Fix issue with xml export of autocomplete and multiautocomplete fields

dmp-backend/web/src/main/java/eu/eudat/logic/utilities/documents/xml/ExportXmlBuilder.java

 package eu.eudat.logic.utilities.documents.xml;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.exc.MismatchedInputException;
 import eu.eudat.logic.services.forms.VisibilityRuleService;
 import eu.eudat.logic.utilities.builders.XmlBuilder;
 import eu.eudat.models.data.components.commons.datafield.ExternalDatasetsData;
@@ -19,6 +21,7 @@ import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.util.List;
+import java.util.Map;
 import java.util.UUID;
 
 public class ExportXmlBuilder {
@@ -98,16 +101,33 @@ public class ExportXmlBuilder {
                 }
                 if (field.getValue() != null) {
                     Element valueField = element.createElement("value");
+                    ObjectMapper mapper = new ObjectMapper();
                     try {
-                        JSONArray jsonArray = new JSONArray(field.getValue().toString());
+
+                        List<Map<String, Object>> jsonArray = mapper.readValue(field.getValue().toString(), List.class);
+//                        JSONArray jsonArray = new JSONArray(field.getValue().toString());
                         StringBuilder sb = new StringBuilder();
-                        for (int i = 0; i < jsonArray.length(); i++) {
+                        boolean firstTime = true;
+                        for (Map<String, Object> jsonElement: jsonArray) {
+                            if (!firstTime) {
+                                sb.append(", ");
+                            }
+                            sb.append(jsonElement.get("label") != null ? jsonElement.get("label") : jsonElement.get("name"));
+                            firstTime = false;
+
+                        }
+                        /*for (int i = 0; i < jsonArray.length(); i++) {
                             sb.append(jsonArray.getJSONObject(i).get("label").toString());
                             if (i != jsonArray.length() - 1) sb.append(", ");
-                        }
+                        }*/
                         valueField.setTextContent(sb.toString());
-                    } catch (JSONException ex) {
-                        valueField.setTextContent(field.getValue().toString());
+                    } catch (IOException ex) {
+                        try {
+                            Map<String, Object> jsonElement = mapper.readValue(field.getValue().toString(), Map.class);
+                            valueField.setTextContent((jsonElement.get("label") != null ? jsonElement.get("label").toString() : jsonElement.get("name").toString()));
+                        } catch (IOException e) {
+                            valueField.setTextContent(field.getValue().toString());
+                        }
                     }
                     elementField.appendChild(valueField);
                 }