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Copyright (c) 2010 itemis AG ( 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 /
 package org.eclipse.xtext.ui.editor.findrefs;
import  org.eclipse.core.resources.IProject;
import  org.eclipse.core.resources.IStorage;

Jan Koehnlein - Initial contribution and API
	public <R> R readOnly(URI targetURIIUnitOfWork<R, ResourceSetwork) {
		Iterable<Pair<IStorage, IProject>> storages = .getStorages(targetURI.trimFragment());
		Iterator<Pair<IStorage, IProject>> iterator = storages.iterator();
		while(iterator.hasNext()) {
			Pair<IStorage, IProject> pair =;
			IProject project = pair.getSecond();
			if (project != null) {
				ResourceSet resourceSet = .get(project);
				if(resourceSet != null)
					try {
						return work.exec(resourceSet);
catch (Exception e) {
						throw new WrappedException(e);
		return null;
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