dao.DirMemberAuthorQuery.java Source code

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Here is the source code for dao.DirMemberAuthorQuery.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.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Vector;
import javax.sql.DataSource;
import model.Directory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.jdbc.core.SqlParameter;

// Certified to be thread-safe 2/19/2005

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

    // 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 messages method 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).
     *
     */

    // dont use collmsgattr.rid as it may have null values and clash with rid of collmessages.
    DirMemberAuthorQuery(DataSource ds) {
        super(ds, "select c1.entryid from diradmin c1, diradmin c2 "
                + "where c1.directoryid=c2.directoryid and c1.ownerid=? " + "and c2.ownerid=? limit 1");
        declareParameter(new SqlParameter("ownerid", Types.BIGINT));
        declareParameter(new SqlParameter("ownerid", Types.BIGINT));
        compile();
    }

    /**
     *  Spring calls this method for each record found in the resultset.
     *  @param rs - result set
     *  @param rowNum - number of rows
     *  @returns Object
     *  @throws SQLException
     */
    protected Object mapRow(ResultSet rs, int rowNum) throws SQLException {

        if (rowNum == 0) {
            // get column names and types from rsmd and save to local array in object
            if (columnNames == null) {
                columnNames = dbutils.getColumnNames(rs);
            }
        }
        Directory dir = (Directory) eop.newObject("directory");
        for (int j = 0; j < columnNames.size(); j++) {
            dir.setValue((String) columnNames.elementAt(j),
                    (String) rs.getString((String) columnNames.elementAt(j)));
        }
        return dir; // we return becos spring requires it. 
    }

}