/******************************************************************************
 * Copyright (c) 2007 g-Eclipse consortium 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Initial development of the original code was made for
 * project g-Eclipse founded by European Union
 * project number: FP6-IST-034327  http://www.geclipse.eu/
 *
 * Contributor(s):
 *     Szymon Mueller
 *           
 *****************************************************************************/
package eu.geclipse.servicejob.ui.actions;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

import eu.geclipse.core.model.IGridComputing;
import eu.geclipse.core.model.IGridProject;
import eu.geclipse.core.model.IGridResource;
import eu.geclipse.servicejob.ui.wizard.ServiceJobWizard;

/**
 * Action for running service job on grid computing element.
 */
public class ServiceJobComputingAction implements IObjectActionDelegate {

  private IWorkbenchPart workbench;
  private IGridProject selectedProject;
  private List<IGridResource> selecedComputingEls = new ArrayList<IGridResource>();

  public void run( final IAction action ) {
    if( this.selecedComputingEls.size() > 0 ) {
      ServiceJobWizard wizard = new ServiceJobWizard( this.selectedProject,
                                          this.selecedComputingEls );
      WizardDialog dialog = new WizardDialog( this.workbench.getSite()
        .getShell(), wizard );
      dialog.open();
    }
  }

  public void setActivePart( final IAction action,
                             final IWorkbenchPart targetPart )
  {
    this.workbench = targetPart;
  }

  public void selectionChanged( final IAction action, final ISelection selection )
  {
    this.selecedComputingEls = new ArrayList<IGridResource>();
    if( selection instanceof IStructuredSelection ) {
      IStructuredSelection sselection = ( IStructuredSelection )selection;
      if( !sselection.isEmpty() ) {
        if( sselection.getFirstElement() instanceof IGridComputing ) {
          this.selectedProject = ( ( IGridComputing )sselection.getFirstElement() ).getProject();
          for( Object selObj : sselection.toList() ) {
            if( selObj instanceof IGridComputing
                && ( ( IGridComputing )selObj ).getProject() != null
                && ( ( IGridComputing )selObj ).getProject()
                  .equals( this.selectedProject ) )
            {
              this.selecedComputingEls.add( ( IGridComputing )selObj );
            }
          }
        }
      }
    }
  }
}