RemoveCommandHandler.java

/*******************************************************************************
 * Copyright (c) 2012 Torkild U. Resheim.
 * 
 * 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
 * 
 * Contributors: 
 *     Torkild U. Resheim - initial API and implementation
 *******************************************************************************/
package no.resheim.elibrarium.library.ui.views;

import java.util.Iterator;

import no.resheim.elibrarium.library.Book;
import no.resheim.elibrarium.library.core.Librarian;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.handlers.HandlerUtil;

public class RemoveCommandHandler extends AbstractHandler implements IHandler {

	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		ISelection selection = HandlerUtil.getActiveWorkbenchWindow(event).getActivePage().getSelection();
		if (selection != null & selection instanceof IStructuredSelection) {
			IStructuredSelection strucSelection = (IStructuredSelection) selection;
			for (@SuppressWarnings("unchecked")
			Iterator<Object> iterator = strucSelection.iterator(); iterator.hasNext();) {
				Object element = iterator.next();
				Librarian.getDefault().removeBook((Book) element);
			}
		}
		return null;
	}

}