dao.CarryonHitsBizAwareQuery.java Source code

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Here is the source code for dao.CarryonHitsBizAwareQuery.java

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/**
* Copyright (c) 2001-2012 "Redbasin Networks, INC," [http://redbasin.org]
*
* This file is part of Redbasin OpenDocShare community project.
*
* Redbasin OpenDocShare is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

package dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import model.Photo;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import util.DbConstants;

/**
  * This class is used by spring to populate a <code>search</code> bean.
  * This class implements CarryonHitsBizAwareQuery
  *
  * @author Smitha Gudur (smitha@redbasin.com)
  * @version $Revision: 1.1 $
  */
class CarryonHitsBizAwareQuery extends BasicDirectQuery {

    // TODO: volatile or use our own connection
    private volatile Vector columnNames = null;
    protected final Log logger = LogFactory.getLog(getClass());

    /**
     * This constructor is called when the Collabrum bean makes a 
     * call to query.execute(). After the query is executed, the result set is
     * returned. For each row in the result set, the mapRow method is called by
     * Spring. In the very first call to mapRow() for the first row in the result
     * set, we make a call to RSMD to get columnNames and cache
     * them to a local array in this object. This way, we can avoid multiple calls
     * to RSMD since, spring calls mapRow many times (one per row in result set).
     *
     */
    public List run(Connection conn, String bid) throws BaseDaoException {

        if (conn == null) {
            return null;
        }

        try {
            String query = "select c1.entryid, hdlogin.login, c1.btitle, c1.hits, bid from carryonhits c1, "
                    + "hdlogin where hdlogin.bid=" + bid + " and c1.loginid=hdlogin.loginid order by hits DESC";

            PreparedStatement stmt = conn.prepareStatement(query);
            if (stmt == null) {
                return null;
            }
            //rs = stmt.executeQuery("select * from carryonhits order by hits DESC");
            ResultSet rs = stmt.executeQuery();
            Vector columnNames = null;
            Photo photo = null;
            List photoList = new ArrayList();

            if (rs != null) {
                columnNames = dbutils.getColumnNames(rs);
                while (rs.next()) {
                    photo = (Photo) eop.newObject(DbConstants.PHOTO);
                    for (int j = 0; j < columnNames.size(); j++) {
                        photo.setValue((String) columnNames.elementAt(j),
                                (String) rs.getString((String) columnNames.elementAt(j)));
                    }
                    photoList.add(photo);
                }
            }
            return photoList;
        } catch (Exception e) {
            throw new BaseDaoException("Error occured while executing carryonhitsbizaware run query ", e);
        }
    }
}