Fix element order in data-service fault messages

Fix element ordeing in data-service fault messages to match the WSDL definition.
Fixes wso2/product-ei/issues/4664

components/data/data-services/org.wso2.micro.integrator.dataservices.core/src/main/java/org/wso2/micro/integrator/dataservices/core/DataServiceFault.java

@@ -18,6 +18,7 @@
 package org.wso2.micro.integrator.dataservices.core;
 
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Set;
 
@@ -91,7 +92,19 @@ public static OMElement extractFaultMessage(Throwable throwable) {
  OMElement root = fac.createOMElement(new QName(
  DBConstants.WSO2_DS_NAMESPACE, DBConstants.DS_FAULT_ELEMENT));
  OMNamespace ns = root.getNamespace();
- for (Map.Entry<String, Object> rootEntry : ((DataServiceFault) throwable).getPropertyMap().entrySet()) {
+ // Adding data from HashMap to a LikedHashMap to preserve the order
+ Map<String, Object> propLinkedHashMap = new LinkedHashMap<>();
+ propLinkedHashMap.put(DBConstants.FaultParams.CURRENT_PARAMS,
+ ((DataServiceFault) throwable).getPropertyMap().get(DBConstants.FaultParams.CURRENT_PARAMS));
+ propLinkedHashMap.put(DBConstants.FaultParams.CURRENT_REQUEST_NAME,
+ ((DataServiceFault) throwable).getPropertyMap().get(DBConstants.FaultParams.CURRENT_REQUEST_NAME));
+ propLinkedHashMap.put(DBConstants.FaultParams.NESTED_EXCEPTION,
+ ((DataServiceFault) throwable).getPropertyMap().get(DBConstants.FaultParams.NESTED_EXCEPTION));
+ propLinkedHashMap.put(DBConstants.FaultParams.SOURCE_DATA_SERVICE,
+ ((DataServiceFault) throwable).getPropertyMap().get(DBConstants.FaultParams.SOURCE_DATA_SERVICE));
+ propLinkedHashMap.put(DBConstants.FaultParams.DS_CODE,
+ ((DataServiceFault) throwable).getPropertyMap().get(DBConstants.FaultParams.DS_CODE));
+ for (Map.Entry<String, Object> rootEntry : propLinkedHashMap.entrySet()) {
  OMElement keyElement = fac.createOMElement(rootEntry.getKey(), ns);
  if (rootEntry.getValue() instanceof Map) {
  for (Map.Entry dataServiceEntry : (Set<Map.Entry>) ((Map) rootEntry.getValue()).entrySet()) {