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45 changes: 30 additions & 15 deletions
45
...a/edu/kit/kastel/mcse/ardoco/core/tests/eval/results/calculator/ResultCalculatorUtil.java
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/* Licensed under MIT 2023-2024. */ | ||
package edu.kit.kastel.mcse.ardoco.core.tests.eval.results.calculator; | ||
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import java.util.List; | ||
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import org.eclipse.collections.api.factory.Sets; | ||
import org.eclipse.collections.api.list.ImmutableList; | ||
import org.slf4j.Logger; | ||
import org.slf4j.LoggerFactory; | ||
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import edu.kit.kastel.mcse.ardoco.core.tests.eval.results.EvaluationResults; | ||
import edu.kit.kastel.mcse.ardoco.metrics.ClassificationMetricsCalculator; | ||
import edu.kit.kastel.mcse.ardoco.metrics.result.AggregatedClassificationResult; | ||
import edu.kit.kastel.mcse.ardoco.metrics.result.AggregationType; | ||
import edu.kit.kastel.mcse.ardoco.metrics.result.SingleClassificationResult; | ||
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/** | ||
* This utility class provides methods to form the average of several {@link EvaluationResults} | ||
*/ | ||
public final class ResultCalculatorUtil { | ||
private static final Logger logger = LoggerFactory.getLogger(ResultCalculatorUtil.class); | ||
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private ResultCalculatorUtil() { | ||
throw new IllegalAccessError(); | ||
} | ||
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public static <T> EvaluationResults<T> calculateAverageResults(ImmutableList<EvaluationResults<T>> results) { | ||
var calculator = ClassificationMetricsCalculator.getInstance(); | ||
var classifications = results.stream().map(EvaluationResults::classificationResult).toList(); | ||
var averages = getAverages(results); | ||
if (averages == null) | ||
return null; | ||
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var averages = calculator.calculateAverages(classifications, null); | ||
var macroAverage = averages.stream().filter(it -> it.getType() == AggregationType.MACRO_AVERAGE).findFirst().orElseThrow(); | ||
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var macroAverageAsSingle = new SingleClassificationResult<T>(Sets.mutable.empty(), Sets.mutable.empty(), Sets.mutable.empty(), null, macroAverage | ||
.getPrecision(), macroAverage.getRecall(), macroAverage.getF1(), macroAverage.getAccuracy(), macroAverage.getSpecificity(), macroAverage | ||
.getPhiCoefficient(), macroAverage.getPhiCoefficientMax(), macroAverage.getPhiOverPhiMax()); | ||
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return new EvaluationResults<>(macroAverageAsSingle); | ||
return evaluationResults(macroAverage); | ||
} | ||
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public static <T> EvaluationResults<T> calculateWeightedAverageResults(ImmutableList<EvaluationResults<T>> results) { | ||
var calculator = ClassificationMetricsCalculator.getInstance(); | ||
var classifications = results.stream().map(EvaluationResults::classificationResult).toList(); | ||
var averages = getAverages(results); | ||
if (averages == null) | ||
return null; | ||
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var averages = calculator.calculateAverages(classifications, null); | ||
var macroAverage = averages.stream().filter(it -> it.getType() == AggregationType.WEIGHTED_AVERAGE).findFirst().orElseThrow(); | ||
return evaluationResults(macroAverage); | ||
} | ||
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var weightedAverageAsSingle = new SingleClassificationResult<T>(Sets.mutable.empty(), Sets.mutable.empty(), Sets.mutable.empty(), null, macroAverage | ||
.getPrecision(), macroAverage.getRecall(), macroAverage.getF1(), macroAverage.getAccuracy(), macroAverage.getSpecificity(), macroAverage | ||
.getPhiCoefficient(), macroAverage.getPhiCoefficientMax(), macroAverage.getPhiOverPhiMax()); | ||
private static <T> EvaluationResults<T> evaluationResults(AggregatedClassificationResult average) { | ||
var weightedAverageAsSingle = new SingleClassificationResult<T>(Sets.mutable.empty(), Sets.mutable.empty(), Sets.mutable.empty(), null, average | ||
.getPrecision(), average.getRecall(), average.getF1(), average.getAccuracy(), average.getSpecificity(), average.getPhiCoefficient(), average | ||
.getPhiCoefficientMax(), average.getPhiOverPhiMax()); | ||
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return new EvaluationResults<>(weightedAverageAsSingle); | ||
} | ||
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private static <T> List<AggregatedClassificationResult> getAverages(ImmutableList<EvaluationResults<T>> results) { | ||
if (results.isEmpty()) { | ||
logger.warn("No results to calculate average from"); | ||
return null; | ||
} | ||
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var calculator = ClassificationMetricsCalculator.getInstance(); | ||
var classifications = results.stream().map(EvaluationResults::classificationResult).toList(); | ||
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return calculator.calculateAverages(classifications, null); | ||
} | ||
} |
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