| /*************************************************************************************************** |
| * Copyright (c) 2003, 2004 IBM Corporation 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: IBM Corporation - initial API and implementation |
| **************************************************************************************************/ |
| package org.eclipse.wst.common.internal.emf.utilities; |
| |
| import java.io.FileNotFoundException; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.emf.common.notify.Adapter; |
| import org.eclipse.emf.common.util.URI; |
| import org.eclipse.emf.common.util.WrappedException; |
| import org.eclipse.emf.ecore.EAttribute; |
| import org.eclipse.emf.ecore.ENamedElement; |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.ecore.EPackage; |
| import org.eclipse.emf.ecore.EStructuralFeature; |
| import org.eclipse.emf.ecore.InternalEObject; |
| import org.eclipse.emf.ecore.resource.Resource; |
| import org.eclipse.emf.ecore.util.EcoreUtil; |
| import org.eclipse.emf.ecore.xmi.XMLResource; |
| |
| |
| |
| public class ExtendedEcoreUtil extends EcoreUtil { |
| private static FileNotFoundDetector FILE_NOT_FOUND_DETECTOR; |
| private static String NAME_ATTRIBUTE_STRING = "name"; //$NON-NLS-1$ |
| |
| |
| public interface FileNotFoundDetector { |
| boolean isFileNotFound(WrappedException wrappedEx); |
| } |
| |
| public static void setFileNotFoundDetector(FileNotFoundDetector detector) { |
| FILE_NOT_FOUND_DETECTOR = detector; |
| } |
| |
| public static FileNotFoundDetector getFileNotFoundDetector() { |
| if (FILE_NOT_FOUND_DETECTOR == null) { |
| FILE_NOT_FOUND_DETECTOR = new FileNotFoundDetector() { |
| public boolean isFileNotFound(WrappedException wrappedEx) { |
| if (getInnerFileNotFoundException(wrappedEx) != null) |
| return true; |
| return false; |
| } |
| }; |
| } |
| return FILE_NOT_FOUND_DETECTOR; |
| } |
| |
| public static FileNotFoundException getInnerFileNotFoundException(WrappedException wrappedEx) { |
| if (wrappedEx.exception() instanceof java.io.FileNotFoundException) { |
| return (FileNotFoundException) wrappedEx.exception(); |
| } else if (wrappedEx.exception() instanceof WrappedException) { |
| return getInnerFileNotFoundException((WrappedException) wrappedEx.exception()); |
| } |
| return null; |
| } |
| |
| public static void eSetOrAdd(EObject obj, EStructuralFeature feature, Object value) { |
| eSetOrAdd(obj, feature, value, 0); |
| } |
| |
| public static void eSetOrAdd(EObject obj, EStructuralFeature feature, Object value, int newIndex) { |
| if (feature.isMany() && value != null) { |
| if (newIndex >= 0) |
| ((List) obj.eGet(feature)).add(newIndex, value); |
| else |
| ((List) obj.eGet(feature)).add(value); |
| } else { |
| obj.eSet(feature, value); |
| } |
| } |
| |
| public static void eUnsetOrRemove(EObject obj, EStructuralFeature feature, Object value) { |
| if (feature == null || feature.isMany()) |
| ((List) obj.eGet(feature)).remove(value); |
| else |
| obj.eUnset(feature); |
| } |
| |
| public static boolean endsWith(URI sourceUri, URI testUri) { |
| //TODO Waiting on new emf URI API |
| String[] sourceSegments = sourceUri.segments(); |
| String[] testSegments = testUri.segments(); |
| int i = testSegments.length; |
| int j = sourceSegments.length; |
| if (j >= i) { |
| boolean test = true; |
| |
| while (test && i > 0) { |
| i--; |
| j--; |
| test = testSegments[i].equals(sourceSegments[j]); |
| } |
| return test; |
| } |
| return false; |
| } |
| |
| public static String getName(EObject obj) { |
| if (obj == null) |
| return null; |
| if (obj instanceof ENamedElement) |
| return ((ENamedElement) obj).getName(); |
| List allAtts = obj.eClass().getEAllAttributes(); |
| int size = allAtts.size(); |
| EAttribute att, nameAttribute = null; |
| for (int i = 0; i < size; i++) { |
| att = (EAttribute) allAtts.get(i); |
| if (NAME_ATTRIBUTE_STRING.equals(att.getName())) { |
| nameAttribute = att; |
| break; |
| } |
| } |
| if (nameAttribute != null) |
