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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
*
* Contributors:
* Arnaud Cuccuru (CEA LIST) - Initial API and implementation
* Vincent Lorenzo (CEA LIST)
* Benoit Maggi (CEA LIST) - Bug 431629 Patch to avoid loop on imported packages
*****************************************************************************/
package org.eclipse.papyrus.uml.tools.utils;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.uml2.uml.Model;
import org.eclipse.uml2.uml.NamedElement;
import org.eclipse.uml2.uml.Namespace;
import org.eclipse.uml2.uml.resource.UMLResource;
public class NameResolutionHelper {
protected Namespace scope;
protected EClass filter;
protected Map<String, List<NamedElement>> allNames;
public NameResolutionHelper(Namespace scope, EClass filter) {
this.scope = scope;
this.filter = filter;
}
public List<NamedElement> getNamedElements(String name) {
if (this.allNames == null) {
this.allNames = new HashMap<String, List<NamedElement>>();
this.computeAllNames();
}
List<NamedElement> namedElements = this.allNames.get(name);
return namedElements != null ? namedElements : new ArrayList<NamedElement>();
}
/**
* TODO
*/
protected void computeAllNames() {
// compute names directly available in the scope
computeNames("", scope, true);
// compute names related to enclosing namepaces of scope
Namespace enclosingNamespace = scope.getNamespace();
String prefix = "";
while (enclosingNamespace != null) {
// prefix += enclosingNamespace.getName() + NamedElementUtil.QUALIFIED_NAME_SEPARATOR;
prefix = "";
computeNames(prefix, enclosingNamespace, false);
enclosingNamespace = enclosingNamespace.getNamespace();
}
// Compute names related to the root context model
Namespace model = scope.getModel();
if (model == null) {
model = scope;
}
if (filter != null) {
if (filter.isSuperTypeOf(model.eClass())) {
List<NamedElement> l = this.allNames.get(model.getName());
if (l == null) { // i.e. no names have already been resolved in enclosed namespaces
l = new ArrayList<NamedElement>();
l.add(model);
this.allNames.put(model.getName(), l);
}
}
} else {
List<NamedElement> l = this.allNames.get(model.getName());
if (l == null) { // i.e. no names have already been resolved in enclosed namespaces
l = new ArrayList<NamedElement>();
l.add(model);
this.allNames.put(model.getName(), l);
}
}
computeNames(model.getName() + NamedElementUtil.QUALIFIED_NAME_SEPARATOR, model, false);
// Build names corresponding to other available UML resources in the workspace
List<Resource> resources = new ArrayList<Resource>(scope.eResource().getResourceSet().getResources());// we duplicate the resource to avoid concurrent modification
for (Resource resource : resources) {
if (resource != scope.eResource() && resource instanceof UMLResource) {
UMLResource umlResource = (UMLResource) resource;
Model root = null;
for (Iterator<EObject> i = umlResource.getAllContents(); i.hasNext() && root == null;) {
EObject next = i.next();
if (next instanceof Model) {
root = (Model) next;
}
}
if (root != null) {
if (filter != null) {
if (filter.isSuperTypeOf(root.eClass())) {
List<NamedElement> l = this.allNames.get(root.getName());
if (l == null) { // i.e. no names have already been resolved in enclosed namespaces
l = new ArrayList<NamedElement>();
l.add(root);
this.allNames.put(root.getName(), l);
}
}
} else {
List<NamedElement> l = this.allNames.get(root.getName());
if (l == null) { // i.e. no names have already been resolved in enclosed namespaces
l = new ArrayList<NamedElement>();
l.add(root);
this.allNames.put(root.getName(), l);
}
}
computeNames(root.getName() + NamedElementUtil.QUALIFIED_NAME_SEPARATOR, root, false);
}
}
}
}
/**
* TODO
*/
protected void computeNames(String prefix, Namespace scope, boolean ignoreAlreadyFoundNames) {
computeNames(prefix, scope, ignoreAlreadyFoundNames, new HashSet<Namespace>());
}
/**
*
* @param prefix
* @param scope
* @param ignoreAlreadyFoundNames
* @param alreadyComputedNamespace
* list of already visited Namespace to avoid loop on imported packages
*/
protected void computeNames(String prefix, Namespace scope, boolean ignoreAlreadyFoundNames, Set<Namespace> alreadyComputedNamespace) {
alreadyComputedNamespace.add(scope);
Set<String> preExistingKeys;
if (ignoreAlreadyFoundNames) {
preExistingKeys = new HashSet<String>();
} else {
preExistingKeys = this.allNames.keySet();
}
// iterates members of the scope
for (NamedElement member : scope.getMembers()) {
List<String> memberNames = scope.getNamesOfMember(member);
// iterates other names given to the current member in the context of this scope
for (String memberName : memberNames) {
// Checks if the name must be considered or not
if (!preExistingKeys.contains(prefix + memberName)) {
List<NamedElement> l = this.getNamedElements(prefix + memberName);
l.add(member);
this.allNames.put(prefix + memberName, l);
}
if (member instanceof Namespace && !alreadyComputedNamespace.contains(member)) { // avoid loop on imported packages
// Recursive call on the current member
computeNames(prefix + memberName + NamedElementUtil.QUALIFIED_NAME_SEPARATOR, (Namespace) member, false, alreadyComputedNamespace);
}
}
}
}
}
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