457341: [Model Import] Identify and fix performances bottlenecks

https://bugs.eclipse.org/bugs/show_bug.cgi?id=457341

- Tentative fix for the Dangling URIs performances in Phase 1

6 files changed, 624 insertions, 353 deletions

diff --git a/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/handler/ImportHandler.java b/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/handler/ImportHandler.java
index 13cc300ba03..8c47f03f2c9 100644
--- a/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/handler/ImportHandler.java
+++ b/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/handler/ImportHandler.java
@@ -28,7 +28,7 @@ import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.papyrus.migration.rsa.Activator;
 import org.eclipse.papyrus.migration.rsa.RSAToPapyrusParameters.Config;
-import org.eclipse.papyrus.migration.rsa.transformation.ConfigHelper;
+import org.eclipse.papyrus.migration.rsa.RSAToPapyrusParameters.RSAToPapyrusParametersFactory;
 import org.eclipse.papyrus.migration.rsa.transformation.ImportTransformationLauncher;
 import org.eclipse.papyrus.views.properties.creation.PropertyEditorFactory;
 import org.eclipse.swt.widgets.Control;
@@ -109,9 +109,7 @@ public class ImportHandler extends AbstractHandler {
 	}
 
 	public Config getTransformationParameters(ExecutionEvent event) {
-		ConfigHelper helper = new ConfigHelper();
-
-		Config config = helper.getConfig();
+		Config config = RSAToPapyrusParametersFactory.eINSTANCE.createConfig();
 
 		Shell activeShell = HandlerUtil.getActiveShell(event);
 
diff --git a/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ConfigHelper.java b/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/DependencyAnalysisHelper.java
index cb9b42f6c1f..f3c79534e45 100644
--- a/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ConfigHelper.java
+++ b/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/DependencyAnalysisHelper.java
@@ -1,343 +1,405 @@
-/*****************************************************************************

- * Copyright (c) 2014 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

- *

- * Contributors:

- *  Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation

- *****************************************************************************/

-package org.eclipse.papyrus.migration.rsa.transformation;

-

-import java.util.Collection;

-import java.util.Set;

-

-import org.eclipse.emf.common.util.TreeIterator;

-import org.eclipse.emf.common.util.URI;

-import org.eclipse.emf.ecore.EObject;

-import org.eclipse.emf.ecore.EPackage;

-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.resource.impl.ResourceSetImpl;

-import org.eclipse.emf.ecore.util.EcoreUtil;

-import org.eclipse.emf.ecore.xmi.XMLResource;

-import org.eclipse.emf.ecore.xml.type.AnyType;

-import org.eclipse.papyrus.infra.emf.utils.EMFHelper;

-import org.eclipse.papyrus.migration.rsa.RSAToPapyrusParameters.Config;

-import org.eclipse.papyrus.migration.rsa.RSAToPapyrusParameters.RSAToPapyrusParametersFactory;

-import org.eclipse.papyrus.migration.rsa.RSAToPapyrusParameters.URIMapping;

-import org.eclipse.papyrus.uml.extensionpoints.library.IRegisteredLibrary;

-import org.eclipse.papyrus.uml.extensionpoints.library.RegisteredLibrary;

-import org.eclipse.papyrus.uml.extensionpoints.profile.IRegisteredProfile;

-import org.eclipse.papyrus.uml.extensionpoints.profile.RegisteredProfile;

-import org.eclipse.uml2.uml.Element;

-

-import com.google.common.collect.Sets;

-

-/**

- * Helper class to instantiate and manipulate a Parameters Configuration

- *

- * @author Camille Letavernier

- *

- */

-public class ConfigHelper {

-

-	protected final Config config;

-

-	protected final static Set<String> rsaExtensions = Sets.newHashSet("emx", "efx"); //$NON-NLS-1$ //$NON-NLS-2$

-

-	protected final static String rsaProfileExtension = "epx"; //$NON-NLS-1$

-

-	// ResourceSet used to load and explore Static Libraries

-	protected final ResourceSet localResourceSet = new ResourceSetImpl();

-

-	public ConfigHelper(Config config) {

-		this.config = config;

-		synchronized (config) {

-			if (config.getMappingParameters() == null) {

-				config.setMappingParameters(RSAToPapyrusParametersFactory.eINSTANCE.createMappingParameters());

-			}

-		}

-

-		configureResourceSet();

-	}

-

-	protected void configureResourceSet() {

-		localResourceSet.getLoadOptions().put(XMLResource.OPTION_DEFER_ATTACHMENT, true);

-		localResourceSet.getLoadOptions().put(XMLResource.OPTION_DEFER_IDREF_RESOLUTION, true);

-		localResourceSet.getLoadOptions().put(XMLResource.OPTION_RECORD_UNKNOWN_FEATURE, Boolean.TRUE);

-		localResourceSet.getLoadOptions().put(XMLResource.OPTION_USE_PACKAGE_NS_URI_AS_LOCATION, Boolean.FALSE);

-	}

-

-	protected void unloadResourceSet() {

-		EMFHelper.unload(localResourceSet);

-	}

-

-	public ConfigHelper() {

-		this(RSAToPapyrusParametersFactory.eINSTANCE.createConfig());

