/*

  * $Source: /usr/cvsroot/melati/melati/src/main/java/org/melati/servlet/PoemFileDataAdaptorFactory.java,v $

  * $Revision: 1.12 $

  *

  * Copyright (C) 2000 Myles Chippendale

  *

  * Part of Melati (http://melati.org), a framework for the rapid

  * development of clean, maintainable web applications.

  *

  * Melati is free software; Permission is granted to copy, distribute

  * and/or modify this software under the terms either:

  *

  * a) the GNU General Public License as published by the Free Software

  *    Foundation; either version 2 of the License, or (at your option)

  *    any later version,

  *

  *    or

  *

  * b) any version of the Melati Software License, as published

  *    at http://melati.org

  *

  * You should have received a copy of the GNU General Public License and

  * the Melati Software License along with this program;

  * if not, write to the Free Software Foundation, Inc.,

  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the

  * GNU General Public License and visit http://melati.org to obtain the

  * Melati Software License.

  *

  * Feel free to contact the Developers of Melati (http://melati.org),

  * if you would like to work out a different arrangement than the options

  * outlined here.  It is our intention to allow Melati to be used by as

  * wide an audience as possible.

  *

  * 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.

  *

  * Contact details for copyright holder:

  *

  *     Mylesc Chippendale <mylesc@paneris.org>

  *     http://paneris.org/

  *     29 Stanley Road, Oxford, OX4 1QY, UK

  */

 package org.melati.servlet;

 import org.melati.Melati;

 import org.melati.poem.AccessToken;

 import org.melati.poem.Database;

 import org.melati.poem.PoemException;

 import org.melati.poem.PoemTask;

 import org.melati.poem.PoemThread;

 /**

  * Save the uploaded file to disk in a particular directory which has a

  * particular URL.

  * 

  * We get these values from the values of <code>UploadDir</code> and

  * <code>UploadURL</code> in the Setting table of the current Database.

  */

 public class PoemFileDataAdaptorFactory extends FormDataAdaptorFactory {

   private String uploadDir;

   private String uploadURL;

   /**

    * Get the defaulted parameters for the adaptor from the database and create

    * it.

    * 

    * @param melati

    *          the {@link Melati}

    * @param field

    *          a {@link MultipartFormField}

    * @return a {@link FormDataAdaptor}

    */

   public synchronized FormDataAdaptor getIt(Melati melati,

       MultipartFormField field) {

     if (uploadDir == null || uploadURL == null) {

       final Database db = melati.getDatabase();

       if (PoemThread.inSession()) {

         uploadDir = (String) db.getSettingTable().getOrDie("UploadDir");

         uploadURL = (String) db.getSettingTable().getOrDie("UploadURL");

       } else {

         db.inSession(AccessToken.root, new PoemTask() {

           public void run() throws PoemException {

             uploadDir = (String) db.getSettingTable().getOrDie("UploadDir");

             uploadURL = (String) db.getSettingTable().getOrDie("UploadURL");

           }

           public String toString() {

             return "Getting UploadDir and UploadURL settings";

           }

         });

       }

     }

     return new DefaultFileDataAdaptor(melati, melati.getConfig().getRealPath()

         + uploadDir, uploadURL);

   }

 }