Support complex types in artifact properties

Adds support to complex types in artifact properties of an interface
operation implementation.

Change-Id: I7a82a3652541b35230fe4ce87bf703a1dbe72d50
Issue-ID: SDC-3899
Signed-off-by: andre.schmid <andre.schmid@est.tech>

1 files changed, 7 insertions, 0 deletions

diff --git a/common-app-api/src/main/java/org/openecomp/sdc/common/util/JsonUtils.java b/common-app-api/src/main/java/org/openecomp/sdc/common/util/JsonUtils.java
index be534d2909..c76310ecf4 100644
--- a/common-app-api/src/main/java/org/openecomp/sdc/common/util/JsonUtils.java
+++ b/common-app-api/src/main/java/org/openecomp/sdc/common/util/JsonUtils.java
@@ -24,6 +24,10 @@ import com.google.gson.JsonObject;
 
 public class JsonUtils {
 
+    private JsonUtils() {
+
+    }
+
     public static String toString(JsonElement jsonElement) {
         if (jsonElement == null) {
             return null;
@@ -48,6 +52,9 @@ public class JsonUtils {
     }
 
     public static boolean isEmptyJson(final JsonElement json) {
+        if (json == null || json.isJsonNull()) {
+            return true;
+        }
         if (json.isJsonArray()) {
             return json.getAsJsonArray().isEmpty();
         }