org.sonar.api.measures.MeanAggregationFormula Maven / Gradle / Ivy
/*
* Sonar, open source software quality management tool.
* Copyright (C) 2009 SonarSource SA
* mailto:contact AT sonarsource DOT com
*
* Sonar is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* Sonar is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sonar; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
*/
package org.sonar.api.measures;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/**
* @since 2.0
*/
public class MeanAggregationFormula implements Formula {
private boolean forceZeroIfMissingData=false;
public MeanAggregationFormula(boolean forceZeroIfMissingData) {
this.forceZeroIfMissingData = forceZeroIfMissingData;
}
public MeanAggregationFormula() {
this(false);
}
public List dependsUponMetrics() {
return Collections.emptyList();
}
public Measure calculate(FormulaData data, FormulaContext context) {
double sum=0.0;
int count=0;
boolean hasValue=false;
Collection measures = data.getChildrenMeasures(context.getTargetMetric());
for (Measure measure : measures) {
if (MeasureUtils.hasValue(measure)) {
sum+=measure.getValue();
count++;
hasValue=true;
}
}
if (!hasValue && !forceZeroIfMissingData) {
return null;
}
return new Measure(context.getTargetMetric(), (count==0 ? 0.0 : sum/count));
}
}