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.batch;
021    
022    import org.sonar.api.batch.BatchExtensionDictionnary;
023    import org.sonar.api.batch.Decorator;
024    import org.sonar.api.batch.FormulaDecorator;
025    import org.sonar.api.measures.Metric;
026    import org.sonar.api.resources.Project;
027    
028    import java.util.*;
029    
030    public class DecoratorsSelector {
031    
032      private BatchExtensionDictionnary dictionnary;
033    
034      public DecoratorsSelector(BatchExtensionDictionnary dictionnary) {
035        this.dictionnary = dictionnary;
036      }
037    
038      public Collection<Decorator> select(Project project) {
039        List<Decorator> decorators = new ArrayList<Decorator>(dictionnary.select(Decorator.class, project, false));
040        Set<Metric> coveredMetrics = getMetricsCoveredByPlugins(decorators);
041        for (Metric metric : dictionnary.select(Metric.class)) {
042          if (metric.getFormula() != null && !coveredMetrics.contains(metric)) {
043            decorators.add(new FormulaDecorator(metric));
044          }
045        }
046    
047        return dictionnary.sort(decorators);
048      }
049    
050      private Set<Metric> getMetricsCoveredByPlugins(Collection<Decorator> pluginDecorators) {
051        Set<Metric> coveredMetrics = new HashSet<Metric>();
052        for (Decorator pluginDecorator : pluginDecorators) {
053          List dependents = dictionnary.getDependents(pluginDecorator);
054          for (Object dependent : dependents) {
055            if (dependent instanceof Metric) {
056              coveredMetrics.add((Metric) dependent);
057            }
058          }
059        }
060        return coveredMetrics;
061      }
062    }