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/*******************************************************************************
* Copyright (c) 2012 CEA LIST.
*
* 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
*******************************************************************************/
package org.eclipse.papyrus.uml.diagram.timing.custom.utils;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.EStructuralFeature.Setting;
import org.eclipse.emf.ecore.util.EcoreUtil;
public final class EcoreUtils {
private EcoreUtils() {
// utility class
}
/**
* Replace an EObject instance by another compatible EObject instance (replacement must be either the same type, or
* a subtype of original).
*
* @param original
* the object to replace
* @param replacement
* the replacement object
*/
public static void replaceEObjectInstance(final EObject original, final EObject replacement) {
final Collection<Setting> settings = EcoreUtil.UsageCrossReferencer.find(original, original.eResource().getResourceSet());
final Set<EStructuralFeature> referencingFeatures = new HashSet<EStructuralFeature>();
for (final Setting setting : settings) {
referencingFeatures.add(setting.getEStructuralFeature());
}
// copy all the features of the original object to the replacement object
copyFeatures(original, replacement, referencingFeatures);
// put the replacement object in all the referencing features of the original object
for (final Setting setting : settings) {
final EStructuralFeature feature = setting.getEStructuralFeature();
if (feature.isChangeable() && !feature.isDerived()) {
// if it is already in the list, remove it and put it at the right index
EcoreUtil.remove(setting, replacement);
// replace the original by the replacement
EcoreUtil.replace(setting, original, replacement);
}
}
// change the container
EcoreUtil.replace(original, replacement);
}
/**
* Copies all the features from the source object to the target object, ignoring the referencingFeatures
*
* @param source
* the object that will give its values to the target object
* @param target
* the object that will receive its values from the source object
* @param referencingFeatures
* features to ignore in the copy
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
private static void copyFeatures(final EObject source, final EObject target, final Set<EStructuralFeature> referencingFeatures) {
final EList<EStructuralFeature> eAllStructuralFeatures = source.eClass().getEAllStructuralFeatures();
for (final EStructuralFeature feature : eAllStructuralFeatures) {
if (referencingFeatures.contains(feature)) {
// the value will be set through the object referencing the "from" object
continue;
}
if (feature instanceof EReference) {
final EReference reference = (EReference) feature;
if (reference.isContainer()) {
// the container will be set at the end
continue;
}
}
if (feature.isChangeable() && !feature.isDerived()) {
if (feature.isMany()) {
final Object result = source.eGet(feature);
if (result instanceof List<?>) {
final List list1 = (List) result;
final List list2 = (List) target.eGet(feature);
list2.addAll(list1);
}
} else {
final Object value = source.eGet(feature);
target.eSet(feature, value);
}
}
}
}
/**
* Return the first element in the container hierarchy of the given element that is of the given class.
*
* @param element
* the starting point
* @param clazz
* the class of the parent that is searched
* @return the first containing element of the given class, or <code>null</code> if none
*/
@SuppressWarnings("unchecked")
public static <T> T getContaining(final EObject element, final Class<T> clazz) {
EObject container = element;
while (container != null) {
if (clazz.isInstance(container)) {
return (T) container;
}
container = container.eContainer();
}
return null;
}
public static EStructuralFeature getEStructuralFeature(final Object notification) {
EStructuralFeature featureImpl = null;
if (notification instanceof Notification) {
final Object feature = ((Notification) notification).getFeature();
if (feature instanceof EStructuralFeature) {
featureImpl = (EStructuralFeature) feature;
}
}
return featureImpl;
}
}
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