-	}

-

-	public Config getConfig() {

-		return config;

-	}

-

-	public void computeURIMappings(Collection<Resource> sourceModels) {

-		try {

-			for (Resource sourceModel : sourceModels) {

-				doComputeURIMappings(sourceModel);

-			}

-		} finally {

-			unloadResourceSet();

-		}

-	}

-

-	protected void doComputeURIMappings(Resource sourceModel) {

-		doComputeProfileURIMappings(sourceModel);

-

-		TreeIterator<EObject> resourceContents = sourceModel.getAllContents();

-		ResourceSet resourceSet = sourceModel.getResourceSet();

-

-		while (resourceContents.hasNext()) {

-			EObject next = resourceContents.next();

-			for (EReference reference : next.eClass().getEAllReferences()) {

-				if (reference.isContainer() || reference.isContainment() || reference.isDerived() || reference.isTransient()) {

-					continue;

-				}

-

-				Object value = next.eGet(reference);

-				if (value instanceof EObject) {

-					handleURIMapping((EObject) value, resourceSet);

-				} else if (value instanceof Collection<?>) {

-					for (Object element : (Collection<?>) value) {

-						if (element instanceof EObject) {

-							handleURIMapping((EObject) element, resourceSet);

-						}

-					}

-				}

-			}

-		}

-	}

-

-	protected void doComputeProfileURIMappings(Resource sourceModel) {

-		ResourceSet resourceSet = sourceModel.getResourceSet();

-

-		for (EObject rootObject : sourceModel.getContents()) {

-			if (isInvalidStereotypeApplication(rootObject)) {

-				handleProfileURIMapping(rootObject, resourceSet);

-			}

-		}

-	}

-

-	protected boolean isInvalidStereotypeApplication(EObject eObject) {

-		if (eObject instanceof Element) {

-			return false;

-		}

-

-		// The package is not resolved: probably a missing profile

-		if (eObject instanceof AnyType) {

-			return true;

-		}

-

-		// If the package is resolved but is contained in an EPX resource, it needs to be mapped to the Papyrus equivalent

-		EPackage ePackage = eObject.eClass().getEPackage();

-		if ("epx".equals(ePackage.eResource().getURI().fileExtension())) {

-			return true;

-		}

-

-		return false;

-	}

-

-	protected void handleProfileURIMapping(EObject stereotypeApplication, ResourceSet resourceSet) {

-		Collection<URIMapping> mappings = config.getMappingParameters().getProfileUriMappings();

-

-		URIMapping existingMapping = findExistingProfileMapping(stereotypeApplication, resourceSet);

-		if (existingMapping == null) {

-			URI packageURI = EcoreUtil.getURI(stereotypeApplication.eClass().getEPackage());

-

-			URIMapping mapping = RSAToPapyrusParametersFactory.eINSTANCE.createURIMapping();

-

-			mapping.setSourceURI(packageURI.trimFragment().trimQuery().toString());

-			mapping.setTargetURI(packageURI.trimFragment().trimQuery().toString());

-

-			synchronized (config) {

-				mappings.add(mapping);

-			}

-		} else {

-			synchronized (config) {

-				mappings.add(existingMapping);

-			}

-		}

-	}

-

-	protected void handleURIMapping(EObject eObject, ResourceSet resourceSet) {

-

-		Collection<URIMapping> mappings = config.getMappingParameters().getUriMappings();

-

-		if (eObject.eIsProxy() || isRSAModelElement(eObject)) { // Not yet resolved, or still a reference to an RSA Model Element

-			eObject = EcoreUtil.resolve(eObject, resourceSet);

-			if (eObject.eIsProxy() || isRSAModelElement(eObject)) { // Can't be resolved

-

-				URIMapping existingMapping = findExistingMapping(eObject, resourceSet);

-				if (existingMapping == null) {

-					URIMapping mapping = RSAToPapyrusParametersFactory.eINSTANCE.createURIMapping();

-					URI sourceURI = EcoreUtil.getURI(eObject);

-

-					mapping.setSourceURI(sourceURI.trimFragment().trimQuery().toString());

-					mapping.setTargetURI(sourceURI.trimFragment().trimQuery().toString()); // By default, don't change anything

-

-					synchronized (config) {

-						mappings.add(mapping);

-					}

-				} else {

-					synchronized (config) {

-						mappings.add(existingMapping);

-					}

-				}

-			}

-		}

-	}

-

-	protected boolean isRSAModelElement(EObject eObject) {

-		return isRSAModelElement(EcoreUtil.getURI(eObject));

-	}

-

-	protected boolean isRSAModelElement(URI objectURI) {

-		String fileExtension = objectURI.fileExtension();

-		return rsaExtensions.contains(fileExtension) || rsaProfileExtension.equals(fileExtension);

-	}

-

-	protected URIMapping findExistingProfileMapping(EObject stereotypeApplication, ResourceSet resourceSet) {

-		URI proxyURI = EcoreUtil.getURI(stereotypeApplication.eClass().getEPackage());

-		String fileExtension = proxyURI.fileExtension();

-

-		URIMapping mapping = RSAToPapyrusParametersFactory.eINSTANCE.createURIMapping();

-		URI sourceURI = proxyURI.trimFragment().trimQuery();

