avoid NPE when the value is UNKNOWN

lfoppiano · Dec 12, 2022 · 9d7a7c4 · 9d7a7c4
1 parent c2b4a34
commit 9d7a7c4
Showing 1 changed file with 12 additions and 9 deletions.
diff --git a/src/main/java/org/grobid/core/data/ValueBlock.java b/src/main/java/org/grobid/core/data/ValueBlock.java
@@ -219,15 +219,18 @@ public String toJson() {
             json.append(", ");
 
 
-        byte[] encodedRawName = encoder.quoteAsUTF8(toString());
-        String outputRawName = new String(encodedRawName);
-        if (!started) {
-            started = true;
-        } else
-            json.append(", ");
-        json.append("\"formatted\" : \"" + outputRawName + "\"");
-
-        json.append(" }");
+        String valueAsString = toString();
+        if (valueAsString != null) {
+            byte[] encodedRawName = encoder.quoteAsUTF8(valueAsString);
+            String outputRawName = new String(encodedRawName);
+            if (!started) {
+                started = true;
+            } else
+                json.append(", ");
+            json.append("\"formatted\" : \"" + outputRawName + "\"");
+
+            json.append(" }");
+        }
         return json.toString();
     }