org.hibernate.validator.ap.util
Class ConstraintHelper

java.lang.Object
  org.hibernate.validator.ap.util.ConstraintHelper

public class ConstraintHelper
extends Object

Helper class that deals with all constraint-related stuff, such as determining whether a given annotation represents a constraint annotation or whether a given annotation is allowed to be declared at a given element.

Author:

Gunnar Morling

Nested Class Summary

static class	ConstraintHelper.AnnotationType The type of an annotation with respect to the BV API.
static class	ConstraintHelper.ConstraintCheckResult Possible results of a constraint check as returned by checkConstraint(DeclaredType, TypeMirror).

Constructor Summary

ConstraintHelper(javax.lang.model.util.Elements elementUtils, javax.lang.model.util.Types typeUtils, AnnotationApiHelper annotationApiHelper)

Method Summary

ConstraintHelper.ConstraintCheckResult	checkConstraint(javax.lang.model.type.DeclaredType constraintAnnotationType, javax.lang.model.type.TypeMirror typeOfAnnotatedElement) Checks whether the given annotation type (which must be a constraint annotation type) may be specified at elements of the specified type.
ConstraintHelper.AnnotationType	getAnnotationType(javax.lang.model.element.AnnotationMirror annotationMirror) Returns the ConstraintHelper.AnnotationType of the given annotation.
List<javax.lang.model.element.AnnotationMirror>	getPartsOfMultiValuedConstraint(javax.lang.model.element.AnnotationMirror annotationMirror) Returns a list with the constraint annotations contained in the given array-valued annotation mirror.
boolean	isConstraintAnnotation(javax.lang.model.element.Element element) Checks, whether the given type element represents a constraint annotation or not.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstraintHelper

public ConstraintHelper(javax.lang.model.util.Elements elementUtils,
                        javax.lang.model.util.Types typeUtils,
                        AnnotationApiHelper annotationApiHelper)

Method Detail

isConstraintAnnotation

public boolean isConstraintAnnotation(javax.lang.model.element.Element element)

Checks, whether the given type element represents a constraint annotation or not. That's the case, if the given element is annotated with the Constraint meta-annotation (which is only allowed at annotation declarations).

Parameters:

element - The element of interest.

Returns:

True, if the given element is a constraint annotation type, false otherwise.

getAnnotationType

public ConstraintHelper.AnnotationType getAnnotationType(javax.lang.model.element.AnnotationMirror annotationMirror)

Returns the ConstraintHelper.AnnotationType of the given annotation.

Parameters:

annotationMirror - The annotation mirror of interest.

Returns:

The given mirror's annotation type.

getPartsOfMultiValuedConstraint

public List<javax.lang.model.element.AnnotationMirror> getPartsOfMultiValuedConstraint(javax.lang.model.element.AnnotationMirror annotationMirror)

Returns a list with the constraint annotations contained in the given array-valued annotation mirror.

Parameters:

annotationMirror - An array-valued annotation mirror (meaning it has an array-typed attribute with name "value").

Returns:

A list with the constraint annotations part of the given multi-valued constraint annotation. Will return an empty list if the given annotation is no multi-valued annotation or if no constraint annotations are contained within the given array-valued annotation.

checkConstraint

public ConstraintHelper.ConstraintCheckResult checkConstraint(javax.lang.model.type.DeclaredType constraintAnnotationType,
                                                              javax.lang.model.type.TypeMirror typeOfAnnotatedElement)

Checks whether the given annotation type (which must be a constraint annotation type) may be specified at elements of the specified type.

Parameters:

constraintAnnotationType - A constraint annotation type.

typeOfAnnotatedElement - A type which with an element is annotated.

Returns:

Whether the given constraint annotation may be specified at elements of the given type.