| /******************************************************************************* |
| * Copyright (c) 2009, 2018 SAP AG and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v20.html |
| * |
| * Contributors: |
| * SAP AG - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.ocl.examples.eventmanager.filters; |
| |
| import org.eclipse.emf.common.notify.Notification; |
| import org.eclipse.ocl.examples.eventmanager.EventFilter; |
| import org.eclipse.ocl.examples.eventmanager.framework.LogicalOperationFilterImpl; |
| |
| |
| /** |
| * Is an {@link LogicalOperationFilter} and implements the not-operator. |
| * Not applies only for one {@link EventFilter} so the {@link NotFilter} |
| * can only contain one operand. |
| * |
| * @author Philipp Berger, Axel Uhl |
| * |
| */ |
| public class NotFilter extends LogicalOperationFilterImpl { |
| public NotFilter() { |
| super(); |
| } |
| |
| /** |
| * The standard constructor |
| * @param subTypeFilterTree the filter to negate |
| */ |
| public NotFilter(EventFilter subTypeFilterTree) { |
| super(subTypeFilterTree); |
| } |
| |
| public boolean matchesFor(Notification event) { |
| if (getOperands().isEmpty()) |
| return true; |
| return !(getOperands().iterator().next().matchesFor(event)); |
| } |
| |
| @Override |
| public NotFilter clone() { |
| return new NotFilter(cloneContents()[0]); |
| |
| } |
| @Override |
| public String toString() { |
| StringBuilder bld = new StringBuilder(); |
| for (EventFilter f : getOperands()) { |
| bld.append("NOT("); |
| bld.append(f.toString()); |
| bld.append(")"); |
| } |
| |
| return bld.toString(); |
| } |
| } |