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.tasks;
021    
022    import com.google.common.collect.ImmutableSortedMap;
023    import com.google.common.collect.Maps;
024    import org.sonar.api.task.Task;
025    import org.sonar.api.task.TaskComponent;
026    import org.sonar.api.task.TaskDefinition;
027    import org.sonar.api.utils.SonarException;
028    
029    import java.util.Collection;
030    import java.util.Map;
031    import java.util.SortedMap;
032    
033    public class Tasks implements TaskComponent {
034    
035      private final SortedMap<String, TaskDefinition> byKey;
036    
037      public Tasks(TaskDefinition[] definitions) {
038        SortedMap<String, TaskDefinition> map = Maps.newTreeMap();
039        for (TaskDefinition definition : definitions) {
040          if (map.containsKey(definition.key())) {
041            throw new SonarException("Task '" + definition.key() + "' is declared twice");
042          }
043          map.put(definition.key(), definition);
044        }
045        this.byKey = ImmutableSortedMap.copyOf(map);
046      }
047    
048      public TaskDefinition definition(String taskKey) {
049        return byKey.get(taskKey);
050      }
051    
052      public Collection<TaskDefinition> definitions() {
053        return byKey.values();
054      }
055    
056      /**
057       * Perform validation of task definitions
058       */
059      public void start() {
060        checkDuplicatedClasses();
061      }
062    
063      private void checkDuplicatedClasses() {
064        Map<Class<? extends Task>, TaskDefinition> byClass = Maps.newHashMap();
065        for (TaskDefinition def : definitions()) {
066          TaskDefinition other = byClass.get(def.taskClass());
067          if (other == null) {
068            byClass.put(def.taskClass(), def);
069          } else {
070            throw new SonarException("Task '" + def.taskClass().getName() + "' is defined twice: first by '" + other.key() + "' and then by '" + def.key() + "'");
071          }
072        }
073      }
074    }