[#8]

add cause field to ErrorResponse

backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/controller/ErrorResponse.java

@@ -16,9 +16,17 @@
 public class ErrorResponse {
     private String errorCode;
     private String errorMessage;
+    private String cause;
+
+    public ErrorResponse(String errorCode, String errorMessage) {
+        this(errorCode, errorMessage, null);
+    }
 
     public ErrorResponse(HttpStatus httpStatus, String errorMessage) {
-        this.errorCode = String.valueOf(httpStatus.value());
-        this.errorMessage = errorMessage;
+        this(httpStatus, errorMessage, null);
+    }
+
+    public ErrorResponse(HttpStatus httpStatus, String errorCode, String cause) {
+        this(String.valueOf(httpStatus.value()), errorCode, cause);
     }
 }

backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/controller/MetadataResolversController.java

@@ -71,7 +71,7 @@ public class MetadataResolversController {
 
     @ExceptionHandler({InvalidTypeIdException.class, IOException.class, HttpMessageNotReadableException.class})
     public ResponseEntity<?> unableToParseJson(Exception ex) {
-        return ResponseEntity.badRequest().body(new ErrorResponse(HttpStatus.BAD_REQUEST.toString(), ex.getMessage()));
+        return ResponseEntity.badRequest().body(new ErrorResponse(HttpStatus.BAD_REQUEST.toString(), ex.getMessage(), ex.getCause().getMessage()));
     }
 
     @GetMapping("/MetadataResolvers")

backend/src/main/java/edu/internet2/tier/shibboleth/admin/ui/controller/support/RestControllersSupport.java

@@ -48,7 +48,7 @@ public ResponseEntity<ErrorResponse> handleDatabaseConstraintViolation(Constrain
 
     @ExceptionHandler(Exception.class)
     public final ResponseEntity<ErrorResponse> handleAllOtherExceptions(Exception ex) {
-        ErrorResponse errorResponse = new ErrorResponse("400", ex.getLocalizedMessage());
+        ErrorResponse errorResponse = new ErrorResponse("400", ex.getLocalizedMessage(), ex.getCause().getLocalizedMessage());
         return new ResponseEntity<>(errorResponse, HttpStatus.BAD_REQUEST);
     }