alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

What this is

This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Other links

The source code

/*
 * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/db/jdbc/RankDAOImplJDBC.java,v 1.6 2005/01/18 11:52:20 minhnn Exp $
 * $Author: minhnn $
 * $Revision: 1.6 $
 * $Date: 2005/01/18 11:52:20 $
 *
 * ====================================================================
 *
 * Copyright (C) 2002-2005 by MyVietnam.net
 *
 * This program 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 2
 * of the License, or any later version.
 *
 * All copyright notices regarding mvnForum MUST remain intact
 * in the scripts and in the outputted HTML.
 * The "powered by" text/logo with a link back to
 * http://www.mvnForum.com and http://www.MyVietnam.net in the
 * footer of the pages MUST remain visible when the pages
 * are viewed on the internet or intranet.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Support can be obtained from support forums at:
 * http://www.mvnForum.com/mvnforum/index
 *
 * Correspondence and Marketing Questions can be sent to:
 * info@MyVietnam.net
 *
 * @author: Minh Nguyen  minhnn@MyVietnam.net
 * @author: Mai  Nguyen  mai.nh@MyVietnam.net
 */
package com.mvnforum.db.jdbc;

import java.sql.*;
import java.util.ArrayList;
import java.util.Collection;

import com.mvnforum.db.RankBean;
import com.mvnforum.db.RankDAO;
import net.myvietnam.mvncore.db.DBUtils;
import net.myvietnam.mvncore.exception.*;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class RankDAOImplJDBC implements RankDAO {

    private static Log log = LogFactory.getLog(RankDAOImplJDBC.class);

    // this variable will support caching if cache for this class is needed
    private static boolean m_dirty = true;

    public RankDAOImplJDBC() {
    }

    public static boolean isDirty() {
        return m_dirty;
    }

    public static void setDirty(boolean dirty) {
        m_dirty = dirty;
    }

    public void findByAlternateKey_RankTitle(String rankTitle)
        throws ObjectNotFoundException, DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("SELECT RankTitle");
        sql.append(" FROM " + TABLE_NAME);
        sql.append(" WHERE RankTitle = ?");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());
            statement.setString(1, rankTitle);
            resultSet = statement.executeQuery();
            if (!resultSet.next()) {
                throw new ObjectNotFoundException("Cannot find the alternate key [RankTitle] (" + rankTitle + ") in table 'Rank'.");
            }
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in RankDAOImplJDBC.findByAlternateKey_RankTitle.");
        } finally {
            DBUtils.closeResultSet(resultSet);
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    public void findByAlternateKey_RankMinPosts(int rankMinPosts)
        throws ObjectNotFoundException, DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("SELECT RankMinPosts");
        sql.append(" FROM " + TABLE_NAME);
        sql.append(" WHERE RankMinPosts = ?");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());
            statement.setInt(1, rankMinPosts);
            resultSet = statement.executeQuery();
            if (!resultSet.next()) {
                throw new ObjectNotFoundException("Cannot find the alternate key [RankMinPosts] (" + rankMinPosts + ") in table 'Rank'.");
            }
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in RankDAOImplJDBC.findByAlternateKey_RankMinPosts.");
        } finally {
            DBUtils.closeResultSet(resultSet);
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    /*
     * Included columns: RankMinPosts, RankLevel, RankTitle, RankImage, RankType,
     *                   RankOption
     * Excluded columns: RankID
     */
    public void create(int rankMinPosts, int rankLevel, String rankTitle,
                       String rankImage, int rankType, int rankOption)
        throws CreateException, DatabaseException, DuplicateKeyException {

        // @todo: Comment this try-catch block if the needed columns dont have attribute 'include'
        // If this is the case, then it is highly recommended that you regenerate this method with the attribute 'include' turned on
        try {
            //Check if alternate key already exists
            findByAlternateKey_RankTitle(rankTitle);
            //If so, then we have to throw an exception
            throw new DuplicateKeyException("Alternate key already exists. Cannot create new Rank with the same [RankTitle] (" + rankTitle + ").");
        } catch(ObjectNotFoundException e) {
            //Otherwise we can go ahead
        }

