Changed DoF cross product helper access to static

core/tools.descartes.dql.core.engine/src/tools/descartes/dql/core/engine/util/DoFCrossProductHelper.java

@@ -50,10 +50,10 @@ public class DoFCrossProductHelper {
 	 * @return List of DoF-combination. Each list element contains one possible
 	 *         combination
 	 */
-	public List<HashMap<DoF, String>> calculateCrossProduct(EntityMapping input) {
-		this.possibleDofValues = getPossibleDofValues(input);
-		List<HashMap<DoF, String>> result = recursiveCrossProduct();
-
+	public static List<HashMap<DoF, String>> calculateCrossProduct(EntityMapping input) {
+		DoFCrossProductHelper helper = new DoFCrossProductHelper();
+		helper.possibleDofValues = helper.getPossibleDofValues(input);
+		List<HashMap<DoF, String>> result = helper.recursiveCrossProduct();
 		return result;
 	}