001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2012 SonarSource
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.index;
021    
022    import com.google.common.collect.Sets;
023    import org.sonar.api.database.DatabaseSession;
024    import org.sonar.api.database.model.Snapshot;
025    import org.sonar.api.database.model.SnapshotSource;
026    import org.sonar.api.resources.DuplicatedSourceException;
027    import org.sonar.api.resources.Resource;
028    
029    import java.util.Set;
030    
031    public final class SourcePersister {
032    
033      private DatabaseSession session;
034      private Set<Integer> savedSnapshotIds = Sets.newHashSet();
035      private ResourcePersister resourcePersister;
036    
037      public SourcePersister(DatabaseSession session, ResourcePersister resourcePersister) {
038        this.session = session;
039        this.resourcePersister = resourcePersister;
040      }
041    
042      public void saveSource(Resource resource, String source) {
043        Snapshot snapshot = resourcePersister.getSnapshotOrFail(resource);
044        if (isCached(snapshot)) {
045          throw new DuplicatedSourceException(resource);
046        }
047        session.save(new SnapshotSource(snapshot.getId(), source));
048        session.commit();
049        addToCache(snapshot);
050      }
051    
052      public String getSource(Resource resource) {
053        SnapshotSource source = null;
054        Snapshot snapshot = resourcePersister.getSnapshot(resource);
055        if (snapshot!=null && snapshot.getId()!=null) {
056          source = session.getSingleResult(SnapshotSource.class, "snapshotId", snapshot.getId());
057        }
058        return source!=null ? source.getData() : null;
059      }
060    
061      private boolean isCached(Snapshot snapshot) {
062        return savedSnapshotIds.contains(snapshot.getId());
063      }
064    
065      private void addToCache(Snapshot snapshot) {
066        savedSnapshotIds.add(snapshot.getId());
067      }
068    
069      public void clear() {
070        savedSnapshotIds.clear();
071      }
072    }