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     */
020    package org.sonar.batch;
021    
022    import com.google.common.collect.HashMultimap;
023    import com.google.common.collect.SetMultimap;
024    import org.sonar.api.batch.BatchExtensionDictionnary;
025    import org.sonar.api.batch.Decorator;
026    import org.sonar.api.measures.Metric;
027    import org.sonar.api.resources.Project;
028    
029    import java.util.ArrayList;
030    import java.util.Collection;
031    import java.util.List;
032    
033    public final class DecoratorsSelector {
034    
035      private BatchExtensionDictionnary batchExtDictionnary;
036    
037      public DecoratorsSelector(BatchExtensionDictionnary dictionnary) {
038        this.batchExtDictionnary = dictionnary;
039      }
040    
041      public Collection<Decorator> select(Project project) {
042        List<Decorator> decorators = new ArrayList<Decorator>(batchExtDictionnary.select(Decorator.class, project, false));
043        SetMultimap<Metric, Decorator> decoratorsByGeneratedMetric = getDecoratorsByMetric(decorators);
044        for (Metric metric : batchExtDictionnary.select(Metric.class)) {
045          if (metric.getFormula() != null) {
046            decorators.add(new FormulaDecorator(metric, decoratorsByGeneratedMetric.get(metric)));
047          }
048        }
049    
050        return batchExtDictionnary.sort(decorators);
051      }
052    
053      private SetMultimap<Metric, Decorator> getDecoratorsByMetric(Collection<Decorator> pluginDecorators) {
054        SetMultimap<Metric, Decorator> decoratorsByGeneratedMetric = HashMultimap.create();
055        for (Decorator decorator : pluginDecorators) {
056          List dependents = batchExtDictionnary.getDependents(decorator);
057          for (Object dependent : dependents) {
058            if (dependent instanceof Metric) {
059              decoratorsByGeneratedMetric.put((Metric) dependent, decorator);
060            }
061          }
062        }
063        return decoratorsByGeneratedMetric;
064      }
065    }