001/* 002 * SonarQube, open source software quality management tool. 003 * Copyright (C) 2008-2014 SonarSource 004 * mailto:contact AT sonarsource DOT com 005 * 006 * SonarQube is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 3 of the License, or (at your option) any later version. 010 * 011 * SonarQube is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public License 017 * along with this program; if not, write to the Free Software Foundation, 018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 019 */ 020package org.sonar.api.measures; 021 022import java.util.Collections; 023import java.util.List; 024 025/** 026 * @since 1.11 027 */ 028public class SumChildValuesFormula implements Formula { 029 030 private boolean saveZeroIfNoChildValues; 031 032 public SumChildValuesFormula(boolean saveZeroIfNoChildValues) { 033 this.saveZeroIfNoChildValues = saveZeroIfNoChildValues; 034 } 035 036 @Override 037 public List<Metric> dependsUponMetrics() { 038 return Collections.emptyList(); 039 } 040 041 @Override 042 public Measure calculate(FormulaData data, FormulaContext context) { 043 Double sum = MeasureUtils.sum(saveZeroIfNoChildValues, data.getChildrenMeasures(context.getTargetMetric())); 044 if (sum != null) { 045 return new Measure(context.getTargetMetric(), sum); 046 } 047 return null; 048 } 049}