/*
    * This file is part of Waarp Project (named also Waarp or GG).
    *
    *  Copyright (c) 2019, Waarp SAS, 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 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;
  import org.waarp.common.database.model.DbModelAbstract.DbTypeResolver;
  
  import java.sql.Connection;
  import java.sql.SQLException;
  
  /**
   * Empty DbModel
   */
  public class EmptyDbModel implements DbModel {
  
    /**
     *
     */
    public EmptyDbModel() {
      // nothing
    }
  
    @Override
    public final Connection getDbConnection(final String server,
                                            final String user,
                                            final String passwd)
        throws SQLException {
      return null;
    }
  
    @Override
    public final void releaseResources() {
      // nothing
    }
  
    @Override
    public final int currentNumberOfPooledConnections() {
      return 0;
    }
  
    @Override
    public final DbType getDbType() {
      return DbType.none;
    }
  
    @Override
    public final DbTypeResolver getDbTypeResolver() {
      return null;
    }
  
    @Override
    public final void createTables(final DbSession session)
        throws WaarpDatabaseNoConnectionException {
      // nothing
    }
  
    @Override
    public final void resetSequence(final DbSession session, final long newvalue)
        throws WaarpDatabaseNoConnectionException {
      // nothing
    }
  
    @Override
    public final long nextSequence(final DbSession dbSession)
        throws WaarpDatabaseNoConnectionException, WaarpDatabaseSqlException,
               WaarpDatabaseNoDataException {
      return DbConstant.ILLEGALVALUE;
    }
  
    @Override
    public final void validConnection(final DbSession dbSession)
        throws WaarpDatabaseNoConnectionException {
      // nothing
    }
  
    @Override
    public final String limitRequest(final String allfields, final String request,
                                     final int limit) {
     return null;
   }
 
   @Override
   public final boolean upgradeDb(final DbSession session, final String version)
       throws WaarpDatabaseNoConnectionException {
     return true;
   }
 
   @Override
   public final boolean needUpgradeDb(final DbSession session,
                                      final String version, final boolean tryFix)
       throws WaarpDatabaseNoConnectionException {
     return false;
   }
 
 }