UnexecutableHandler.java

/**
 * Copyright 2004-2016 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform 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 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.e4.ui.handler;

import javax.inject.Named;

import org.eclipse.e4.core.di.annotations.CanExecute;
import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.services.IServiceConstants;
import org.whole.lang.bindings.IBindingManager;

/**
 * @author Enrico Persiani
 */
public class UnexecutableHandler {
	private static class SingletonHolder {
		private static final UnexecutableHandler instance = new UnexecutableHandler();
	}

	public static UnexecutableHandler instance() {
		return SingletonHolder.instance;
	}


	@CanExecute
	public boolean canExecute(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) IBindingManager bm) {
		return false;
	}

	@Execute
	public void execute(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) IBindingManager bm) {
	}
}