SMHE-1748 SF jasper to shared

fix sonar issue npe

Signed-off-by: Natasja Nortier <natasja.nortier@alliander.com>

Author: natasja-n

osgp/protocol-adapter-dlms/osgp-jasper-interface/src/main/java/org/opensmartgridplatform/adapter/protocol/jasper/rest/client/JasperWirelessTerminalRestClient.java

@@ -54,7 +54,10 @@ public GetSessionInfoResponse getSession(final String iccId) throws OsgpJasperEx
           this.jasperwirelessRestTemplate.exchange(
               url, HttpMethod.GET, entity, GetSessionInfoResponse.class);
 
-      getSessionInfoResponse = this.checkOnSessionValidity(getSessionInfoResponseEntity);
+      if (getSessionInfoResponseEntity.getBody() != null) {
+        getSessionInfoResponse =
+            this.checkOnSessionValidity(getSessionInfoResponseEntity.getBody());
+      }
 
     } catch (final HttpClientErrorException | HttpServerErrorException e) {
       this.handleException(e);
@@ -65,15 +68,14 @@ public GetSessionInfoResponse getSession(final String iccId) throws OsgpJasperEx
   }
 
   private GetSessionInfoResponse checkOnSessionValidity(
-      final ResponseEntity<GetSessionInfoResponse> getSessionInfoResponseEntity) {
+      final GetSessionInfoResponse getSessionInfoResponse) {
     // To simulated to same behaviour as the SOAP interface. Session info of an expired session is
     // removed form the response.
     // REST-interface returns information about the current or most recent data session for a given
     // device.
     // SOAP-interface returns the current session information (IP address and session start time)
     // for one or more devices. If the specified device is not in session, no information is
     // returned.
-    final GetSessionInfoResponse getSessionInfoResponse = getSessionInfoResponseEntity.getBody();
     if (this.hasCurrentSession(getSessionInfoResponse)) {
       return getSessionInfoResponse;
     } else {