AccessEvaluator (Spring Boot Security for Vaadin 2.3.0 API)

All Known Implementing Classes:

RequiresRole.Evaluator, SecuredAccess.NotSetAccessEvaluator
```
public interface AccessEvaluator
```
An AccessEvaluator is the programmatic, more flexible alternative to expression-based access control for routes and endpoints.
Depending on the context, access evaluators are instantiated in different ways:
- Where a UI is available (which is the case for routes), Instantiator.getOrCreate(Class) will be used. I.e. the evaluator either needs to be available as a Spring bean or it requires a public no-args constructor.
- Otherwise (for endpoints) the evaluator is directly requested from the ApplicationContext and therefore needs to be available as a Spring bean.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`hasAccess(AccessContext accessContext)`	Returns whether access should be granted based on the given context.

- Method Detail
  - hasAccess
```
boolean hasAccess(AccessContext accessContext)
```
    Returns whether access should be granted based on the given context.
    VaadinSecurity can be used in implementations.
    
    Parameters:
    
    accessContext - the access context
    
    Returns:
    
    whether access should be granted