Add some speed for equivalent verifier (no check of one char words)

dmnverifierapi/src/main/java/de/unikoblenz/fgbks/core/dmn/verification/verifier/impl/EquivalentVerifier.java

@@ -68,19 +68,21 @@ public class EquivalentVerifier extends AbstractVerifier {
       VDmnValue v1, VDmnValue v2, List<String> stringVals, List<String> stringValsInner) {
     for (int i = 0; i < stringVals.size(); i++) {
       for (int u = 0; u < stringValsInner.size(); u++) {
-        if (wordnetService.areNounsSynonyms(stringVals.get(i), stringValsInner.get(u))) {
-          vreFactory.addElement(VerificationResultEntryElement.create(v1));
-          vreFactory.addElement(VerificationResultEntryElement.create(v2));
-          vreFactory.addVerificationFix(
-              v1.isInputValue() ? SHOW_INPUT_ENTRIES : SHOW_OUTPUT_ENTRIES);
-          vreFactory.addToEntry(
-              VerificationClassification.WARNING,
-              templateDecisionColumn(v1.getVDmnColumn())
-                  + "String values \"%s\" (Row %s) and \"%s\" (Row %s) might be equivalent.",
-              stringVals.get(i),
-              v1.getVDmnRule().getRowNumber().toString(),
-              stringValsInner.get(u),
-              v2.getVDmnRule().getRowNumber().toString());
+        if (stringVals.get(i).length() > 1 && stringValsInner.get(u).length() > 1) {
+          if (wordnetService.areNounsSynonyms(stringVals.get(i), stringValsInner.get(u))) {
+            vreFactory.addElement(VerificationResultEntryElement.create(v1));
+            vreFactory.addElement(VerificationResultEntryElement.create(v2));
+            vreFactory.addVerificationFix(
+                v1.isInputValue() ? SHOW_INPUT_ENTRIES : SHOW_OUTPUT_ENTRIES);
+            vreFactory.addToEntry(
+                VerificationClassification.WARNING,
+                templateDecisionColumn(v1.getVDmnColumn())
+                    + "String values \"%s\" (Row %s) and \"%s\" (Row %s) might be equivalent.",
+                stringVals.get(i),
+                v1.getVDmnRule().getRowNumber().toString(),
+                stringValsInner.get(u),
+                v2.getVDmnRule().getRowNumber().toString());
+          }
         }
       }
     }