private static QueryContext getQueryContext(final ResourceSet rs) {
		return new QueryContext() {

			public URI[] getResourceScope() {
				final List<URI> result = new ArrayList<URI>();
				index.executeQueryCommand(new QueryCommand() {
					public void execute(QueryExecutor queryExecutor) {
						ResourceQuery<ResourceDescriptor> resourceQuery = IndexQueryFactory.createResourceQuery();
						for (ResourceDescriptor desc : queryExecutor.execute(resourceQuery)) {
							result.add(desc.getURI());
						}
					}
				});
				return result.toArray(new URI[0]);
			}
			public ResourceSet getResourceSet() {
				return rs;
			}
		};
	}

	public QueryContext createQueryContext(final ResourceSet resourceSet, final URI... useURIs) {
		return new QueryContext() {
			@Override
			public URI[] getResourceScope() {
				URI[] result = new URI[useURIs.length];
				for (int x = 0; x < useURIs.length; x++) {
					result[x] = normalizer.normalize(useURIs[x]);
				}
				return result;
			}
			@Override
			public ResourceSet getResourceSet() {
				return resourceSet;
			}
		};
	}

	public QueryContext createQueryContextAll(final ResourceSet resourceSet) {
		return new QueryContext() {
			@Override
			public URI[] getResourceScope() {
				return indexedURIs.toArray(new URI[indexedURIs.size()]);
			}
			@Override
			public ResourceSet getResourceSet() {
				return resourceSet;
			}
		};
	}