initialized items set

11 months ago · b16c8b6b34
1 changed files with 2 additions and 1 deletions
--- a/application/src/main/java/org/thingsboard/server/service/cf/ctx/state/aggregation/function/CountUniqueAggEntry.java
+++ b/application/src/main/java/org/thingsboard/server/service/cf/ctx/state/aggregation/function/CountUniqueAggEntry.java
@ -17,12 +17,13 @@ package org.thingsboard.server.service.cf.ctx.state.aggregation.function;

 import org.thingsboard.server.common.data.cf.configuration.aggregation.AggFunction;

+import java.util.HashSet;
 import java.util.Optional;
 import java.util.Set;

 public class CountUniqueAggEntry implements AggEntry {

-    private Set<String> items;
+    private final Set<String> items = new HashSet<>();

    @Override
    public void update(Object value) {