001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2009 SonarSource SA
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar 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     * Sonar 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
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.api.measures;
021    
022    import org.apache.commons.lang.StringUtils;
023    
024    import java.util.Collection;
025    
026    /**
027     * @since 1.10
028     */
029    public final class MeasureUtils {
030    
031      private MeasureUtils() {
032      }
033    
034      /**
035       * Return true if all measures have numeric value.
036       */
037      public static boolean haveValues(Measure... measures) {
038        if (measures == null || measures.length == 0) {
039          return false;
040        }
041        for (Measure measure : measures) {
042          if (!hasValue(measure)) {
043            return false;
044          }
045        }
046        return true;
047      }
048    
049      /**
050       * Get the measure value. Return <code>defaultValue</code> if measure is null or has no values.
051       */
052      public static Double getValue(Measure measure, Double defaultValue) {
053        if (MeasureUtils.hasValue(measure)) {
054          return measure.getValue();
055        }
056        return defaultValue;
057      }
058    
059      public static boolean hasValue(Measure measure) {
060        return measure != null && measure.getValue() != null;
061      }
062    
063      public static boolean hasData(Measure measure) {
064        return measure != null && StringUtils.isNotBlank(measure.getData());
065      }
066    
067      public static Double sum(boolean zeroIfNone, Collection<Measure> measures) {
068        if (measures != null) {
069          return sum(zeroIfNone, measures.toArray(new Measure[measures.size()]));
070        }
071        return zeroIfNone(zeroIfNone);
072      }
073    
074      public static Double sum(boolean zeroIfNone, Measure... measures) {
075        if (measures == null) {
076          return zeroIfNone(zeroIfNone);
077        }
078        Double sum = 0d;
079        boolean hasValue = false;
080        for (Measure measure : measures) {
081          if (measure != null && measure.getValue() != null) {
082            hasValue = true;
083            sum += measure.getValue();
084          }
085        }
086    
087        if (hasValue) {
088          return sum;
089        }
090        return zeroIfNone(zeroIfNone);
091      }
092    
093      private static Double zeroIfNone(boolean zeroIfNone) {
094        return zeroIfNone ? 0d : null;
095      }
096    }