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The source code/* * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/db/jdbc/GroupPermissionDAOImplJDBC.java,v 1.6 2005/01/18 11:52:19 minhnn Exp $ * $Author: minhnn $ * $Revision: 1.6 $ * $Date: 2005/01/18 11:52:19 $ * * ==================================================================== * * 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 org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.mvnforum.db.*; import net.myvietnam.mvncore.db.DBUtils; import net.myvietnam.mvncore.exception.*; public class GroupPermissionDAOImplJDBC implements GroupPermissionDAO { private static Log log = LogFactory.getLog(GroupPermissionDAOImplJDBC.class); // this variable will support caching if cache for this class is needed private static boolean m_dirty = true; public GroupPermissionDAOImplJDBC() { } protected static boolean isDirty() { return m_dirty; } protected static void setDirty(boolean dirty) { m_dirty = dirty; } public void findByPrimaryKey(int groupID, int permission) throws ObjectNotFoundException, DatabaseException { Connection connection = null; PreparedStatement statement = null; ResultSet resultSet = null; StringBuffer sql = new StringBuffer(512); sql.append("SELECT GroupID, Permission"); sql.append(" FROM " + TABLE_NAME); sql.append(" WHERE GroupID = ? AND Permission = ?"); try { connection = DBUtils.getConnection(); statement = connection.prepareStatement(sql.toString()); statement.setInt(1, groupID); statement.setInt(2, permission); resultSet = statement.executeQuery(); if (!resultSet.next()) { throw new ObjectNotFoundException("Cannot find the primary key (" + groupID + ", " + permission + ") in table 'GroupPermission'."); } } catch(SQLException sqle) { log.error("Sql Execution Error!", sqle); throw new DatabaseException("Error executing SQL in GroupPermissionDAOImplJDBC.findByPrimaryKey."); } finally { DBUtils.closeResultSet(resultSet); DBUtils.closeStatement(statement); DBUtils.closeConnection(connection); } } /* * Included columns: GroupID, Permission * Excluded columns: */ public void create(int groupID, int permission) throws CreateException, DatabaseException, DuplicateKeyException, ForeignKeyNotFoundException { // @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 // However, if primary key is a auto_increament column, then you can safely delete this block try { //Check if primary key already exists findByPrimaryKey(groupID, permission); //If so, then we have to throw an exception throw new DuplicateKeyException("Primary key already exists. Cannot create new GroupPermission with the same [GroupID, Permission] (" + groupID + ", " + permission + ")."); } catch(ObjectNotFoundException e) { //Otherwise we can go ahead } try { // @todo: modify the parameter list as needed // You may have to regenerate this method if the needed columns dont have attribute 'include' DAOFactory.getGroupsDAO().findByPrimaryKey(groupID); } catch(ObjectNotFoundException e) { throw new ForeignKeyNotFoundException("Foreign key refers to table 'Groups' does not exist. Cannot create new GroupPermission."); } Connection connection = null; PreparedStatement statement = null; StringBuffer sql = new StringBuffer(512); sql.append("INSERT INTO " + TABLE_NAME + " (GroupID, Permission)"); sql.append(" VALUES (?, ?)"); try { connection = DBUtils.getConnection(); statement = connection.prepareStatement(sql.toString()); statement.setInt(1, groupID); statement.setInt(2, permission); if (statement.executeUpdate() != 1) { throw new CreateException("Error adding a row into table 'GroupPermission'."); } m_dirty = true; } catch(SQLException sqle) { log.error("Sql Execution Error!", sqle); throw new DatabaseException("Error executing SQL in GroupPermissionDAOImplJDBC.create."); } finally { DBUtils.closeStatement(statement); DBUtils.closeConnection(connection); } } public void delete(int groupID, int permission) throws DatabaseException, ObjectNotFoundException { Connection connection = null; PreparedStatement statement = null; StringBuffer sql = new StringBuffer(512); sql.append("DELETE FROM " + TABLE_NAME); sql.append(" WHERE GroupID = ? AND Permission = ?"); try { connection = DBUtils.getConnection(); statement = connection.prepareStatement(sql.toString()); statement.setInt(1, groupID); statement.setInt(2, permission); if (statement.executeUpdate() != 1) { throw new ObjectNotFoundException("Cannot delete a row in table GroupPermission where primary key = (" + groupID + ", " + permission + ")."); } m_dirty = true; } catch(SQLException sqle) { log.error("Sql Execution Error!", sqle); throw new DatabaseException("Error executing SQL in GroupPermissionDAOImplJDBC.delete."); } finally { DBUtils.closeStatement(statement); DBUtils.closeConnection(connection); } } public void delete_inGroup(int groupID) throws DatabaseException { Connection connection = null; PreparedStatement statement = null; StringBuffer sql = new StringBuffer(512); sql.append("DELETE FROM " + TABLE_NAME); sql.append(" WHERE GroupID = ? "); try { connection = DBUtils.getConnection(); statement = connection.prepareStatement(sql.toString()); statement.setInt(1, groupID); statement.executeUpdate(); m_dirty = true; } catch(SQLException sqle) { log.error("Sql Execution Error!", sqle); throw new DatabaseException("Error executing SQL in GroupPermissionDAOImplJDBC.delete_inGroup."); } finally { DBUtils.closeStatement(statement); DBUtils.closeConnection(connection); } } /************************************************ * Customized methods come below ************************************************/ /* * Included columns: Permission * Excluded columns: GroupID */ public Collection getBeans_inGroup(int groupID) throws DatabaseException { Connection connection = null; PreparedStatement statement = null; ResultSet resultSet = null; Collection retValue = new ArrayList(); StringBuffer sql = new StringBuffer(512); sql.append("SELECT Permission"); sql.append(" FROM " + TABLE_NAME); sql.append(" WHERE GroupID = ?"); // @todo: uncomment as needed //sql.append(" ORDER BY ColumnName ASC|DESC "); // @todo: uncomment as needed try { connection = DBUtils.getConnection(); statement = connection.prepareStatement(sql.toString()); statement.setInt(1, groupID); resultSet = statement.executeQuery(); while (resultSet.next()) { GroupPermissionBean bean = new GroupPermissionBean(); bean.setGroupID(groupID); bean.setPermission(resultSet.getInt("Permission")); retValue.add(bean); } return retValue; } catch(SQLException sqle) { log.error("Sql Execution Error!", sqle); throw new DatabaseException("Error executing SQL in GroupPermissionDAOImplJDBC.getBeans_inGroup."); } finally { DBUtils.closeResultSet(resultSet); DBUtils.closeStatement(statement); DBUtils.closeConnection(connection); } } /* * Included columns: GroupID * Excluded columns: Permission */ public Collection getDistinctGroups() throws DatabaseException { Connection connection = null; PreparedStatement statement = null; ResultSet resultSet = null; Collection retValue = new ArrayList(); StringBuffer sql = new StringBuffer(512); sql.append("SELECT DISTINCT GroupID"); sql.append(" FROM " + TABLE_NAME); sql.append(" ORDER BY GroupID ASC "); try { connection = DBUtils.getConnection(); statement = connection.prepareStatement(sql.toString()); resultSet = statement.executeQuery(); while (resultSet.next()) { GroupPermissionBean bean = new GroupPermissionBean(); bean.setGroupID(resultSet.getInt("GroupID")); retValue.add(bean); } return retValue; } catch(SQLException sqle) { log.error("Sql Execution Error!", sqle); throw new DatabaseException("Error executing SQL in GroupPermissionDAOImplJDBC.getDistinctGroups."); } finally { DBUtils.closeResultSet(resultSet); DBUtils.closeStatement(statement); DBUtils.closeConnection(connection); } } }// end of class GroupPermissionDAOImplJDBC |
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