-		mapping.setSourceURI(sourceURI.toString());

-

-		URI targetURI = null;

-

-		if ("epx".equals(fileExtension)) {

-			targetURI = sourceURI.trimFileExtension().appendFileExtension("profile").appendFileExtension("uml");

-			try {

-				Resource resource = resourceSet.getResource(targetURI, true);

-				if (resource != null && !resource.getContents().isEmpty()) {

-					mapping.setTargetURI(targetURI.toString());

-					return mapping;

-				}

-			} catch (Exception ex) {

-				// Ignore: we can't find the target resource

-			}

-		}

-

-		return findExistingMapping(proxyURI, resourceSet);

-	}

-

-	protected URIMapping findExistingMapping(URI proxyURI, ResourceSet resourceSet) {

-		String fileExtension = proxyURI.fileExtension();

-

-		URIMapping mapping = RSAToPapyrusParametersFactory.eINSTANCE.createURIMapping();

-		mapping.setSourceURI(proxyURI.trimFragment().trimQuery().toString());

-

-		URI targetURI = null;

-		// Maybe the element has been migrated locally

-		if (rsaExtensions.contains(fileExtension)) {

-			targetURI = proxyURI.trimFileExtension().appendFileExtension("uml");

-		} else if (rsaProfileExtension.equals(fileExtension)) {

-			targetURI = proxyURI.trimFileExtension().appendFileExtension("profile.uml");

-		}

-

-		if (targetURI != null) {

-			try {

-				EObject targetElement = resourceSet.getEObject(targetURI, true);

-				if (targetElement != null) {

-

-					targetURI = EcoreUtil.getURI(targetElement);

-

-					mapping.setTargetURI(targetURI.trimFragment().trimQuery().toString());

-

-					return mapping;

-				}

-			} catch (Exception ex) {

-				// Ignore: we can't find a target element for the given proxy

-			}

-		}

-

-

-		if (!isRSAModelElement(proxyURI)) {

-			// Maybe the resource exists, but doesn't contain this specific element

-			URI resourceURI = proxyURI.trimFragment().trimQuery();

-			try {

-				Resource resource = resourceSet.getResource(resourceURI, true);

-				if (resource != null && !resource.getContents().isEmpty()) {

-

-					mapping.setTargetURI(resourceURI.toString());

-

-					return mapping;

-				}

-			} catch (Exception ex) {

-				// Ignore: we can't find the target resource

-			}

-		}

-

-		// If the URI fragment is a path, don't explore registered libraries/profiles: almost all libraries will

-		// have a matching element, although there is no specific correspondence

-		if (isPathFragment(proxyURI)) {

-			return null;

-		}

-

-		// Otherwise, we have an ID fragment

-

-		// Maybe the resource has already been migrated, then deployed as a static library. Browse all registered libraries and try to find a matching XMI ID

-		for (IRegisteredLibrary library : RegisteredLibrary.getRegisteredLibraries()) {

-			URI libraryURI = library.getUri();

-			try {

-				Resource libraryResource = localResourceSet.getResource(libraryURI, true);

-				if (libraryResource != null) {

-					EObject resolvedElement = libraryResource.getEObject(proxyURI.fragment());

-					if (resolvedElement != null && !resolvedElement.eIsProxy()) {

-						mapping.setTargetURI(libraryURI.toString());

-

-						return mapping;

-					}

-				}

-			} catch (Exception ex) {

-				// Ignore

-			}

-		}

-

-		// Maybe the object is a Profile, so let's browse registered profiles as well

-		for (IRegisteredProfile profile : RegisteredProfile.getRegisteredProfiles()) {

-			URI profileURI = profile.getUri();

-			try {

-				Resource profileResource = localResourceSet.getResource(profileURI, true);

-				if (profileResource != null) {

-					EObject resolvedElement = profileResource.getEObject(proxyURI.fragment());

-					if (resolvedElement != null && !resolvedElement.eIsProxy()) {

-						mapping.setTargetURI(profileURI.toString());

-

-						return mapping;

-					}

-				}

-			} catch (Exception ex) {

-				// Ignore

-			}

-		}

-

-		return null;

-	}

-

-	protected boolean isPathFragment(URI proxyURI) {

-		String uriFragment = proxyURI.fragment();

-

-		return uriFragment.charAt(0) == '/';

-	}

-

-	protected URIMapping findExistingMapping(EObject proxy, ResourceSet resourceSet) {

-		URI proxyURI = EcoreUtil.getURI(proxy);

-		return findExistingMapping(proxyURI, resourceSet);

