javax.validation.metadata

Interface ConstraintDescriptor<T extends Annotation>

Type Parameters:

T - the constraint's annotation type

public interface ConstraintDescriptor<T extends Annotation>

Describes a single constraint and its composing constraints.

Author:

Emmanuel Bernard, Hardy Ferentschik

Method Summary

Modifier and Type	Method and Description
T	getAnnotation() Returns the annotation describing the constraint declaration.
Map<String,Object>	getAttributes() Returns a map containing the annotation attribute names as keys and the annotation attribute values as value.
Set<ConstraintDescriptor<?>>	getComposingConstraints() Return a set of composing ConstraintDescriptors where each descriptor describes a composing constraint.
List<Class<? extends ConstraintValidator<T,?>>>	getConstraintValidatorClasses() List of the constraint validation implementation classes.
Set<Class<?>>	getGroups() The set of groups the constraint is applied on.
String	getMessageTemplate() The non-interpolated error message
Set<Class<? extends Payload>>	getPayload() The set of payload the constraint hosts.
ConstraintTarget	getValidationAppliesTo() The ConstraintTarget value of validationAppliesTo if the constraint hosts it or null otherwise.
ValidateUnwrappedValue	getValueUnwrapping()
boolean	isReportAsSingleViolation()
<U> U	unwrap(Class<U> type) Returns an instance of the specified type allowing access to provider-specific APIs.

Method Detail

getAnnotation

T getAnnotation()

Returns the annotation describing the constraint declaration. If a composing constraint, attribute values are reflecting the overridden attributes of the composing constraint

Returns:

the annotation for this constraint

getMessageTemplate

String getMessageTemplate()

The non-interpolated error message

Returns:

the non-interpolated error message

Since:

1.1

getGroups

Set<Class<?>> getGroups()

The set of groups the constraint is applied on. If the constraint declares no group, a set with only the Default group is returned.

Returns:

the groups the constraint is applied on

getPayload

Set<Class<? extends Payload>> getPayload()

The set of payload the constraint hosts.

Returns:

payload classes hosted on the constraint or an empty set if none

getValidationAppliesTo

ConstraintTarget getValidationAppliesTo()

The ConstraintTarget value of validationAppliesTo if the constraint hosts it or null otherwise.

Returns:

the ConstraintTarget value or null

Since:

1.1

getConstraintValidatorClasses

List<Class<? extends ConstraintValidator<T,?>>> getConstraintValidatorClasses()

List of the constraint validation implementation classes.

Returns:

list of the constraint validation implementation classes

getAttributes

Map<String,Object> getAttributes()

Returns a map containing the annotation attribute names as keys and the annotation attribute values as value.

If this constraint is used as part of a composed constraint, attribute values are reflecting the overridden attribute of the composing constraint.

Returns:

a map containing the annotation attribute names as keys and the annotation attribute values as value

getComposingConstraints

Set<ConstraintDescriptor<?>> getComposingConstraints()

Return a set of composing ConstraintDescriptors where each descriptor describes a composing constraint. ConstraintDescriptor instances of composing constraints reflect overridden attribute values in getAttributes() and getAnnotation().

Returns:

a set of ConstraintDescriptor objects or an empty set in case there are no composing constraints

isReportAsSingleViolation

boolean isReportAsSingleViolation()

Returns:

true if the constraint is annotated with ReportAsSingleViolation

getValueUnwrapping

ValidateUnwrappedValue getValueUnwrapping()

Returns:

a ValidateUnwrappedValue describing the unwrapping behavior as given via the Unwrapping constraint payloads.

Since:

2.0

unwrap

<U> U unwrap(Class<U> type)

Returns an instance of the specified type allowing access to provider-specific APIs.

If the Bean Validation provider implementation does not support the specified class, a ValidationException is thrown.

Type Parameters:

U - the type of the object to be returned

Parameters:

type - the class of the object to be returned

Returns:

an instance of the specified class

Throws:

ValidationException - if the provider does not support the call

Since:

2.0