fix wrong check leading to subscription not being applied (#795)

* fix wrong check leading to subscription not being applied

* fix missing preserveRetain default

hivemq-edge/src/main/java/com/hivemq/api/resources/impl/BridgeResourceImpl.java

@@ -494,13 +494,13 @@ private static void sanitize(final @NotNull Bridge bridge) {
             bridge.setSessionExpiry(3600L);
         }
 
-        if (bridge.getLocalSubscriptions() != null) {
+        if (bridge.getLocalSubscriptions() == null) {
             bridge.setLocalSubscriptions(List.of());
         }
 
         bridge.getLocalSubscriptions().forEach(BridgeResourceImpl::sanitize);
 
-        if (bridge.getRemoteSubscriptions() != null) {
+        if (bridge.getRemoteSubscriptions() == null) {
            bridge.setRemoteSubscriptions(List.of());
         }
 
@@ -543,6 +543,10 @@ private static void sanitize(final @NotNull LocalBridgeSubscription localBridgeS
             localBridgeSubscription.setFilters(List.of());
         }
 
+        if (localBridgeSubscription.getPreserveRetain() == null) {
+            localBridgeSubscription.setPreserveRetain(false);
+        }
+
     }
 
     private static void sanitize(final @NotNull BridgeSubscription bridgeSubscription) {
@@ -553,5 +557,9 @@ private static void sanitize(final @NotNull BridgeSubscription bridgeSubscriptio
         if (bridgeSubscription.getFilters() == null) {
             bridgeSubscription.setFilters(List.of());
         }
+
+        if (bridgeSubscription.getPreserveRetain() == null) {
+            bridgeSubscription.setPreserveRetain(false);
+        }
     }
 }