-	}

-

-}

+/*****************************************************************************
+ * Copyright (c) 2015 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
+ *
+ * Contributors:
+ *  Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
+ *****************************************************************************/
+package org.eclipse.papyrus.migration.rsa.transformation;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import org.eclipse.emf.common.util.TreeIterator;
+import org.eclipse.emf.common.util.URI;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.EPackage;
+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.resource.impl.ResourceSetImpl;
+import org.eclipse.emf.ecore.util.EcoreUtil;
+import org.eclipse.emf.ecore.xmi.XMLResource;
+import org.eclipse.emf.ecore.xml.type.AnyType;
+import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
+import org.eclipse.papyrus.migration.rsa.RSAToPapyrusParameters.Config;
+import org.eclipse.papyrus.migration.rsa.RSAToPapyrusParameters.RSAToPapyrusParametersFactory;
+import org.eclipse.papyrus.migration.rsa.RSAToPapyrusParameters.URIMapping;
+import org.eclipse.papyrus.uml.extensionpoints.library.IRegisteredLibrary;
+import org.eclipse.papyrus.uml.extensionpoints.library.RegisteredLibrary;
+import org.eclipse.papyrus.uml.extensionpoints.profile.IRegisteredProfile;
+import org.eclipse.papyrus.uml.extensionpoints.profile.RegisteredProfile;
+import org.eclipse.uml2.uml.Element;
+
+import com.google.common.collect.Sets;
+
+public class DependencyAnalysisHelper {
+
+	protected final Config config;
+
+	protected final static Set<String> rsaExtensions = Sets.newHashSet("emx", "efx"); //$NON-NLS-1$ //$NON-NLS-2$
+
+	protected final static String rsaProfileExtension = "epx"; //$NON-NLS-1$
+
+	// ResourceSet used to load and explore Static Libraries
+	protected final ResourceSet localResourceSet = new ResourceSetImpl();
+
+	// Store the broken URIs without trying to resolve them. We don't have enough information to resolve them during the first phase of the model import
+	// The Key is the resource URI, the value is the Set of each individual EObject Fragment (We need the EObject fragments to find potential matches)
+	protected final Map<URI, Set<String>> brokenUris = new HashMap<URI, Set<String>>();
+
+	protected final Set<URI> brokenProfiles = new HashSet<URI>();
+
+	public DependencyAnalysisHelper(Config config) {
+		this.config = config;
+
+		configureResourceSet();
+	}
+
+	protected void configureResourceSet() {
+		localResourceSet.getLoadOptions().put(XMLResource.OPTION_DEFER_ATTACHMENT, true);
+		localResourceSet.getLoadOptions().put(XMLResource.OPTION_DEFER_IDREF_RESOLUTION, true);
+		localResourceSet.getLoadOptions().put(XMLResource.OPTION_RECORD_UNKNOWN_FEATURE, Boolean.TRUE);
+		localResourceSet.getLoadOptions().put(XMLResource.OPTION_USE_PACKAGE_NS_URI_AS_LOCATION, Boolean.FALSE);
+	}
+
+	protected void unloadResourceSet() {
+		EMFHelper.unload(localResourceSet);
+	}
+
+	public void computeURIMappings(Collection<Resource> sourceModels) {
+		for (Resource sourceModel : sourceModels) {
+			doComputeURIMappings(sourceModel);
+		}
+	}
+
+	public synchronized void resolveAllMappings() {
+		if (config.getMappingParameters() == null) {
+			config.setMappingParameters(RSAToPapyrusParametersFactory.eINSTANCE.createMappingParameters());
+		}
+
+		try {
+			for (Entry<URI, Set<String>> resourceToRepair : brokenUris.entrySet()) {
+				findMatch(resourceToRepair.getKey(), resourceToRepair.getValue());
+			}
+
+			for (URI profileDefinition : brokenProfiles) {
+				findMatch(profileDefinition);
+			}
+		} finally {
+			unloadResourceSet();
+		}
+	}
+
+	protected void findMatch(URI resourceURI, Set<String> fragments) {
+		for (String fragment : fragments) {
+			URI eObjectURI = resourceURI.appendFragment(fragment);
+			URIMapping mapping = findExistingMapping(eObjectURI, localResourceSet);
+			if (mapping != null) {
+				config.getMappingParameters().getUriMappings().add(mapping);
+				return;
+			}
+		}
+	}
+
+	protected void findMatch(URI profileDefinitionURI) {
+		URIMapping match = findExistingProfileMapping(profileDefinitionURI, localResourceSet);
+		if (match != null) {
+			config.getMappingParameters().getProfileUriMappings().add(match);
+		}
+	}
+
+	protected void doComputeURIMappings(Resource sourceModel) {
+		doComputeProfileURIMappings(sourceModel);
+
+		TreeIterator<EObject> resourceContents = sourceModel.getAllContents();
+		ResourceSet resourceSet = sourceModel.getResourceSet();
+
+		while (resourceContents.hasNext()) {
+			EObject next = resourceContents.next();
+			for (EReference reference : next.eClass().getEAllReferences()) {
+				if (reference.isContainer() || reference.isContainment() || reference.isDerived() || reference.isTransient()) {
+					continue;
+				}
+
