Package com.vaadin.flow.data.validator

Class BeanValidator

java.lang.Object

com.vaadin.flow.data.validator.BeanValidator

All Implemented Interfaces:

Validator<Object>, Serializable, BiFunction<Object,ValueContext,ValidationResult>

public class BeanValidator
extends Object
implements Validator<Object>

A Validator using the JSR-303 (javax.validation) annotation-based bean validation mechanism. Values passed to this validator are compared against the constraints, if any, specified by annotations on the corresponding bean property.

Note that a JSR-303 implementation (for instance Hibernate Validator or Apache BVal) must be present on the project classpath when using bean validation. Specification versions 1.0 and 1.1 are supported.

Since:

1.0.

Author:

Vaadin Ltd

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
BeanValidator(Class<?> beanType, String propertyName)	Creates a new JSR-303 BeanValidator that validates values of the specified property.

Method Summary

Modifier and Type	Method	Description
ValidationResult	apply(Object value, ValueContext context)	Validates the given value as if it were the value of the bean property configured for this validator.
protected javax.validation.MessageInterpolator.Context	createContext(javax.validation.ConstraintViolation<?> violation)	Creates a simple message interpolation context based on the given constraint violation.
javax.validation.Validator	getJavaxBeanValidator()	Returns a shared JSR-303 validator instance to use.
protected static javax.validation.ValidatorFactory	getJavaxBeanValidatorFactory()	Returns the underlying JSR-303 bean validator factory used.
protected String	getMessage(javax.validation.ConstraintViolation<?> violation, Locale locale)	Returns the interpolated error message for the given constraint violation using the locale specified for this validator.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.function.BiFunction

andThen

Constructor Detail

BeanValidator

public BeanValidator(Class<?> beanType,
                     String propertyName)

Creates a new JSR-303 BeanValidator that validates values of the specified property. Localizes validation messages using the default locale.

Parameters:

beanType - the bean type declaring the property, not null

propertyName - the property to validate, not null

Throws:

IllegalStateException - if BeanUtil.checkBeanValidationAvailable() returns false

Method Detail

apply

public ValidationResult apply(Object value,
                              ValueContext context)

Validates the given value as if it were the value of the bean property configured for this validator. Returns Result.ok if there are no JSR-303 constraint violations, a Result.error of chained constraint violation messages otherwise.

Null values are accepted unless the property has an @NotNull annotation or equivalent.

Specified by:

apply in interface BiFunction<Object,ValueContext,ValidationResult>

Specified by:

apply in interface Validator<Object>

Parameters:

value - the input value to validate

context - the value context for validation

Returns:

the validation result

toString

public String toString()

Overrides:

toString in class Object

getJavaxBeanValidatorFactory

protected static javax.validation.ValidatorFactory getJavaxBeanValidatorFactory()

Returns the underlying JSR-303 bean validator factory used. A factory is created using Validation if necessary.

Returns:

the validator factory to use

getJavaxBeanValidator

public javax.validation.Validator getJavaxBeanValidator()

Returns a shared JSR-303 validator instance to use.

Returns:

the validator to use

getMessage

protected String getMessage(javax.validation.ConstraintViolation<?> violation,
                            Locale locale)

Returns the interpolated error message for the given constraint violation using the locale specified for this validator.

Parameters:

violation - the constraint violation

locale - the used locale

Returns:

the localized error message

createContext

protected javax.validation.MessageInterpolator.Context createContext(javax.validation.ConstraintViolation<?> violation)

Creates a simple message interpolation context based on the given constraint violation.

Parameters:

violation - the constraint violation

Returns:

the message interpolation context