check is more readable now. contains vs. indexOf

src/main/java/org/gesis/dda/filter/impl/Doabooks2SsoarBundleFilter.java

@@ -42,7 +42,7 @@ public class Doabooks2SsoarBundleFilter implements BundleFilter {
                 && null != licence) {
             LOG.debug("clasShort-Set not null and a licence entry is found");
         if (clasShorts.stream().filter(cls -> Arrays.asList(valuesToBeFilteredTo).contains(cls.getValue())).count() > 0) {
-            if (Arrays.asList(licenceStringsToBeFilteredTo).stream().anyMatch( str -> licence.getValue().indexOf(str) != -1)) {
+            if (Arrays.asList(licenceStringsToBeFilteredTo).stream().anyMatch( str -> licence.getValue().contains(str))) {
                 result = true;
                 LOG.debug("We take it: {}", clasShorts.stream().map(Metadatum::getValue).collect(Collectors.joining("; ")));
             } else {