| /* |
| * Copyright (c) 2004, 2006 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 - initial API and implementation |
| * |
| * $Id: CacheAdapter.java,v 1.12.2.1 2006/09/05 20:04:00 khussey Exp $ |
| */ |
| package org.eclipse.uml2.common.util; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.emf.common.notify.Notification; |
| import org.eclipse.emf.common.notify.Notifier; |
| import org.eclipse.emf.common.util.EList; |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.ecore.EReference; |
| import org.eclipse.emf.ecore.resource.Resource; |
| import org.eclipse.emf.ecore.resource.ResourceSet; |
| import org.eclipse.emf.ecore.util.ECrossReferenceAdapter; |
| import org.eclipse.emf.ecore.util.EcoreUtil; |
| |
| public class CacheAdapter |
| extends ECrossReferenceAdapter { |
| |
| public static final CacheAdapter INSTANCE = new CacheAdapter(); |
| |
| private final Map values = Collections.synchronizedMap(new HashMap()); |
| |
| protected boolean adapting = false; |
| |
| public static CacheAdapter getCacheAdapter(Notifier notifier) { |
| List eAdapters = notifier.eAdapters(); |
| |
| for (int i = 0, size = eAdapters.size(); i < size; i++) { |
| Object adapter = eAdapters.get(i); |
| |
| if (adapter instanceof CacheAdapter) { |
| return (CacheAdapter) adapter; |
| } |
| } |
| |
| return null; |
| } |
| |
| protected boolean addAdapter(EList adapters) { |
| return adapters.contains(this) |
| ? false |
| : adapters.add(this); |
| } |
| |
| public boolean adapt(Notifier notifier) { |
| boolean result = false; |
| |
| if (notifier != null) { |
| adapting = true; |
| result = addAdapter(notifier.eAdapters()); |
| adapting = false; |
| } |
| |
| return result; |
| } |
| |
| protected void addAdapter(Notifier notifier) { |
| addAdapter(notifier.eAdapters()); |
| } |
| |
| protected void addAdapter(EObject eObject) { |
| |
| if (eObject != null && !eObject.eIsProxy()) { |
| Resource eResource = eObject.eResource(); |
| |
| if (eResource == null) { |
| addAdapter(EcoreUtil.getRootContainer(eObject).eAdapters()); |
| } else { |
| ResourceSet resourceSet = eResource.getResourceSet(); |
| |
| if (resourceSet == null) { |
| addAdapter(eResource.eAdapters()); |
| } else { |
| addAdapter(resourceSet.eAdapters()); |
| } |
| } |
| } |
| } |
| |
| public Collection getNonNavigableInverseReferences(EObject eObject) { |
| addAdapter(eObject); |
| |
| return super.getNonNavigableInverseReferences(eObject); |
| } |
| |
| public Collection getInverseReferences(EObject eObject) { |
| addAdapter(eObject); |
| |
| return super.getInverseReferences(eObject); |
| } |
| |
| public void handleCrossReference(EObject eObject) { |
| inverseCrossReferencer.add(eObject); |
| } |
| |
| public void setTarget(Notifier target) { |
| |
| if (!adapting) { |
| super.setTarget(target); |
| } |
| } |
| |
| protected void unsetTarget(EObject target) { |
| super.unsetTarget(target); |
| |
| clear(target.eResource()); |
| } |
| |
| protected void unsetTarget(Resource target) { |
| super.unsetTarget(target); |
| |
| clear(target); |
| } |
| |
| public void notifyChanged(Notification msg) { |
| super.notifyChanged(msg); |
| |
| Object notifier = msg.getNotifier(); |
| |
| if (notifier instanceof EObject) { |
| clear(((EObject) notifier).eResource()); |
| } else if (notifier instanceof Resource) { |
| |
| if (msg.getFeatureID(Resource.class) == Resource.RESOURCE__CONTENTS) { |
| clear(); |
| } |
| } |
| } |
| |
| public void clear() { |
| values.clear(); |
| } |
| |
| public void clear(Resource resource) { |
| values.remove(resource); |
| |
| if (resource != null) { |
| values.remove(null); |
| } |
| } |
| |
| public boolean containsKey(EObject eObject, Object key) { |
| return containsKey(null, eObject, key); |
| } |
| |
| public boolean containsKey(Resource resource, EObject eObject, Object key) { |
| Map resourceMap = (Map) values.get(resource); |
| |
| if (resourceMap != null) { |
| Map eObjectMap = (Map) resourceMap.get(eObject); |
| |
| if (eObjectMap != null) { |
| return eObjectMap.containsKey(key); |
| } |
| } |
| |
| return false; |
| } |
| |
| public Object get(EObject eObject, Object key) { |
| return get(null, eObject, key); |
| } |
| |
| public Object get(Resource resource, EObject eObject, Object key) { |
| Map resourceMap = (Map) values.get(resource); |
| |
| if (resourceMap != null) { |
| Map eObjectMap = (Map) resourceMap.get(eObject); |
| |
| if (eObjectMap != null) { |
| return eObjectMap.get(key); |
| } |
| } |
| |
| return null; |
| } |
| |
| public Object put(EObject eObject, Object key, Object value) { |
| return put(null, eObject, key, value); |
| } |
| |
| public Object put(Resource resource, EObject eObject, Object key, |
| Object value) { |
| |
| if (key == null) { |
| throw new IllegalArgumentException(String.valueOf(key)); |
| } |
| |
| Map resourceMap = (Map) values.get(resource); |
| |
| if (resourceMap == null) { |
| resourceMap = new HashMap(); |
| |
| values.put(resource, resourceMap); |
| } |
| |
| Map eObjectMap = (Map) resourceMap.get(eObject); |
| |
| if (eObjectMap == null) { |
| eObjectMap = new HashMap(); |
| |
| resourceMap.put(eObject, eObjectMap); |
| } |
| |
| return eObjectMap.put(key, value); |
| } |
| |
| protected boolean resolve() { |
| return false; |
| } |
| |
| protected boolean isIncluded(EReference eReference) { |
| return super.isIncluded(eReference) && eReference.isChangeable(); |
| } |
| |
| } |