package org.openswing.swing.gantt.client;

import java.lang.reflect.*;
import java.util.*;

import org.openswing.swing.message.receive.java.*;


/**
 * <p>Title: OpenSwing Framework</p>
 * <p>Description: Class used to retrieve all rows for the gantt control,
 * by calling the server side, using the serverMethodName property and ClientUtils.getData method.</p>
 * <p>Copyright: Copyright (C) 2006 Mauro Carniel</p>
 *
 * <p> This file is part of OpenSwing Framework.
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the (LGPL) Lesser General Public
 * License as published by the Free Software Foundation;
 *
 *                GNU LESSER GENERAL PUBLIC LICENSE
 *                 Version 2.1, February 1999
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *       The author may be contacted at:
 *           maurocarniel@tin.it</p>
 *
 * @author Mauro Carniel
 * @version 1.0
 */
public class ServerGanttDataLocator implements GanttDataLocator {

  /** method to call on the server side */
  private String serverMethodName = null;



  /**
   * Method invoked by the grid to load a block or rows.
   * @param params gantt parameters
   * @return response from the server: an object of type VOListResponse if data loading was successfully completed, or an ErrorResponse onject if some error occours
   */
  public Response loadData(Map params) {
    try {
      Method m = Class.forName("org.openswing.swing.util.client.ClientUtils").getMethod("getData",new Class[]{String.class,Object.class});
      return (Response)m.invoke(null,new Object[]{serverMethodName,params});
    }
    catch (Throwable ex) {
      return new ErrorResponse("Error while loading data:\n"+ex.toString());
    }
  }



  /**
   * @return method to call on the server side
   */
  public final String getServerMethodName() {
    return serverMethodName;
  }


  /**
   * Set the method to call on the server side.
   * @param serverMethodName method to call on the server side
   */
  public final void setServerMethodName(String serverMethodName) {
    this.serverMethodName = serverMethodName;
  }



}