/*
* This file is part of the OpenSCADA project
* Copyright (C) 2006-2010 TH4 SYSTEMS GmbH (http://th4-systems.com)
*
* OpenSCADA is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenSCADA 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenSCADA. If not, see
* <http://opensource.org/licenses/lgpl-3.0.html> for a copy of the LGPLv3 License.
*/
package org.openscada.da.ui.connection.data;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.openscada.ui.databinding.AdapterHelper;
public class ItemSelectionHelper
{
/**
* Get all {@link Item} instances from the current selection
* @param selection the selection
* @return the item instances
*/
public static Collection<Item> getSelection ( final ISelection selection )
{
final Collection<Item> items = new LinkedList<Item> ();
if ( selection == null || selection.isEmpty () )
{
return items;
}
if ( selection instanceof IStructuredSelection )
{
final Iterator<?> i = ( (IStructuredSelection)selection ).iterator ();
while ( i.hasNext () )
{
final Item item = (Item)AdapterHelper.adapt ( i.next (), Item.class );
if ( item != null )
{
items.add ( item );
}
}
}
return items;
}
public static Item getFirstFromSelection ( final ISelection selection )
{
for ( final Item item : getSelection ( selection ) )
{
return item;
}
return null;
}
}