com.astra.ses.spell.dev.commands.GetExplorerSelection.java Source code

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///////////////////////////////////////////////////////////////////////////////
//
// PACKAGE   : com.astra.ses.spell.dev.commands
// 
// FILE      : GetExplorerSelection.java
//
// DATE      : Mar 22, 2011
//
// Copyright (C) 2008, 2011 SES ENGINEERING, Luxembourg S.A.R.L.
//
// By using this software in any way, you are agreeing to be bound by
// the terms of this license.
//
// 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
//
// NO WARRANTY
// EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE PROGRAM IS PROVIDED
// ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER
// EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR
// CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A
// PARTICULAR PURPOSE. Each Recipient is solely responsible for determining
// the appropriateness of using and distributing the Program and assumes all
// risks associated with its exercise of rights under this Agreement ,
// including but not limited to the risks and costs of program errors,
// compliance with applicable laws, damage to or loss of data, programs or
// equipment, and unavailability or interruption of operations.
//
// DISCLAIMER OF LIABILITY
// EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NEITHER RECIPIENT NOR ANY
// CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATION
// LOST PROFITS), 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 OR DISTRIBUTION OF THE PROGRAM OR THE
// EXERCISE OF ANY RIGHTS GRANTED HEREUNDER, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGES.
//
// Contributors:
//    SES ENGINEERING - initial API and implementation and/or initial documentation
//
// PROJECT   : SPELL
//
// SUBPROJECT: SPELL DEV
//
///////////////////////////////////////////////////////////////////////////////
package com.astra.ses.spell.dev.commands;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

import com.astra.ses.spell.dev.views.ProcedureExplorerView;

/*******************************************************************************
 * 
 * {@link GetExplorerSelection} returns the selected elements in the procedure
 * explorer
 ******************************************************************************/
public class GetExplorerSelection extends AbstractHandler {

    public static final String CMD_ID = "com.astra.ses.spell.dev.views.explorer.getSelection";

    /*==========================================================================
     * (non-Javadoc)
     * @see AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
     =========================================================================*/
    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        /*
         * Return an array of Object if there are selected elements in the view
         * Otherwise null is returned
         */
        Object[] result = null;

        if (PlatformUI.isWorkbenchRunning()) {
            IWorkbenchWindow activeWindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
            if (activeWindow == null) {
                return null;
            }
            if (activeWindow.getActivePage() == null) {
                return null;
            }

            IViewPart explorerView = activeWindow.getActivePage().findView(ProcedureExplorerView.ID);
            if (explorerView != null) {
                ISelection selection = ((ProcedureExplorerView) explorerView).getCommonViewer().getSelection();
                IStructuredSelection structuredSelection = (IStructuredSelection) selection;
                result = structuredSelection.toArray();
            }
        }

        return result;
    }

}