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/*******************************************************************************
* Copyright (c) 2009, 2013 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.e4.ui.internal.workbench;
import java.util.HashSet;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.WeakHashMap;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.ecore.xmi.impl.XMIResourceImpl;
public class E4XMIResource extends XMIResourceImpl {
private Map<EObject, String> objectMap = new WeakHashMap<EObject, String>();
private Set<String> knownIds = new HashSet<String>();
public E4XMIResource() {
}
public E4XMIResource(URI uri) {
super(uri);
}
public void setInternalId(EObject object, String id) {
objectMap.put(object, id);
knownIds.add(id);
}
public String getInternalId(EObject object) {
return objectMap.get(object);
}
@Override
protected boolean useIDs() {
return true;
}
private String createId() {
return EcoreUtil.generateUUID();
}
private String getUniqueId() {
String id = createId();
while (knownIds.contains(id)) {
id = createId();
}
return id;
}
@Override
public void setID(EObject eObject, String id) {
if (id != null) {
String internalId = objectMap.get(eObject);
if (internalId != null) {
super.setID(eObject, internalId);
}
objectMap.put(eObject, id);
knownIds.add(id);
}
super.setID(eObject, id);
}
@Override
public String getID(EObject eObject) {
if (eObject instanceof Entry<?, ?>) {
return null;
}
String id = super.getID(eObject);
if (id != null) {
return id;
}
id = objectMap.get(eObject);
if (id != null) {
return id;
}
id = getUniqueId();
setID(eObject, id);
return id;
}
}
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