src/main/java/ru/ulstu/extractor/rule/service/FuzzyInferenceService.java

@@ -19,6 +19,7 @@ import ru.ulstu.extractor.rule.model.DbRule;
 import ru.ulstu.extractor.ts.model.TimeSeries;
 import ru.ulstu.extractor.ts.service.TimeSeriesService;
 
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -31,6 +32,7 @@ public class FuzzyInferenceService {
     private final static String RULE_TEMPLATE = "if %s is %s and %s is %s then "
             + OUTPUT_VARIABLE_NAME
             + " is %s";
+    private final static String NO_RESULT = "Нет результата";
     private final DbRuleService ruleService;
     private final AntecedentValueService antecedentValueService;
     private final GitRepositoryService gitRepositoryService;
@@ -130,6 +132,9 @@ public class FuzzyInferenceService {
         List<Integer> consequentValues = dbRules.stream().map(DbRule::getId).collect(Collectors.toList());
         engine.addRuleBlock(getRuleBlock(engine, variableValues, antecedentValues, consequentValues));
         String consequent = getConsequent(engine, variableValues);
+        if (consequent.equals(NO_RESULT)) {
+            return new ArrayList<>();
+        }
         return dbRules
                 .stream()
                 .filter(r -> r.getId().equals(Integer.valueOf(consequent)))
@@ -173,7 +178,7 @@ public class FuzzyInferenceService {
             outputVariable.defuzzify();
         }
         return (outputVariable == null || Double.isNaN(outputVariable.getValue()))
-                ? "Нет результата"
+                ? NO_RESULT
                 : outputVariable.highestMembership(outputVariable.getValue()).getSecond().getName();
     }
 }

src/main/resources/templates/assessments.html

@@ -34,7 +34,7 @@
 
         <input type="hidden" th:field="*{branchId}">
     </form>
-    <div th:if="${assessments  != null}">
+    <div th:if="${assessments != null && #lists.size(assessments) > 0}">
         <h5>Состояние репозитория описывается следующими выражениями:</h5>
         <div th:each="assessment: ${assessments}">
             <span th:text="${assessment.consequent}"></span>
@@ -44,5 +44,8 @@
                 th:text="${assessment.secondAntecedent.description}"></span>';
         </div>
     </div>
+    <div th:if="${assessments != null && #lists.size(assessments) == 0}">
+        <h5>Нет результатов</h5>
+    </div>
 </div>
 </html>