plugins/org.eclipse.uml2.common/src/org/eclipse/uml2/common/util/CacheAdapter.java - uml2/org.eclipse.uml2.test - Git at Google

 /*
  * Copyright (c) 2004, 2007 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 1.12.2.6 2007/02/08 14:34:35 khussey Exp $
  */
 package org.eclipse.uml2.common.util;

 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.WeakHashMap;

 import org.eclipse.emf.common.notify.Notification;
 import org.eclipse.emf.common.notify.Notifier;
 import org.eclipse.emf.common.util.BasicEList;
 import org.eclipse.emf.common.util.EList;
 import org.eclipse.emf.common.util.URI;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.EReference;
 import org.eclipse.emf.ecore.InternalEObject;
 import org.eclipse.emf.ecore.resource.Resource;
 import org.eclipse.emf.ecore.resource.ResourceSet;
 import org.eclipse.emf.ecore.resource.URIConverter;
 import org.eclipse.emf.ecore.util.ECrossReferenceAdapter;
 import org.eclipse.emf.ecore.util.EcoreUtil;

 public class CacheAdapter
 		extends ECrossReferenceAdapter {

 	protected class InverseCrossReferencer
 			extends ECrossReferenceAdapter.InverseCrossReferencer {

 		private URI normalizeURI(URI uri, Resource resourceContext) {
 			String fragment = uri.fragment();

 			if (fragment != null) {
 				int length = fragment.length();

 				if (length > 0 && fragment.charAt(0) != '/'
 					&& fragment.charAt(length - 1) == '?') {

 					int index = fragment.lastIndexOf('?', length - 2);

 					if (index > 0) {
 						uri = uri.trimFragment().appendFragment(
 							fragment.substring(0, index));
 					}
 				}
 			}

 			if (uriConverter != null) {
 				return uriConverter.normalize(uri);
 			} else if (resourceContext != null) {
 				ResourceSet resourceSetContext = resourceContext
 					.getResourceSet();

 				if (resourceSetContext != null) {
 					return resourceSetContext.getURIConverter().normalize(uri);
 				}
 			}

 			return uri;
 		}

 		protected URI normalizeURI(URI uri, EObject objectContext) {
 			return normalizeURI(uri, objectContext.eResource());
 		}

 		protected void addProxy(EObject proxy, EObject context) {

 			if (proxy.eIsProxy()) {

 				if (proxyMap == null) {
 					proxyMap = createHashMap();
 				}

 				Resource resource = context.eResource();

 				if (resource != null) {
 					addAdapter(resource);
 				}

 				URI uri = normalizeURI(((InternalEObject) proxy).eProxyURI(),
 					resource);
 				List proxies = (List) proxyMap.get(uri);

 				if (proxies == null) {
 					proxyMap.put(uri, proxies = new BasicEList.FastCompare());
 				}

 				proxies.add(proxy);
 			}
 		}
 	}

 	public static final CacheAdapter INSTANCE = createCacheAdapter();

 	private static CacheAdapter createCacheAdapter() {
 		String property = System
 			.getProperty("org.eclipse.uml2.common.util.CacheAdapter.INSTANCE"); //$NON-NLS-1$

 		if (!UML2Util.isEmpty(property)) {

 			try {
 				return (CacheAdapter) Class.forName(property).newInstance();
 			} catch (Exception e) {
 				// ignore
 			}
 		}

 		return new CacheAdapter();
 	}

 	private final Map values = Collections.synchronizedMap(createHashMap());

 	protected boolean adapting = false;

 	private URIConverter uriConverter = null;

 	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;
 	}

 	public CacheAdapter() {
 		super();

 		unloadedResources = new Set() {

 			Map map = new WeakHashMap();

 			public boolean add(Object o) {

 				if (map.containsKey(o)) {
 					return false;
 				}

 				map.put(o, null);
 				return true;
 			}

 			public boolean addAll(Collection c) {
 				boolean result = false;

 				for (Iterator i = c.iterator(); i.hasNext();) {

 					if (add(i.next())) {
 						result = true;
 					}
 				}

 				return result;
 			}

 			public void clear() {
 				map.keySet().clear();
 			}

 			public boolean contains(Object o) {
 				return map.keySet().contains(o);
 			}

 			public boolean containsAll(Collection c) {
 				return map.keySet().containsAll(c);
 			}

