feat(QTDI-1291): npe protections

Author: ozhelezniak-talend

component-server-parent/component-server/src/main/java/org/talend/sdk/component/server/front/ActionResourceImpl.java

@@ -42,8 +42,8 @@
 import javax.ws.rs.core.Response;
 
 import org.talend.sdk.component.api.exception.ComponentException;
-import org.talend.sdk.component.api.exception.ComponentException.ErrorOrigin;
 import org.talend.sdk.component.api.exception.DiscoverSchemaException;
+import org.talend.sdk.component.api.exception.DiscoverSchemaException.HandleErrorWith;
 import org.talend.sdk.component.runtime.manager.ComponentManager;
 import org.talend.sdk.component.runtime.manager.ContainerComponentRegistry;
 import org.talend.sdk.component.runtime.manager.ServiceMeta;
@@ -224,7 +224,9 @@ private Response onError(final Throwable re) {
                         : "no error message");
         if (re instanceof final DiscoverSchemaException eSchema) {
             // we send reason to recognize the error on client side
-            final String subCode = eSchema.getPossibleHandleErrorWith().toString();
+            final String subCode = ofNullable(eSchema.getPossibleHandleErrorWith())
+                    .orElse(HandleErrorWith.EXCEPTION)
+                    .toString();
             throw new WebApplicationException(Response
                     .status(400, subCode)
                     .entity(new ErrorPayload(ErrorDictionary.ACTION_ERROR, subCode, description))
@@ -243,6 +245,10 @@ private Response onError(final Throwable re) {
     }
 
     private static int evaluateStatusCodeForException(final ComponentException eComponent) {
+        if (null == eComponent.getErrorOrigin()) {
+            return 520;
+        }
+
         return switch (eComponent.getErrorOrigin()) {
             case USER -> 400;
             case BACKEND -> 456;