com.vaadin.flow.router.HasErrorParameter API 23.1.17 | Vaadin

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com.vaadin.flow.router.

Type Parameters:

T - type Exception type handled

All Superinterfaces:

Serializable

All Known Implementing Classes:

InternalServerError, RouteNotFoundError

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface HasErrorParameter<T extends Exception>
extends Serializable
```
Defines a view that handles the exceptions for the set Exception type T.

Since:

1.0

Author:

Vaadin Ltd

Method Summary

All Methods
Modifier and Type	Method	Description
`int`	`setErrorParameter(BeforeEnterEvent event, ErrorParameter<T> parameter)`	Callback executed before rendering the exception view.

- Method Detail
  - setErrorParameter
```
int setErrorParameter(BeforeEnterEvent event,
                      ErrorParameter<T> parameter)
```
    Callback executed before rendering the exception view.
    Note! returned int should be a valid HttpStatusCode code
    
    Parameters:
    
    event - the before navigation event for this request
    
    parameter - error parameter containing custom exception and caught exception
    
    Returns:
    
    a valid HttpStatusCode code