ConstraintValidator

```
public interface ConstraintValidator<A extends java.lang.annotation.Annotation,T>
```
Defines the logic to validate a given constraint A for a given object type T.
Implementations must comply to the following restriction:
- T must resolve to a non parameterized type
- or generic parameters of T must be unbounded wildcard types
The annotation SupportedValidationTarget can be put on a ConstraintValidator implementation to mark it as supporting cross-parameter constraints. Check out SupportedValidationTarget and Constraint for more information.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`initialize(A constraintAnnotation)`	Initializes the validator in preparation for `isValid(Object, ConstraintValidatorContext)` calls.
`boolean`	`isValid(T value, ConstraintValidatorContext context)`	Implements the validation logic.

- Method Detail
  - initialize
```
void initialize(A constraintAnnotation)
```
    Initializes the validator in preparation for isValid(Object, ConstraintValidatorContext) calls. The constraint annotation for a given constraint declaration is passed.
    This method is guaranteed to be called before any use of this instance for validation.
    
    Parameters:
    
    constraintAnnotation - annotation instance for a given constraint declaration
  - isValid
```
boolean isValid(T value,
                ConstraintValidatorContext context)
```
    Implements the validation logic. The state of value must not be altered.
    This method can be accessed concurrently, thread-safety must be ensured by the implementation.
    
    Parameters:
    
    value - object to validate
    
    context - context in which the constraint is evaluated
    
    Returns:
    
    false if value does not pass the constraint