Package org.springframework.validation

Interface SmartValidator

All Superinterfaces:

Validator

All Known Implementing Classes:

CustomValidatorBean, LocalValidatorFactoryBean, OptionalValidatorFactoryBean, SpringValidatorAdapter

public interface SmartValidator
extends Validator

Extended variant of the Validator interface, adding support for validation 'hints'.

Since:

3.1

Author:

Juergen Hoeller, Sam Brannen

Method Summary

Modifier and Type	Method	Description
default <T> T	unwrap(Class<T> type)	Return a contained validator instance of the specified type, unwrapping as far as necessary.
void	validate(Object target, Errors errors, Object... validationHints)	Validate the supplied target object, which must be of a type of Class for which the Validator.supports(Class) method typically returns true.
default void	validateValue(Class<?> targetType, String fieldName, Object value, Errors errors, Object... validationHints)	Validate the supplied value for the specified field on the target type, reporting the same validation errors as if the value would be bound to the field on an instance of the target class.

Methods inherited from interface org.springframework.validation.Validator

supports, validate, validateObject

Method Details

validate

void validate(Object target,
 Errors errors,
 Object... validationHints)

Validate the supplied target object, which must be of a type of Class for which the Validator.supports(Class) method typically returns true.

The supplied errors instance can be used to report any resulting validation errors.

This variant of validate() supports validation hints, such as validation groups against a JSR-303 provider (in which case, the provided hint objects need to be annotation arguments of type Class).

Note: Validation hints may get ignored by the actual target Validator, in which case this method should behave just like its regular Validator.validate(Object, Errors) sibling.

Parameters:

target - the object that is to be validated

errors - contextual state about the validation process

validationHints - one or more hint objects to be passed to the validation engine

See Also:

• Validator.validate(Object, Class[])

validateValue

default void validateValue(Class<?> targetType,
 String fieldName,
 @Nullable
 Object value,
 Errors errors,
 Object... validationHints)

Validate the supplied value for the specified field on the target type, reporting the same validation errors as if the value would be bound to the field on an instance of the target class.

Parameters:

targetType - the target type

fieldName - the name of the field

value - the candidate value

errors - contextual state about the validation process

validationHints - one or more hint objects to be passed to the validation engine

Since:

5.1

See Also:

• Validator.validateValue(Class, String, Object, Class[])

unwrap

@Nullable
default <T> T unwrap(@Nullable
 Class<T> type)

Return a contained validator instance of the specified type, unwrapping as far as necessary.

Type Parameters:

T - the type of the object to return

Parameters:

type - the class of the object to return

Returns:

a validator instance of the specified type; null if there isn't a nested validator; an exception may be raised if the specified validator type does not match.

Since:

6.1