001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.documentlibrary.service.persistence;
016    
017    import com.liferay.portal.kernel.dao.orm.QueryPos;
018    import com.liferay.portal.kernel.dao.orm.SQLQuery;
019    import com.liferay.portal.kernel.dao.orm.Session;
020    import com.liferay.portal.kernel.dao.orm.Type;
021    import com.liferay.portal.kernel.exception.SystemException;
022    import com.liferay.portal.service.persistence.impl.BasePersistenceImpl;
023    import com.liferay.portlet.documentlibrary.model.DLFileRank;
024    import com.liferay.util.dao.orm.CustomSQLUtil;
025    
026    import java.util.List;
027    
028    /**
029     * @author Alexander Chow
030     */
031    public class DLFileRankFinderImpl
032            extends BasePersistenceImpl<DLFileRank> implements DLFileRankFinder {
033    
034            public static final String FIND_BY_STALE_RANKS =
035                    DLFileRankFinder.class.getName() + ".findByStaleRanks";
036    
037            @Override
038            public List<Object[]> findByStaleRanks(int count) throws SystemException {
039                    Session session = null;
040    
041                    try {
042                            session = openSession();
043    
044                            String sql = CustomSQLUtil.get(FIND_BY_STALE_RANKS);
045    
046                            SQLQuery q = session.createSQLQuery(sql);
047    
048                            q.addScalar("groupId", Type.LONG);
049                            q.addScalar("userId", Type.LONG);
050    
051                            QueryPos qPos = QueryPos.getInstance(q);
052    
053                            qPos.add(count);
054    
055                            return q.list(true);
056                    }
057                    catch (Exception e) {
058                            throw new SystemException(e);
059                    }
060                    finally {
061                            closeSession(session);
062                    }
063            }
064    
065    }