mvnforumpermissionwebhelper.java

easy to use, easy to setup bulletin board (forum)

/*
 * Copyright (C) 2002 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:
 * [e-mail]
 *
 * @author: Minh Nguyen  [e-mail]
 * @author: Mai  Nguyen  [e-mail]
 */
package net.myvietnam.mvnplugin.mvnforum.auth;

import java.sql.*;
import java.util.ArrayList;
import net.myvietnam.mvncore.exception.*;
import net.myvietnam.mvncore.db.DBUtils;
import net.myvietnam.mvnplugin.mvnforum.MVNForumConstant;
import net.myvietnam.mvnplugin.mvnforum.db.*;

/** @todo support table prefix */
/** @todo review the error message in exceptions */
class MVNForumPermissionWebHelper {

    private static final String GroupPermission = GroupPermissionWebHelper.TABLE_NAME;
    private static final String Groups          = GroupsWebHelper.TABLE_NAME;
    private static final String MemberGroup     = MemberGroupWebHelper.TABLE_NAME;

    private MVNForumPermissionWebHelper() {
    }

    static ArrayList getPermissionsForMember(int memberID)
        throws DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        ArrayList retValue = new ArrayList();
        StringBuffer sql = new StringBuffer(512);
        sql.append("SELECT DISTINCT Permission");
        sql.append(" FROM ").append(GroupPermission).append(", ").append(Groups).append(", ").append(MemberGroup);
        sql.append(" WHERE ( (").append(GroupPermission).append(".GroupID = ").append(Groups).append(".GroupID) AND (").append(Groups).append(".GroupID = ").append(MemberGroup).append(".GroupID) AND (").append(MemberGroup).append(".MemberID = ?) )");
        sql.append("   OR ").append(GroupPermission).append(".GroupID = ").append(MVNForumConstant.GROUP_ID_OF_MEMBER);
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());
            statement.setInt(1, memberID);
            resultSet = statement.executeQuery();
            while (resultSet.next()) {
                Integer perm = new Integer(resultSet.getInt("Permission"));
                retValue.add(perm);
            }
            return retValue;
        } catch(SQLException sqle) {
            sqle.printStackTrace();
            throw new DatabaseException("Error executing SQL in MVNForumPermissionWebHelper.getPermissionsForMember.");
        } finally {
            DBUtils.closeResultSet(resultSet);
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

    static ArrayList getPermissionsForGroupGuest()
        throws DatabaseException {

        Connection connection = null;
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        ArrayList retValue = new ArrayList();
        StringBuffer sql = new StringBuffer(512);
        sql.append("SELECT Permission");
        sql.append(" FROM ").append(GroupPermission);
        sql.append(" WHERE GroupID = ").append(MVNForumConstant.GROUP_ID_OF_GUEST);
        try {
            connection = DBUtils.getConnection();
            statement = connection.prepareStatement(sql.toString());
            resultSet = statement.executeQuery();
            while (resultSet.next()) {
                Integer perm = new Integer(resultSet.getInt("Permission"));
                retValue.add(perm);
            }
            return retValue;
        } catch(SQLException sqle) {
            sqle.printStackTrace();
            throw new DatabaseException("Error executing SQL in MVNForumPermissionWebHelper.getPermissionsForGroupGuest.");
        } finally {
            DBUtils.closeResultSet(resultSet);
            DBUtils.closeStatement(statement);
            DBUtils.closeConnection(connection);
        }
    }

}