 			public boolean isEmpty() {
 				return map.keySet().isEmpty();
 			}

 			public Iterator iterator() {
 				return map.keySet().iterator();
 			}

 			public boolean remove(Object o) {
 				return map.keySet().remove(o);
 			}

 			public boolean removeAll(Collection c) {
 				return map.keySet().removeAll(c);
 			}

 			public boolean retainAll(Collection c) {
 				return map.keySet().retainAll(c);
 			}

 			public int size() {
 				return map.keySet().size();
 			}

 			public Object[] toArray() {
 				return map.keySet().toArray();
 			}

 			public Object[] toArray(Object[] a) {
 				return map.keySet().toArray(a);
 			}
 		};
 	}

 	protected Map createHashMap() {
 		return new HashMap();
 	}

 	protected ECrossReferenceAdapter.InverseCrossReferencer createInverseCrossReferencer() {
 		return new InverseCrossReferencer();
 	}

 	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 at resource scope iff not unloading
 		if (uriConverter == null) {
 			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 at resource scope iff not touch
 			if (!msg.isTouch()) {
 				clear(((EObject) notifier).eResource());
 			}
 		} else if (notifier instanceof Resource) {

 			switch (msg.getFeatureID(Resource.class)) {
 				case Resource.RESOURCE__CONTENTS : {
 					clear();

 					if (uriConverter == null) {
 						Resource resource = (Resource) notifier;

 						if (!resource.isLoaded()) {
 							ResourceSet resourceSet = resource.getResourceSet();

 							if (resourceSet != null) {
 								// cache URI converter during unload
 								uriConverter = resourceSet.getURIConverter();
 							}
 						}
 					}

 					break;
 				}
 				case Resource.RESOURCE__IS_LOADED : {

 					if (!msg.getNewBooleanValue()) {
 						uriConverter = null;
 					}

 					break;
 				}
 			}
 		}
 	}

 	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));
 		}

 		if (resource != null) {
 			addAdapter(resource);
 		}

 		Map resourceMap = (Map) values.get(resource);

 		if (resourceMap == null) {
 			resourceMap = Collections.synchronizedMap(createHashMap());

 			values.put(resource, resourceMap);
 		}

 		Map eObjectMap = (Map) resourceMap.get(eObject);

 		if (eObjectMap == null) {
 			eObjectMap = Collections.synchronizedMap(createHashMap());

 			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();
 	}

 }
	/*
	* Copyright (c) 2004, 2007 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 1.12.2.6 2007/02/08 14:34:35 khussey Exp $
	*/
	package org.eclipse.uml2.common.util;

	import java.util.Collection;
	import java.util.Collections;
	import java.util.HashMap;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;
	import java.util.WeakHashMap;

	import org.eclipse.emf.common.notify.Notification;
	import org.eclipse.emf.common.notify.Notifier;
	import org.eclipse.emf.common.util.BasicEList;
	import org.eclipse.emf.common.util.EList;
	import org.eclipse.emf.common.util.URI;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.EReference;
	import org.eclipse.emf.ecore.InternalEObject;
	import org.eclipse.emf.ecore.resource.Resource;
	import org.eclipse.emf.ecore.resource.ResourceSet;
	import org.eclipse.emf.ecore.resource.URIConverter;
	import org.eclipse.emf.ecore.util.ECrossReferenceAdapter;
	import org.eclipse.emf.ecore.util.EcoreUtil;

	public class CacheAdapter
	extends ECrossReferenceAdapter {

	protected class InverseCrossReferencer
	extends ECrossReferenceAdapter.InverseCrossReferencer {

	private URI normalizeURI(URI uri, Resource resourceContext) {
	String fragment = uri.fragment();

	if (fragment != null) {
	int length = fragment.length();

	if (length > 0 && fragment.charAt(0) != '/'
	&& fragment.charAt(length - 1) == '?') {

	int index = fragment.lastIndexOf('?', length - 2);

	if (index > 0) {
	uri = uri.trimFragment().appendFragment(
	fragment.substring(0, index));
	}
	}
	}

	if (uriConverter != null) {
	return uriConverter.normalize(uri);
	} else if (resourceContext != null) {
	ResourceSet resourceSetContext = resourceContext
	.getResourceSet();

	if (resourceSetContext != null) {
	return resourceSetContext.getURIConverter().normalize(uri);
	}
	}

