001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2011 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.plugins.dbcleaner.purges;
021    
022    import org.sonar.api.database.DatabaseSession;
023    import org.sonar.api.database.model.ResourceModel;
024    import org.sonar.plugins.dbcleaner.api.Purge;
025    import org.sonar.plugins.dbcleaner.api.PurgeContext;
026    import org.sonar.plugins.dbcleaner.api.PurgeUtils;
027    
028    import javax.persistence.Query;
029    import java.util.List;
030    
031    /**
032     * @since 2.1
033     */
034    public final class PurgeOrphanResources extends Purge {
035    
036      public PurgeOrphanResources(DatabaseSession session) {
037        super(session);
038      }
039    
040      public void purge(PurgeContext context) {
041        Query query = getSession().createQuery("SELECT r1.id FROM " + ResourceModel.class.getSimpleName() +
042          " r1 WHERE r1.rootId IS NOT NULL AND NOT EXISTS(FROM " + ResourceModel.class.getSimpleName() + " r2 WHERE r1.rootId=r2.id)");
043        List<Integer> idsToDelete = query.getResultList();
044        if (!idsToDelete.isEmpty()) {
045          PurgeUtils.deleteResources(getSession(), idsToDelete);
046        }
047      }
048    }