/*
    * Copyright (c) 2002-2014, Mairie de Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  package fr.paris.lutece.portal.business.file;
  
  import fr.paris.lutece.portal.business.physicalfile.PhysicalFile;
  import fr.paris.lutece.util.sql.DAOUtil;
  
  
  /**
   * This class provides Data Access methods for Field objects
   */
  public final class FileDAO implements IFileDAO
  {
      // Constants
      private static final String SQL_QUERY_NEW_PK = "SELECT max( id_file ) FROM core_file";
      private static final String SQL_QUERY_FIND_BY_PRIMARY_KEY = "SELECT id_file,title,id_physical_file,file_size,mime_type" +
          " FROM core_file WHERE id_file = ?";
      private static final String SQL_QUERY_INSERT = "INSERT INTO core_file(id_file,title,id_physical_file,file_size,mime_type)" +
          " VALUES(?,?,?,?,?)";
      private static final String SQL_QUERY_DELETE = "DELETE FROM core_file WHERE id_file = ? ";
      private static final String SQL_QUERY_UPDATE = "UPDATE  core_file SET " +
          "id_file=?,title=?,id_physical_file=?,file_size=?,mime_type=? WHERE id_file = ?";
  
      /**
       * Generates a new primary key
       *
       * @return The new primary key
       */
      public int newPrimaryKey(  )
      {
          DAOUtil daoUtil = new DAOUtil( SQL_QUERY_NEW_PK );
          daoUtil.executeQuery(  );
  
          int nKey;
  
          if ( !daoUtil.next(  ) )
          {
              // if the table is empty
              nKey = 1;
          }
  
          nKey = daoUtil.getInt( 1 ) + 1;
          daoUtil.free(  );
  
          return nKey;
      }
  
      /**
       * Insert a new record in the table.
       *
       * @param file instance of the File object to insert
       * @return the id of the new file
       */
      public synchronized int insert( File file )
      {
          file.setIdFile( newPrimaryKey(  ) );
  
          DAOUtil daoUtil = new DAOUtil( SQL_QUERY_INSERT );
          daoUtil.setString( 2, file.getTitle(  ) );
  
          if ( file.getPhysicalFile(  ) != null )
          {
              daoUtil.setInt( 3, file.getPhysicalFile(  ).getIdPhysicalFile(  ) );
          }
          else
          {
              daoUtil.setIntNull( 3 );
          }
 
         daoUtil.setInt( 4, file.getSize(  ) );
         daoUtil.setString( 5, file.getMimeType(  ) );
 
         daoUtil.setInt( 1, file.getIdFile(  ) );
         daoUtil.executeUpdate(  );
 
         daoUtil.free(  );
 
         return file.getIdFile(  );
     }
 
     /**
      * Load the data of the File from the table
      *
      * @param nId The identifier of the file
      * @return the instance of the File
      */
     public File load( int nId )
     {
         DAOUtil daoUtil = new DAOUtil( SQL_QUERY_FIND_BY_PRIMARY_KEY );
         daoUtil.setInt( 1, nId );
         daoUtil.executeQuery(  );
 
         File file = null;
         PhysicalFile physicalFile = null;
 
         if ( daoUtil.next(  ) )
         {
             file = new File(  );
             file.setIdFile( daoUtil.getInt( 1 ) );
             file.setTitle( daoUtil.getString( 2 ) );
 
             if ( daoUtil.getObject( 3 ) != null )
             {
                 physicalFile = new PhysicalFile(  );
                 physicalFile.setIdPhysicalFile( daoUtil.getInt( 3 ) );
                 file.setPhysicalFile( physicalFile );
             }
 
             file.setSize( daoUtil.getInt( 4 ) );
             file.setMimeType( daoUtil.getString( 5 ) );
         }
 
         daoUtil.free(  );
 
         return file;
     }
 
     /**
      * Delete a record from the table
      *
      * @param nIdFile The identifier of the file
      */
     public void delete( int nIdFile )
     {
         DAOUtil daoUtil = new DAOUtil( SQL_QUERY_DELETE );
         daoUtil.setInt( 1, nIdFile );
         daoUtil.executeUpdate(  );
         daoUtil.free(  );
     }
 
     /**
      * Update the file in the table
      *
      * @param file instance of the File object to update
      */
     public void store( File file )
     {
         DAOUtil daoUtil = new DAOUtil( SQL_QUERY_UPDATE );
         daoUtil.setInt( 1, file.getIdFile(  ) );
         daoUtil.setString( 2, file.getTitle(  ) );
 
         if ( file.getPhysicalFile(  ) != null )
         {
             daoUtil.setInt( 3, file.getPhysicalFile(  ).getIdPhysicalFile(  ) );
         }
         else
         {
             daoUtil.setIntNull( 3 );
         }
 
         daoUtil.setInt( 4, file.getSize(  ) );
         daoUtil.setString( 5, file.getMimeType(  ) );
         daoUtil.setInt( 6, file.getIdFile(  ) );
         daoUtil.executeUpdate(  );
         daoUtil.free(  );
     }
 }