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.squid.math;
021    
022    import java.util.Collection;
023    import java.util.Map;
024    import java.util.TreeMap;
025    
026    import org.sonar.squid.api.SourceCode;
027    import org.sonar.squid.measures.Metric;
028    
029    public class MeasuresDistribution {
030    
031      private final Collection<SourceCode> units;
032    
033      public MeasuresDistribution(Collection<SourceCode> units) {
034        this.units = units;
035      }
036    
037      public Map<Integer, Integer> distributeAccordingTo(Metric metric, int... thresholds) {
038        Map<Integer, Integer> result = new TreeMap<Integer, Integer>();
039        for (int i = 0; i < thresholds.length; i++) {
040          result.put(thresholds[i], 0);
041        }
042        for (SourceCode unit : units) {
043          for (int index = 0; index < thresholds.length; index++) {
044            if (isInFirstRange(index, unit.getDouble(metric), thresholds[index])) {
045              result.put(thresholds[0], result.get(thresholds[0]) + 1);
046              break;
047            } else if (unit.getDouble(metric) < thresholds[index]) {
048              result.put(thresholds[index - 1], result.get(thresholds[index - 1]) + 1);
049              break;
050            } else if (isLastRange(index, thresholds)) {
051              result.put(thresholds[index], result.get(thresholds[index]) + 1);
052            }
053          }
054        }
055        return result;
056      }
057    
058      private boolean isLastRange(int index, int[] thresholds) {
059        return index == thresholds.length - 1;
060      }
061    
062      private boolean isInFirstRange(int index, double measure, int threshold) {
063        return index == 0 && measure < threshold;
064      }
065    }