| return (String) obj.eGet(nameAttribute); |
| return null; |
| } |
| |
| public static void addLoadingTag(Resource resource) { |
| resource.eAdapters().add(IsLoadingDetector.INSTANCE); |
| } |
| |
| public static void removeLoadingTag(Resource resource) { |
| resource.eAdapters().remove(IsLoadingDetector.INSTANCE); |
| } |
| |
| /** |
| * Return true if the resource is currently being loaded. This is determined by checking for the |
| * IsLoadingDector in the list of eAdapters on the resource. |
| * |
| * @param resource |
| * @return boolean |
| * |
| * @see addLoadingTag(Resource) |
| * @see removeLoadingTag(Resource) |
| * |
| */ |
| public static boolean isLoading(Resource resource) { |
| if (resource != null) { |
| return resource.eAdapters().contains(IsLoadingDetector.INSTANCE); |
| } |
| return false; |
| } |
| |
| public static Adapter createAdapterForLoading(Adapter targetAdapter, EObject targetObject) { |
| Resource res = targetObject.eResource(); |
| if (res == null || isLoading(res)) |
| return new IsLoadingProxyAdapter(targetAdapter, targetObject); |
| return targetAdapter; |
| } |
| |
| public static void preRegisterPackage(String nsPrefix, EPackage.Descriptor descriptor) { |
| if (!EPackage.Registry.INSTANCE.containsKey(nsPrefix)) |
| EPackage.Registry.INSTANCE.put(nsPrefix, descriptor); |
| } |
| |
| /** |
| * Remove this object from it's container, and make it and all it's children proxies |
| */ |
| public static void unload(EObject root) { |
| Resource res = root.eResource(); |
| EObject container = root.eContainer(); |
| if (container == null) |
| if (res != null) |
| res.getContents().remove(root); |
| else { |
| EStructuralFeature feature = root.eContainmentFeature(); |
| if (feature != null) |
| eUnsetOrRemove(container, feature, root); |
| } |
| if (root != null && res != null) |
| becomeProxy(root, res); |
| } |
| |
| /** |
| * Turns this object and all it's children to proxies, and removes adapters precondition: The |
| * object has been removed from it's container |
| */ |
| public static void becomeProxy(EObject root, Resource res) { |
| Iterator iter = root.eAllContents(); |
| while (iter.hasNext()) { |
| doBecomeProxy((InternalEObject) iter.next(), res); |
| } |
| doBecomeProxy((InternalEObject) root, res); |
| } |
| |
| protected static void doBecomeProxy(InternalEObject p, Resource res) { |
| String id = res.getURIFragment(p); |
| p.eSetProxyURI(res.getURI().appendFragment(id)); |
| if (res instanceof XMLResource) { |
| ((XMLResource) res).setID(p,null); |
| } |
| p.eAdapters().clear(); |
| } |
| |
| public static void removeProxy(EObject root, Resource res) { |
| Iterator iter = root.eAllContents(); |
| while (iter.hasNext()) { |
| doRemoveProxy((InternalEObject) iter.next(), res); |
| } |
| doRemoveProxy((InternalEObject) root, res); |
| } |
| |
| protected static void doRemoveProxy(InternalEObject p, Resource res) { |
| String id = p.eProxyURI().fragment(); |
| if (res instanceof XMLResource) { |
| ((XMLResource) res).setID(p, id); |
| } |
| p.eSetProxyURI(null); |
| } |
| |
| |
| /** |
| * Ensures the passed object is not a proxy; if it is, throws an exception indicating the bad |
| * HREF. If the object is null, does nothing. |
| * |
| * @param object |
| * @throws DanglingHREFException |
| */ |
| public static void checkProxy(EObject object) throws DanglingHREFException { |
| if (object == null || !object.eIsProxy()) |
| return; |
| String msg = WFTUtilsResourceHandler.getString("DANGLING_HREF_ERROR_", new Object[]{((InternalEObject) object).eProxyURI()}); //$NON-NLS-1$ |
| throw new DanglingHREFException(msg); |
| } |
| |
| /** |
| * Return true if o1 and o2 are not the same values. This implementation takes into account that |
| * either parameter can be null. |
| * |
| * @param o1 |
| * @param o2 |
| * @return |
| */ |
| public static boolean valueChanged(Object o1, Object o2) { |
| return (o1 == null ^ o2 == null) || (o1 == null || !o1.equals(o2)); |
| } |
| |
| } |