        // @todo: Comment this try-catch block if the needed columns dont have attribute 'include'
        // If this is the case, then it is highly recommended that you regenerate this method with the attribute 'include' turned on
        try {
            //Check if alternate key already exists
            findByAlternateKey_RankMinPosts(rankMinPosts);
            //If so, then we have to throw an exception
            throw new DuplicateKeyException("Alternate key already exists. Cannot create new Rank with the same [RankMinPosts] (" + rankMinPosts + ").");
        } catch(ObjectNotFoundException e) {
            //Otherwise we can go ahead
        }

        Connection connection = null;
        PreparedStatement statement = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("INSERT INTO " + TABLE_NAME + " (RankMinPosts, RankLevel, RankTitle, RankImage, RankType, RankOption)");
        sql.append(" VALUES (?, ?, ?, ?, ?, ?)");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());

            statement.setInt(1, rankMinPosts);
            statement.setInt(2, rankLevel);
            statement.setString(3, rankTitle);
            statement.setString(4, rankImage);
            statement.setInt(5, rankType);
            statement.setInt(6, rankOption);

            if (statement.executeUpdate() != 1) {
                throw new CreateException("Error adding a row into table 'Rank'.");
            }
            m_dirty = true;
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in RankDAOImplJDBC.create.");
        } finally {
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    /*
     * Included columns: RankMinPosts, RankLevel, RankTitle, RankImage, RankType,
     *                   RankOption
     * Excluded columns: RankID
     */
    public void update(int rankID, // primary key
                       int rankMinPosts, int rankLevel, String rankTitle,
                       String rankImage, int rankType, int rankOption)
        throws ObjectNotFoundException, DatabaseException, DuplicateKeyException {

        RankBean bean = getRank(rankID);

        if ( !rankTitle.equals(bean.getRankTitle()) ) {
            // Rank tries to change its alternate key <RankTitle>, so we must check if it already exist
            try {
                findByAlternateKey_RankTitle(rankTitle);
                throw new DuplicateKeyException("Alternate key [RankTitle] (" + rankTitle + ")already exists. Cannot update Rank.");
            } catch(ObjectNotFoundException e) {
                //Otherwise we can go ahead
            }
        }

        if ( (rankMinPosts != bean.getRankMinPosts()) ) {
            // Rank tries to change its alternate key <RankMinPosts>, so we must check if it already exist
            try {
                findByAlternateKey_RankMinPosts(rankMinPosts);
                throw new DuplicateKeyException("Alternate key [RankMinPosts] (" + rankMinPosts + ")already exists. Cannot update Rank.");
            } catch(ObjectNotFoundException e) {
                //Otherwise we can go ahead
            }
        }

        Connection connection = null;
        PreparedStatement statement = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("UPDATE " + TABLE_NAME + " SET RankMinPosts = ?, RankLevel = ?, RankTitle = ?, RankImage = ?, RankType = ?, RankOption = ?");
        sql.append(" WHERE RankID = ?");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());

            // // column(s) to update
            statement.setInt(1, rankMinPosts);
            statement.setInt(2, rankLevel);
            statement.setString(3, rankTitle);
            statement.setString(4, rankImage);
            statement.setInt(5, rankType);
            statement.setInt(6, rankOption);

            // primary key column(s)
            statement.setInt(7, rankID);

            if (statement.executeUpdate() != 1) {
                throw new ObjectNotFoundException("Cannot update table Rank where primary key = (" + rankID + ").");
            }
            m_dirty = true;
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in RankDAOImplJDBC.update.");
        } finally {
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    public void delete(int rankID)
        throws DatabaseException, ObjectNotFoundException {

        Connection connection = null;
        PreparedStatement statement = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("DELETE FROM " + TABLE_NAME);
        sql.append(" WHERE RankID = ?");

