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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 |
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