+				Object value = next.eGet(reference);
+				if (value instanceof EObject) {
+					handleURIMapping((EObject) value, resourceSet);
+				} else if (value instanceof Collection<?>) {
+					for (Object element : (Collection<?>) value) {
+						if (element instanceof EObject) {
+							handleURIMapping((EObject) element, resourceSet);
+						}
+					}
+				}
+			}
+		}
+	}
+
+	protected void doComputeProfileURIMappings(Resource sourceModel) {
+		ResourceSet resourceSet = sourceModel.getResourceSet();
+
+		for (EObject rootObject : sourceModel.getContents()) {
+			if (isInvalidStereotypeApplication(rootObject)) {
+				handleProfileURIMapping(rootObject, resourceSet);
+			}
+		}
+	}
+
+	protected boolean isInvalidStereotypeApplication(EObject eObject) {
+		if (eObject instanceof Element) {
+			return false;
+		}
+
+		// The package is not resolved: probably a missing profile
+		if (eObject instanceof AnyType) {
+			return true;
+		}
+
+		// If the package is resolved but is contained in an EPX resource, it needs to be mapped to the Papyrus equivalent
+		EPackage ePackage = eObject.eClass().getEPackage();
+		if ("epx".equals(ePackage.eResource().getURI().fileExtension())) {
+			return true;
+		}
+
+		return false;
+	}
+
+	protected boolean isRSAModelElement(EObject eObject) {
+		return isRSAModelElement(EcoreUtil.getURI(eObject));
+	}
+
+	protected boolean isRSAModelElement(URI objectURI) {
+		String fileExtension = objectURI.fileExtension();
+		return rsaExtensions.contains(fileExtension) || rsaProfileExtension.equals(fileExtension);
+	}
+
+	protected synchronized Set<String> getFragments(URI resourceURI) {
+		if (!brokenUris.containsKey(resourceURI)) {
+			brokenUris.put(resourceURI, new HashSet<String>());
+		}
+
+		return brokenUris.get(resourceURI);
+	}
+
+	protected synchronized void handleBrokenReference(EObject proxy) {
+		URI proxyURI = EcoreUtil.getURI(proxy);
+		URI resourceURI = proxyURI.trimFragment().trimQuery();
+		String fragment = proxyURI.fragment();
+		Set<String> fragments = getFragments(resourceURI);
+		fragments.add(fragment);
+	}
+
+	protected synchronized void addBrokenProfileDefinition(URI packageURI) {
+		brokenProfiles.add(packageURI);
+	}
+
+
+	protected void handleProfileURIMapping(EObject stereotypeApplication, ResourceSet resourceSet) {
+
+		EPackage profileDefinition = stereotypeApplication.eClass().getEPackage();
+		URI packageURI = EcoreUtil.getURI(profileDefinition);
+		addBrokenProfileDefinition(packageURI);
+
+
+		// Collection<URIMapping> mappings = config.getMappingParameters().getProfileUriMappings();
+		//
+		// URIMapping existingMapping = findExistingProfileMapping(stereotypeApplication, resourceSet);
+		// if (existingMapping == null) {
+		// URI packageURI = EcoreUtil.getURI(stereotypeApplication.eClass().getEPackage());
+		//
+		// URIMapping mapping = RSAToPapyrusParametersFactory.eINSTANCE.createURIMapping();
+		//
+		// mapping.setSourceURI(packageURI.trimFragment().trimQuery().toString());
+		// mapping.setTargetURI(packageURI.trimFragment().trimQuery().toString());
+		//
+		// synchronized (config) {
+		// mappings.add(mapping);
+		// }
+		// } else {
+		// synchronized (config) {
+		// mappings.add(existingMapping);
+		// }
+		// }
+	}
+
+	protected void handleURIMapping(EObject eObject, ResourceSet resourceSet) {
+
+		if (isRSAModelElement(eObject)) {
+			handleBrokenReference(eObject);
+			return;
+		}
+
+		if (eObject.eIsProxy()) {
+			eObject = EcoreUtil.resolve(eObject, resourceSet);
+			if (eObject.eIsProxy()) {
+				handleBrokenReference(eObject);
+				return;
+			}
+		}
+
+		// Collection<URIMapping> mappings = config.getMappingParameters().getUriMappings();
+		//
+		// if (eObject.eIsProxy() || isRSAModelElement(eObject)) { // Not yet resolved, or still a reference to an RSA Model Element
+		// eObject = EcoreUtil.resolve(eObject, resourceSet);
+		// if (eObject.eIsProxy() || isRSAModelElement(eObject)) { // Can't be resolved
+		//
+		// URIMapping existingMapping = findExistingMapping(eObject, resourceSet);
+		// if (existingMapping == null) {
+		// URIMapping mapping = RSAToPapyrusParametersFactory.eINSTANCE.createURIMapping();
+		// URI sourceURI = EcoreUtil.getURI(eObject);
+		//
+		// mapping.setSourceURI(sourceURI.trimFragment().trimQuery().toString());
+		// mapping.setTargetURI(sourceURI.trimFragment().trimQuery().toString()); // By default, don't change anything
+		//
+		// synchronized (config) {
+		// mappings.add(mapping);
+		// }
+		// } else {
+		// synchronized (config) {
+		// mappings.add(existingMapping);
+		// }
+		// }
+		// }
+		// }
+	}
+
+	protected URIMapping findExistingProfileMapping(URI profileDefinitionURI, ResourceSet resourceSet) {
+
+		String fileExtension = profileDefinitionURI.fileExtension();
+
+		URIMapping mapping = RSAToPapyrusParametersFactory.eINSTANCE.createURIMapping();