        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());
            statement.setInt(1, rankID);
            if (statement.executeUpdate() != 1) {
                throw new ObjectNotFoundException("Cannot delete a row in table Rank where primary key = (" + rankID + ").");
            }
            m_dirty = true;
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in RankDAOImplJDBC.delete.");
        } finally {
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    /*
     * Included columns: RankMinPosts, RankLevel, RankTitle, RankImage, RankType,
     *                   RankOption
     * Excluded columns: RankID
     */
    public RankBean getRank(int rankID)
        throws ObjectNotFoundException, DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        StringBuffer sql = new StringBuffer(512);
        sql.append("SELECT RankMinPosts, RankLevel, RankTitle, RankImage, RankType, RankOption");
        sql.append(" FROM " + TABLE_NAME);
        sql.append(" WHERE RankID = ?");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());
            statement.setInt(1, rankID);
            resultSet = statement.executeQuery();
            if(!resultSet.next()) {
                throw new ObjectNotFoundException("Cannot find the row in table Rank where primary key = (" + rankID + ").");
            }

            RankBean bean = new RankBean();
            // @todo: uncomment the following line(s) as needed
            bean.setRankID(rankID);
            bean.setRankMinPosts(resultSet.getInt("RankMinPosts"));
            bean.setRankLevel(resultSet.getInt("RankLevel"));
            bean.setRankTitle(resultSet.getString("RankTitle"));
            bean.setRankImage(resultSet.getString("RankImage"));
            bean.setRankType(resultSet.getInt("RankType"));
            bean.setRankOption(resultSet.getInt("RankOption"));
            return bean;
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in RankDAOImplJDBC.getRank(pk).");
        } finally {
            DBUtils.closeResultSet(resultSet);
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    /*
     * Included columns: RankID, RankMinPosts, RankLevel, RankTitle, RankImage,
     *                   RankType, RankOption
     * Excluded columns:
     */
    public Collection getRanks()
        throws DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        Collection retValue = new ArrayList();
        StringBuffer sql = new StringBuffer(512);
        sql.append("SELECT RankID, RankMinPosts, RankLevel, RankTitle, RankImage, RankType, RankOption");
        sql.append(" FROM " + TABLE_NAME);
        //sql.append(" WHERE "); // @todo: uncomment as needed
        sql.append(" ORDER BY RankMinPosts ASC ");
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());
            resultSet = statement.executeQuery();
            while (resultSet.next()) {
                RankBean bean = new RankBean();
                bean.setRankID(resultSet.getInt("RankID"));
                bean.setRankMinPosts(resultSet.getInt("RankMinPosts"));
                bean.setRankLevel(resultSet.getInt("RankLevel"));
                bean.setRankTitle(resultSet.getString("RankTitle"));
                bean.setRankImage(resultSet.getString("RankImage"));
                bean.setRankType(resultSet.getInt("RankType"));
                bean.setRankOption(resultSet.getInt("RankOption"));
                retValue.add(bean);
            }
            return retValue;
        } catch(SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in RankDAOImplJDBC.getRanks.");
        } finally {
            DBUtils.closeResultSet(resultSet);
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    public int getRankIDFromRankTitle(String rankTitle)
        throws ObjectNotFoundException, DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        String sql = "SELECT RankID FROM " + TABLE_NAME +
                     " WHERE RankTitle = ?";
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql);
            statement.setString(1, rankTitle);
            resultSet = statement.executeQuery();
            if (!resultSet.next()) {
                throw new ObjectNotFoundException("Cannot find the alternate key [RankTitle] (" + rankTitle + ") in table 'Rank'.");
            }
            return resultSet.getInt(1);
        } catch (SQLException sqle) {
            log.error("Sql Execution Error!", sqle);
            throw new DatabaseException("Error executing SQL in RankDAOImplJDBC.getRankIDFromRankTitle.");
        } finally {
            DBUtils.closeResultSet(resultSet);
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

}// end of class RankDAOImplJDBC
... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.