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.scan.filesystem;
021    
022    import com.google.common.collect.Maps;
023    import org.sonar.api.BatchComponent;
024    import org.sonar.api.database.model.Snapshot;
025    import org.sonar.api.utils.KeyValueFormat;
026    import org.sonar.batch.components.PastSnapshot;
027    import org.sonar.batch.components.PastSnapshotFinder;
028    import org.sonar.core.source.SnapshotDataTypes;
029    import org.sonar.core.source.db.SnapshotDataDao;
030    import org.sonar.core.source.db.SnapshotDataDto;
031    
032    import java.util.Arrays;
033    import java.util.Collection;
034    import java.util.Map;
035    
036    public class PreviousFileHashLoader implements BatchComponent {
037    
038      private final SnapshotDataDao dao;
039      private final PastSnapshotFinder pastSnapshotFinder;
040      private final Snapshot snapshot;
041    
042      public PreviousFileHashLoader(Snapshot snapshot, SnapshotDataDao dao, PastSnapshotFinder pastSnapshotFinder) {
043        this.snapshot = snapshot;
044        this.dao = dao;
045        this.pastSnapshotFinder = pastSnapshotFinder;
046      }
047    
048      /**
049       * Extract hash of the files parsed during the previous analysis
050       */
051      Map<String, String> hashByRelativePath() {
052        Map<String, String> map = Maps.newHashMap();
053        PastSnapshot pastSnapshot = pastSnapshotFinder.findPreviousAnalysis(snapshot);
054        if (pastSnapshot.isRelatedToSnapshot()) {
055          Collection<SnapshotDataDto> selectSnapshotData = dao.selectSnapshotData(
056            pastSnapshot.getProjectSnapshot().getId().longValue(),
057            Arrays.asList(SnapshotDataTypes.FILE_HASHES)
058          );
059          if (!selectSnapshotData.isEmpty()) {
060            SnapshotDataDto snapshotDataDto = selectSnapshotData.iterator().next();
061            String data = snapshotDataDto.getData();
062            map = KeyValueFormat.parse(data);
063          }
064        }
065        return map;
066      }
067    
068    }