+		URI sourceURI = profileDefinitionURI.trimFragment().trimQuery();
+		mapping.setSourceURI(sourceURI.toString());
+
+		URI targetURI = null;
+
+		if ("epx".equals(fileExtension)) {
+			targetURI = sourceURI.trimFileExtension().appendFileExtension("profile").appendFileExtension("uml");
+			try {
+				Resource resource = resourceSet.getResource(targetURI, true);
+				if (resource != null && !resource.getContents().isEmpty()) {
+					mapping.setTargetURI(targetURI.toString());
+					return mapping;
+				}
+			} catch (Exception ex) {
+				// Ignore: we can't find the target resource
+			}
+		}
+
+		return findExistingMapping(profileDefinitionURI, resourceSet);
+	}
+
+	protected URIMapping findExistingMapping(URI proxyURI, ResourceSet resourceSet) {
+		String fileExtension = proxyURI.fileExtension();
+
+		URIMapping mapping = RSAToPapyrusParametersFactory.eINSTANCE.createURIMapping();
+		mapping.setSourceURI(proxyURI.trimFragment().trimQuery().toString());
+
+		URI targetURI = null;
+		// Maybe the element has been migrated locally
+		if (rsaExtensions.contains(fileExtension)) {
+			targetURI = proxyURI.trimFileExtension().appendFileExtension("uml");
+		} else if (rsaProfileExtension.equals(fileExtension)) {
+			targetURI = proxyURI.trimFileExtension().appendFileExtension("profile.uml");
+		}
+
+		if (targetURI != null) {
+			try {
+				EObject targetElement = resourceSet.getEObject(targetURI, true);
+				if (targetElement != null) {
+
+					targetURI = EcoreUtil.getURI(targetElement);
+
+					mapping.setTargetURI(targetURI.trimFragment().trimQuery().toString());
+
+					return mapping;
+				}
+			} catch (Exception ex) {
+				// Ignore: we can't find a target element for the given proxy
+			}
+		}
+
+
+		if (!isRSAModelElement(proxyURI)) {
+			// Maybe the resource exists, but doesn't contain this specific element
+			URI resourceURI = proxyURI.trimFragment().trimQuery();
+			try {
+				Resource resource = resourceSet.getResource(resourceURI, true);
+				if (resource != null && !resource.getContents().isEmpty()) {
+
+					mapping.setTargetURI(resourceURI.toString());
+
+					return mapping;
+				}
+			} catch (Exception ex) {
+				// Ignore: we can't find the target resource
+			}
+		}
+
+		// If the URI fragment is a path, don't explore registered libraries/profiles: almost all libraries will
+		// have a matching element, although there is no specific correspondence
+		if (isPathFragment(proxyURI)) {
+			return null;
+		}
+
+		// Otherwise, we have an ID fragment
+
+		// Maybe the resource has already been migrated, then deployed as a static library. Browse all registered libraries and try to find a matching XMI ID
+		for (IRegisteredLibrary library : RegisteredLibrary.getRegisteredLibraries()) {
+			URI libraryURI = library.getUri();
+			try {
+				Resource libraryResource = localResourceSet.getResource(libraryURI, true);
+				if (libraryResource != null) {
+					EObject resolvedElement = libraryResource.getEObject(proxyURI.fragment());
+					if (resolvedElement != null && !resolvedElement.eIsProxy()) {
+						mapping.setTargetURI(libraryURI.toString());
+
+						return mapping;
+					}
+				}
+			} catch (Exception ex) {
+				// Ignore
+			}
+		}
+
+		// Maybe the object is a Profile, so let's browse registered profiles as well
+		for (IRegisteredProfile profile : RegisteredProfile.getRegisteredProfiles()) {
+			URI profileURI = profile.getUri();
+			try {
+				Resource profileResource = localResourceSet.getResource(profileURI, true);
+				if (profileResource != null) {
+					EObject resolvedElement = profileResource.getEObject(proxyURI.fragment());
+					if (resolvedElement != null && !resolvedElement.eIsProxy()) {
+						mapping.setTargetURI(profileURI.toString());
+
+						return mapping;
+					}
+				}
+			} catch (Exception ex) {
+				// Ignore
+			}
+		}
+
+		return null;
+	}
+
+	protected boolean isPathFragment(URI proxyURI) {
+		String uriFragment = proxyURI.fragment();
+
+		return uriFragment.charAt(0) == '/';
+	}
+
+	protected URIMapping findExistingMapping(EObject proxy, ResourceSet resourceSet) {
+		URI proxyURI = EcoreUtil.getURI(proxy);
+		return findExistingMapping(proxyURI, resourceSet);
+	}
+}
diff --git a/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ImportTransformation.java b/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ImportTransformation.java
index bf00217eb08..b0c1f46b6ff 100644
--- a/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ImportTransformation.java
+++ b/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ImportTransformation.java
@@ -142,6 +142,7 @@ public class ImportTransformation {
 	/** EPackages corresponding to source native profiles with specific support in the transformation */
 	protected static final Set<EPackage> sourceEPackages = new HashSet<EPackage>();
 
