %]
* @throws OutOfRangeException if the elitism rate is outside the [0, 1] range
*/
public ElitisticListPopulation(final int populationLimit, final double elitismRate) {
super(populationLimit);
this.elitismRate = elitismRate;
setElitismRate(elitismRate);
}
/**

52
src/test/java/org/apache/commons/math3/genetics/ElitisticListPopulationTest.java
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@ -17,6 +17,10 @@
package org.apache.commons.math3.genetics;
import java.util.Collections;
import java.util.List;
import org.apache.commons.math3.exception.OutOfRangeException;
import org.junit.Assert;
import org.junit.Test;
@ -37,6 +41,54 @@ public class ElitisticListPopulationTest {
Assert.assertEquals(20, nextGeneration.getPopulationSize());
}
@Test
public void testSetElitismRate() {
final double rate = 0.25;
final ElitisticListPopulation pop = new ElitisticListPopulation(100, 0.203);
pop.setElitismRate(rate);
Assert.assertEquals(rate, pop.getElitismRate(), 1e-6);
}
@Test(expected = OutOfRangeException.class)
public void testSetElitismRateTooLow() {
final double rate = -0.25;
final ElitisticListPopulation pop = new ElitisticListPopulation(100, 0.203);
pop.setElitismRate(rate);
}
@Test(expected = OutOfRangeException.class)
public void testSetElitismRateTooHigh() {
final double rate = 1.25;
final ElitisticListPopulation pop = new ElitisticListPopulation(100, 0.203);
pop.setElitismRate(rate);
}
@Test(expected = OutOfRangeException.class)
public void testConstructorTooLow() {
final double rate = -0.25;
new ElitisticListPopulation(100, rate);
}
@Test(expected = OutOfRangeException.class)
public void testConstructorTooHigh() {
final double rate = 1.25;
new ElitisticListPopulation(100, rate);
}
@Test(expected = OutOfRangeException.class)
public void testChromosomeListConstructorTooLow() {
final List<Chromosome> chromosomes = Collections.emptyList();
final double rate = -0.25;
new ElitisticListPopulation(chromosomes, 100, rate);
}
@Test(expected = OutOfRangeException.class)
public void testChromosomeListConstructorTooHigh() {
final List<Chromosome> chromosomes = Collections.emptyList();
final double rate = 1.25;
new ElitisticListPopulation(chromosomes, 100, rate);
}
private static class DummyChromosome extends Chromosome {
private final int fitness;