EmptyDbModel.java

/**
   This file is part of Waarp Project.

   Copyright 2009, Frederic Bregier, and individual contributors by the @author
   tags. See the COPYRIGHT.txt in the distribution for a full listing of
   individual contributors.

   All Waarp Project 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.

   Waarp 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 Waarp .  If not, see <http://www.gnu.org/licenses/>.
 */
package org.waarp.common.database.model;

import java.sql.Connection;
import java.sql.SQLException;

import org.waarp.common.database.DbConstant;
import org.waarp.common.database.DbSession;
import org.waarp.common.database.exception.WaarpDatabaseNoConnectionException;
import org.waarp.common.database.exception.WaarpDatabaseNoDataException;
import org.waarp.common.database.exception.WaarpDatabaseSqlException;

/**
 * Empty DbModel
 * @author "Frederic Bregier"
 *
 */
public class EmptyDbModel implements DbModel {

    /**
     * 
     */
    public EmptyDbModel() {
    }

    @Override
    public Connection getDbConnection(String server, String user, String passwd) throws SQLException {
        return null;
    }

    @Override
    public void releaseResources() {
    }

    @Override
    public int currentNumberOfPooledConnections() {
        return 0;
    }

    @Override
    public DbType getDbType() {
        return DbType.none;
    }

    @Override
    public void createTables(DbSession session) throws WaarpDatabaseNoConnectionException {
    }

    @Override
    public void resetSequence(DbSession session, long newvalue) throws WaarpDatabaseNoConnectionException {
    }

    @Override
    public long nextSequence(DbSession dbSession) throws WaarpDatabaseNoConnectionException, WaarpDatabaseSqlException,
            WaarpDatabaseNoDataException {
        return DbConstant.ILLEGALVALUE;
    }

    @Override
    public void validConnection(DbSession dbSession) throws WaarpDatabaseNoConnectionException {
    }

    @Override
    public String limitRequest(String allfields, String request, int limit) {
        return null;
    }

    @Override
    public boolean upgradeDb(DbSession session, String version) throws WaarpDatabaseNoConnectionException {
        return true;
    }

    @Override
    public boolean needUpgradeDb(DbSession session, String version, boolean tryFix)
            throws WaarpDatabaseNoConnectionException {
        return false;
    }

}