+	protected final DependencyAnalysisHelper analysisHelper;
 
 	static {
 		sourceEPackages.add(org.eclipse.papyrus.migration.rsa.default_.DefaultPackage.eINSTANCE);
@@ -150,13 +151,14 @@ public class ImportTransformation {
 	}
 
 	public ImportTransformation(URI sourceURI) {
-		this(sourceURI, RSAToPapyrusParametersFactory.eINSTANCE.createConfig());
+		this(sourceURI, RSAToPapyrusParametersFactory.eINSTANCE.createConfig(), null);
 	}
 
-	public ImportTransformation(URI sourceURI, Config config) {
+	public ImportTransformation(URI sourceURI, Config config, DependencyAnalysisHelper analysisHelper) {
 		Assert.isNotNull(sourceURI);
 		this.sourceURI = sourceURI;
 		this.parameters = config;
+		this.analysisHelper = analysisHelper;
 	}
 
 	public void run() {
@@ -578,8 +580,9 @@ public class ImportTransformation {
 	}
 
 	protected void handleDanglingURIs(Collection<Resource> resourcesToSave) {
-		ConfigHelper helper = new ConfigHelper(parameters);
-		helper.computeURIMappings(resourcesToSave);
+		if (analysisHelper != null) {
+			analysisHelper.computeURIMappings(resourcesToSave);
+		}
 	}
 
 	protected void unloadResourceSet(ResourceSet resourceSet) {
diff --git a/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ImportTransformationLauncher.java b/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ImportTransformationLauncher.java
index 6be59be28dc..2081db8d85e 100644
--- a/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ImportTransformationLauncher.java
+++ b/extraplugins/migration/org.eclipse.papyrus.migration.rsa/src/org/eclipse/papyrus/migration/rsa/transformation/ImportTransformationLauncher.java
@@ -108,6 +108,11 @@ public class ImportTransformationLauncher {
 	protected long ownRepairLibrariesTime;

 

 	/**

+	 * Own execution time for resolving all matches for broken profiles/libraries

+	 */

+	protected long resolveAllDependencies;

+

+	/**

 	 * The top-level job for this transformation

 	 */

 	protected Job importDependenciesJob;

@@ -118,6 +123,8 @@ public class ImportTransformationLauncher {
 	 */

 	protected long transformationsExecutionTime = 0L;

 

+	protected DependencyAnalysisHelper analysisHelper;

+

 	public ImportTransformationLauncher(Config config) {

 		this(config, null);

 	}

@@ -135,8 +142,10 @@ public class ImportTransformationLauncher {
 	public void run(List<URI> urisToImport) {

 		List<ImportTransformation> transformations = new LinkedList<ImportTransformation>();

 

+		analysisHelper = new DependencyAnalysisHelper(config);

+

 		for (URI uri : urisToImport) {

-			ImportTransformation transformation = new ImportTransformation(uri, config);

+			ImportTransformation transformation = new ImportTransformation(uri, config, analysisHelper);

 			transformations.add(transformation);

 		}

 

@@ -199,6 +208,7 @@ public class ImportTransformationLauncher {
 				log("\tTotal Transformation Time: " + timeFormat(transformationsExecutionTime));

 

 				log("Second phase (50-100%) / " + nbThreads + " Threads");

+				log("\tTotal Handle all Dangling References: " + timeFormat(resolveAllDependencies));

 				log("\tCumulated Loading Time: " + timeFormat(ownLoadingTime));

 				log("\tCumulated Fix Libraries Time: " + timeFormat(ownRepairLibrariesTime));

 				log("\tCumulated Fix Stereotypes Time: " + timeFormat(ownRepairStereotypesTime));

@@ -386,6 +396,11 @@ public class ImportTransformationLauncher {
 			profileUrisToReplace.putAll(transformation.getProfileURIMappings());

 		}

 

+		long startResolveAll = System.nanoTime();

+		analysisHelper.resolveAllMappings();

+		long endResolveAll = System.nanoTime();

+		resolveAllDependencies = endResolveAll - startResolveAll;

+

 		filterKnownMappings(config.getMappingParameters(), urisToReplace, profileUrisToReplace);

 

 		if (!config.getMappingParameters().getUriMappings().isEmpty() || !config.getMappingParameters().getProfileUriMappings().isEmpty()) {

diff --git a/tests/junit/extraplugins/migration/org.eclipse.papyrus.migration.rsa.tests/org.eclipse.papyrus.migration.rsa.tests.launch b/tests/junit/extraplugins/migration/org.eclipse.papyrus.migration.rsa.tests/org.eclipse.papyrus.migration.rsa.tests.launch
index 9ccdfb31e31..dc0c7a5baf3 100644
--- a/tests/junit/extraplugins/migration/org.eclipse.papyrus.migration.rsa.tests/org.eclipse.papyrus.migration.rsa.tests.launch
+++ b/tests/junit/extraplugins/migration/org.eclipse.papyrus.migration.rsa.tests/org.eclipse.papyrus.migration.rsa.tests.launch
@@ -23,7 +23,7 @@
 <booleanAttribute key="org.eclipse.jdt.junit.KEEPRUNNING_ATTR" value="false"/>

 <stringAttribute key="org.eclipse.jdt.junit.TESTNAME" value=""/>

 <stringAttribute key="org.eclipse.jdt.junit.TEST_KIND" value="org.eclipse.jdt.junit.loader.junit4"/>

-<stringAttribute key="org.eclipse.jdt.launching.JRE_CONTAINER" value="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>