	return uri;
	}

	protected URI normalizeURI(URI uri, EObject objectContext) {
	return normalizeURI(uri, objectContext.eResource());
	}

	protected void addProxy(EObject proxy, EObject context) {

	if (proxy.eIsProxy()) {

	if (proxyMap == null) {
	proxyMap = createHashMap();
	}

	Resource resource = context.eResource();

	if (resource != null) {
	addAdapter(resource);
	}

	URI uri = normalizeURI(((InternalEObject) proxy).eProxyURI(),
	resource);
	List proxies = (List) proxyMap.get(uri);

	if (proxies == null) {
	proxyMap.put(uri, proxies = new BasicEList.FastCompare());
	}

	proxies.add(proxy);
	}
	}
	}

	public static final CacheAdapter INSTANCE = createCacheAdapter();

	private static CacheAdapter createCacheAdapter() {
	String property = System
	.getProperty("org.eclipse.uml2.common.util.CacheAdapter.INSTANCE"); //$NON-NLS-1$

	if (!UML2Util.isEmpty(property)) {

	try {
	return (CacheAdapter) Class.forName(property).newInstance();
	} catch (Exception e) {
	// ignore
	}
	}

	return new CacheAdapter();
	}

	private final Map values = Collections.synchronizedMap(createHashMap());

	protected boolean adapting = false;

	private URIConverter uriConverter = null;

	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;
	}

	public CacheAdapter() {
	super();

	unloadedResources = new Set() {

	Map map = new WeakHashMap();

	public boolean add(Object o) {

	if (map.containsKey(o)) {
	return false;
	}

	map.put(o, null);
	return true;
	}

	public boolean addAll(Collection c) {
	boolean result = false;

	for (Iterator i = c.iterator(); i.hasNext();) {

	if (add(i.next())) {
	result = true;
	}
	}

	return result;
	}

	public void clear() {
	map.keySet().clear();
	}

	public boolean contains(Object o) {
	return map.keySet().contains(o);
	}

	public boolean containsAll(Collection c) {
	return map.keySet().containsAll(c);
	}

	public boolean isEmpty() {
	return map.keySet().isEmpty();
	}

	public Iterator iterator() {
	return map.keySet().iterator();
	}

	public boolean remove(Object o) {
	return map.keySet().remove(o);
	}

	public boolean removeAll(Collection c) {
	return map.keySet().removeAll(c);
	}

	public boolean retainAll(Collection c) {
	return map.keySet().retainAll(c);
	}

	public int size() {
	return map.keySet().size();
	}

	public Object[] toArray() {
	return map.keySet().toArray();
	}

	public Object[] toArray(Object[] a) {
	return map.keySet().toArray(a);
	}
	};
	}

	protected Map createHashMap() {
	return new HashMap();
	}

	protected ECrossReferenceAdapter.InverseCrossReferencer createInverseCrossReferencer() {
	return new InverseCrossReferencer();
	}

	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 at resource scope iff not unloading
	if (uriConverter == null) {
	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 at resource scope iff not touch
	if (!msg.isTouch()) {
	clear(((EObject) notifier).eResource());
	}
	} else if (notifier instanceof Resource) {

	switch (msg.getFeatureID(Resource.class)) {
	case Resource.RESOURCE__CONTENTS : {
	clear();

	if (uriConverter == null) {
	Resource resource = (Resource) notifier;

	if (!resource.isLoaded()) {
	ResourceSet resourceSet = resource.getResourceSet();

	if (resourceSet != null) {
	// cache URI converter during unload
	uriConverter = resourceSet.getURIConverter();
	}
	}
	}

	break;
	}
	case Resource.RESOURCE__IS_LOADED : {

	if (!msg.getNewBooleanValue()) {
	uriConverter = null;
	}

	break;
	}
	}
	}
	}

	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));
	}

	if (resource != null) {
	addAdapter(resource);
	}

	Map resourceMap = (Map) values.get(resource);

	if (resourceMap == null) {
	resourceMap = Collections.synchronizedMap(createHashMap());

	values.put(resource, resourceMap);
	}

	Map eObjectMap = (Map) resourceMap.get(eObject);

	if (eObjectMap == null) {
	eObjectMap = Collections.synchronizedMap(createHashMap());

	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();
	}

	}