Return xml inside JSON status (#8580)

Co-authored-by: WANGF <[email protected]>

services/src/main/java/org/fao/geonet/api/records/MetadataWorkflowApi.java

@@ -66,6 +66,8 @@
 import org.jdom.Element;
 import org.jdom.input.JDOMParseException;
 import org.jdom.output.XMLOutputter;
+import org.json.JSONException;
+import org.json.JSONObject;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.ApplicationContext;
 import org.springframework.data.domain.PageRequest;
@@ -1259,9 +1261,29 @@ private String getValidatedStateText(MetadataStatus metadataStatus, State state,
             checkCanViewStatus(stateText, httpSession);
         }
 
+        if (isValidJSON(stateText)) {
+            JSONObject json = new JSONObject(stateText);
+            String xmlRecord = json.getString("xmlRecord");
+            return xmlRecord;
+        }
+
         return stateText;
     }
 
+    /**
+     * Check if the input string is valid JSON format string
+     * @param json input string
+     * @return boolean if string is JSON format
+     */
+    private boolean isValidJSON(String json) {
+        try {
+            new JSONObject(json);
+        } catch (JSONException e) {
+            return false;
+        }
+        return true;
+    }
+
     /**
      * Checks if the metadata workflow is enabled.
      *