+<stringAttribute key="org.eclipse.jdt.launching.JRE_CONTAINER" value="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>

 <stringAttribute key="org.eclipse.jdt.launching.MAIN_TYPE" value="org.eclipse.papyrus.migration.rsa.tests.AllTests"/>

 <stringAttribute key="org.eclipse.jdt.launching.PROGRAM_ARGUMENTS" value="-os ${target.os} -ws ${target.ws} -arch ${target.arch} -nl ${target.nl} -consoleLog"/>

 <stringAttribute key="org.eclipse.jdt.launching.PROJECT_ATTR" value="org.eclipse.papyrus.migration.rsa.tests"/>

diff --git a/tests/junit/extraplugins/migration/org.eclipse.papyrus.migration.rsa.tests/resources/parameters/TestParameters.emx b/tests/junit/extraplugins/migration/org.eclipse.papyrus.migration.rsa.tests/resources/parameters/TestParameters.emx
new file mode 100644
index 00000000000..92daa923958
--- /dev/null
+++ b/tests/junit/extraplugins/migration/org.eclipse.papyrus.migration.rsa.tests/resources/parameters/TestParameters.emx
@@ -0,0 +1,193 @@
+<?xml version="1.0" encoding="UTF-8"?>

+<!--xtools2_universal_type_manager-->

+<?com.ibm.xtools.emf.core.signature <signature id="com.ibm.xtools.uml.msl.model" version="7.0.0"><feature description="" name="com.ibm.xtools.ruml.feature" url="" version="7.0.0"/></signature>?>

+<?com.ibm.xtools.emf.core.signature <signature id="com.ibm.xtools.mmi.ui.signatures.diagram" version="7.0.0"><feature description="" name="Rational Modeling Platform (com.ibm.xtools.rmp)" url="" version="7.0.0"/></signature>?>

+<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:Default="http:///schemas/Default/_fNm3AAqoEd6-N_NOT9vsCA/2" xmlns:ecore="http://www.eclipse.org/emf/2002/Ecore" xmlns:notation="http://www.eclipse.org/gmf/runtime/1.0.2/notation" xmlns:uml="http://www.eclipse.org/uml2/3.0.0/UML" xmlns:umlnotation="http://www.ibm.com/xtools/1.5.3/Umlnotation" xsi:schemaLocation="http:///schemas/Default/_fNm3AAqoEd6-N_NOT9vsCA/2 pathmap://UML2_MSL_PROFILES/Default.epx#_fNwoAAqoEd6-N_NOT9vsCA?Default/Default?">

+  <uml:Model xmi:id="_78anwp_dEeSMStbbPSeZNQ" name="TestParameters">

+    <eAnnotations xmi:id="_78anw5_dEeSMStbbPSeZNQ" source="uml2.diagrams" references="_78anxJ_dEeSMStbbPSeZNQ">

+      <contents xmi:type="umlnotation:UMLDiagram" xmi:id="_78anxJ_dEeSMStbbPSeZNQ" type="Class" name="Main">

+        <children xmi:type="umlnotation:UMLShape" xmi:id="_8rc4AJ_dEeSMStbbPSeZNQ" element="_8rYmkJ_dEeSMStbbPSeZNQ" fontName="Segoe UI" fontHeight="8" transparency="0" lineColor="14263149" lineWidth="1" showStereotype="Label">

+          <children xmi:type="notation:DecorationNode" xmi:id="_8rdfEJ_dEeSMStbbPSeZNQ" type="ImageCompartment">

+            <layoutConstraint xmi:type="notation:Size" xmi:id="_8rdfEZ_dEeSMStbbPSeZNQ" width="1320" height="1320"/>

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+          <children xmi:type="notation:SemanticListCompartment" xmi:id="_8retMJ_dEeSMStbbPSeZNQ" visible="false" type="SignalCompartment"/>

+          <children xmi:type="umlnotation:UMLShapeCompartment" xmi:id="_8retMZ_dEeSMStbbPSeZNQ" visible="false" type="StructureCompartment"/>

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+        </children>

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+          <children xmi:type="notation:DecorationNode" xmi:id="_J31ZwJ_eEeSMStbbPSeZNQ" type="ImageCompartment">

+            <layoutConstraint xmi:type="notation:Size" xmi:id="_J31ZwZ_eEeSMStbbPSeZNQ" width="1320" height="1320"/>

+          </children>

+          <children xmi:type="notation:BasicDecorationNode" xmi:id="_J31Zwp_eEeSMStbbPSeZNQ" type="Stereotype"/>

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+          <children xmi:type="notation:BasicDecorationNode" xmi:id="_J31ZxJ_eEeSMStbbPSeZNQ" type="Parent"/>

+          <children xmi:type="notation:SemanticListCompartment" xmi:id="_J32A0J_eEeSMStbbPSeZNQ" type="AttributeCompartment"/>

+          <children xmi:type="notation:SemanticListCompartment" xmi:id="_J32A0Z_eEeSMStbbPSeZNQ" type="OperationCompartment"/>

+          <children xmi:type="notation:SemanticListCompartment" xmi:id="_J32A0p_eEeSMStbbPSeZNQ" visible="false" type="SignalCompartment"/>

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+        </children>

+      </contents>

+    </eAnnotations>

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