| /******************************************************************************* |
| * Copyright (c) 2009, 2011 SAP AG and others. |
| * 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: |
| * SAP AG - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.ocl.examples.eventmanager.filters; |
| |
| import org.eclipse.emf.common.notify.Notification; |
| import org.eclipse.emf.common.util.EList; |
| import org.eclipse.emf.ecore.EClass; |
| import org.eclipse.emf.ecore.EObject; |
| |
| /** |
| * Matches an event's {@link Notification#getNewValue()} to an |
| * {@link EObject#eClass()} and all subclasses of this {@link EClass}. If the |
| * new value is a collection then this filter matches if at least one of the |
| * collection's elements is matched. |
| * <p> |
| * |
| * When several such filters are combined in an {@link AndFilter}, the |
| * {@link AndFilter} matches if all of its operand filters match. This does not |
| * require the individual {@link NewValueClassFilterIncludingSubclasses}s to |
| * match based on the same element in case the new value happens to be a |
| * collection. For example, assume there are two classes <code>X</code> and |
| * <code>Y</code> with a class <code>Z</code> that has both, <code>X</code> and |
| * <code>Y</code> as its superclasses (multiple inheritance). Assume there is an |
| * {@link AndFiter} with two {@link NewValueClassFilterIncludingSubclasses}s |
| * inside, one matching <code>X</code>, the other matching <code>Y</code>. If |
| * only a single element is the new value of a {@link Notification}, the |
| * {@link AndFilter} matches the notification if and only if the new value |
| * conforms to both, <code>X</code> and <code>Y</code>, for example if its type |
| * is <code>Z</code>. However, if there are two elements in the new value |
| * collection of the {@link Notification}, one of type <code>X</code> and the |
| * other of type <code>Y</code>, the first |
| * {@link NewValueClassFilterIncludingSubclasses} matches because of the |
| * <code>X</code> element, and the second |
| * {@link NewValueClassFilterIncludingSubclasses} matches because of the |
| * <code>Y</code> element and hence the {@link AndFilter} matches. However, no |
| * single element in the new value collection fulfills both criteria. |
| * |
| * @author Philipp Berger, Axel Uhl |
| * |
| */ |
| public class NewValueClassFilterIncludingSubclasses extends ClassFilterIncludingSubclasses { |
| |
| public NewValueClassFilterIncludingSubclasses(EClass subClass, boolean negated) { |
| super(subClass, negated); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#equals(java.lang.Object) |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| NewValueClassFilterIncludingSubclasses other = (NewValueClassFilterIncludingSubclasses) obj; |
| return super.equals(other); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#hashCode() |
| */ |
| @Override |
| public int hashCode() { |
| return 37 * super.hashCode(); |
| } |
| |
| public boolean matchesFor(Notification event) { |
| if (event.getNewValue() instanceof EObject) { |
| return matches(((EObject) event.getNewValue()).eClass()); |
| } |
| if (event.getNewValue() instanceof EList<?>) { |
| for (Object o : (EList<?>) event.getNewValue()) { |
| if (o instanceof EObject && matches(((EObject) o).eClass())) { |
| return true; |
| } |
| } |
| return false; |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| if (getWantedClass() != null) |
| return "new value filter incl subs for new " + getWantedClass().toString(); |
| return "new value filter incl subs for undefined new"; |
| } |
| |
| @Override |
| public NewValueClassFilterIncludingSubclasses clone() { |
| return new NewValueClassFilterIncludingSubclasses(getWantedClass(), isNegated()); |
| } |
| |
| } // NewValueClassFilterImpl |