org.hibernate.validator.internal.metadata.core
Class ConstraintHelper

java.lang.Object
  org.hibernate.validator.internal.metadata.core.ConstraintHelper

public class ConstraintHelper
extends Object

Keeps track of builtin constraints and their validator implementations, as well as already resolved validator definitions.

Author:

Hardy Ferentschik, Alaa Nassef, Gunnar Morling

Field Summary

static String	GROUPS
static String	MESSAGE
static String	PAYLOAD
static String	VALIDATION_APPLIES_TO

Constructor Summary

ConstraintHelper()

Method Summary

<A extends Annotation> List<Class<? extends ConstraintValidator<A,?>>>	findValidatorClasses(Class<A> annotationType, ValidationTarget validationTarget) Returns those validator classes for the given constraint annotation matching the given target.
<A extends Annotation> List<Class<? extends ConstraintValidator<A,?>>>	getAllValidatorClasses(Class<A> annotationType) Returns the constraint validator classes for the given constraint annotation type, as retrieved from Constraint.validatedBy(), internally registered validators for built-in constraints and XML configuration. The result is cached internally.
<A extends Annotation> List<Annotation>	getMultiValueConstraints(A annotation) Checks whether a given annotation is a multi value constraint and returns the contained constraints if so.
boolean	isConstraintAnnotation(Class<? extends Annotation> annotationType) Checks whether the specified annotation is a valid constraint annotation.
boolean	isConstraintComposition(Class<? extends Annotation> annotationType)
boolean	isMultiValueConstraint(Class<? extends Annotation> annotationType) Checks whether a given annotation is a multi value constraint or not.
<A extends Annotation> void	putValidatorClasses(Class<A> annotationType, List<Class<? extends ConstraintValidator<A,?>>> definitionClasses, boolean keepDefaultClasses) Registers the given validator classes with the given constraint annotation type.

Methods inherited from class java.lang.Object

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

Field Detail

GROUPS

public static final String GROUPS

See Also:

Constant Field Values

PAYLOAD

public static final String PAYLOAD

See Also:

Constant Field Values

MESSAGE

public static final String MESSAGE

See Also:

Constant Field Values

VALIDATION_APPLIES_TO

public static final String VALIDATION_APPLIES_TO

See Also:

Constant Field Values

Constructor Detail

ConstraintHelper

public ConstraintHelper()

Method Detail

getAllValidatorClasses

public <A extends Annotation> List<Class<? extends ConstraintValidator<A,?>>> getAllValidatorClasses(Class<A> annotationType)

Returns the constraint validator classes for the given constraint annotation type, as retrieved from

• Constraint.validatedBy(),
• internally registered validators for built-in constraints and
• XML configuration.

The result is cached internally.

Parameters:

annotationType - The constraint annotation type.

Returns:

The validator classes for the given type.

findValidatorClasses

public <A extends Annotation> List<Class<? extends ConstraintValidator<A,?>>> findValidatorClasses(Class<A> annotationType,
                                                                                                   ValidationTarget validationTarget)

Returns those validator classes for the given constraint annotation matching the given target.

Parameters:

annotationType - The annotation of interest.

validationTarget - The target, either annotated element or parameters.

Returns:

A list with matching validator classes.

putValidatorClasses

public <A extends Annotation> void putValidatorClasses(Class<A> annotationType,
                                                       List<Class<? extends ConstraintValidator<A,?>>> definitionClasses,
                                                       boolean keepDefaultClasses)

Registers the given validator classes with the given constraint annotation type.

Parameters:

annotationType - The constraint annotation type

definitionClasses - The validators to register

keepDefaultClasses - Whether any default validators should be kept or not

isMultiValueConstraint

public boolean isMultiValueConstraint(Class<? extends Annotation> annotationType)

Checks whether a given annotation is a multi value constraint or not.

Parameters:

annotationType - the annotation type to check.

Returns:

true if the specified annotation is a multi value constraints, false otherwise.

getMultiValueConstraints

public <A extends Annotation> List<Annotation> getMultiValueConstraints(A annotation)

Checks whether a given annotation is a multi value constraint and returns the contained constraints if so.

Parameters:

annotation - the annotation to check.

Returns:

A list of constraint annotations or the empty list if annotation is not a multi constraint annotation.

isConstraintAnnotation

public boolean isConstraintAnnotation(Class<? extends Annotation> annotationType)

Checks whether the specified annotation is a valid constraint annotation. A constraint annotation has to fulfill the following conditions:

• Must be annotated with Constraint
• Define a message parameter
• Define a group parameter
• Define a payload parameter

Parameters:

annotationType - The annotation type to test.

Returns:

true if the annotation fulfills the above conditions, false otherwise.

isConstraintComposition

public boolean isConstraintComposition(Class<? extends Annotation> annotationType)