Fix empty names = no names

dmnverifierapi/src/main/java/de/unikoblenz/fgbks/core/dmn/domain/vdmn/parser/SimpleVDmnParser.java

@@ -99,7 +99,7 @@ public class SimpleVDmnParser implements DmnModelInstanceWrapper {
       VDmnDecisionImpl.Builder decisionBuilder = VDmnDecisionImpl.getBuilder().withDecisionId(id);
       decisionBuilderMap.put(id, decisionBuilder);
       // Add name, if present
-      if (decision.getName() != null) {
+      if (decision.getName() != null && !decision.getName().isEmpty()) {
         decisionBuilder.withName(decision.getName());
       }
       // Add DmnDecisionBuilder to definitionBuilder
@@ -132,11 +132,12 @@ public class SimpleVDmnParser implements DmnModelInstanceWrapper {
               .withInputExpressionId(new InputExpressionId(inputCol.getInputExpression().getId()))
               .withTypeRef(type);
       // name
-      if (inputCol.getInputExpression().getText() != null) {
+      if (inputCol.getInputExpression().getText() != null
+          && !inputCol.getInputExpression().getText().getTextContent().isEmpty()) {
         builder.withName(inputCol.getInputExpression().getText().getTextContent());
       }
       // label
-      if (inputCol.getLabel() != null) {
+      if (inputCol.getLabel() != null && !inputCol.getLabel().isEmpty()) {
         builder.withLabel(inputCol.getLabel());
       }
       // Add Builder to builder list
@@ -162,11 +163,11 @@ public class SimpleVDmnParser implements DmnModelInstanceWrapper {
               .withOutputId(new OutputId(outputCol.getId()))
               .withTypeRef(VTypeRef.getTypeRefFromName(outputCol.getTypeRef()));
       // name
-      if (outputCol.getName() != null) {
+      if (outputCol.getName() != null && !outputCol.getName().isEmpty()) {
         builder.withName(outputCol.getName());
       }
       // label
-      if (outputCol.getLabel() != null) {
+      if (outputCol.getLabel() != null && !outputCol.getLabel().isEmpty()) {
         builder.withLabel(outputCol.getLabel());
       }
       // Add Builder to builder list