org.hibernate.validator.internal.constraintvalidators.hv

Class UniqueElementsValidator

java.lang.Object

org.hibernate.validator.internal.constraintvalidators.hv.UniqueElementsValidator

All Implemented Interfaces:

ConstraintValidator<UniqueElements,Collection>

public class UniqueElementsValidator
extends Object
implements ConstraintValidator<UniqueElements,Collection>

Validates that the provided collection only contains unique elements, i.e. that we can't find 2 equal elements in the collection.

Uniqueness is defined by the equals() method of the objects being compared.

Author:

Tadhg Pearson, Guillaume Smet

Constructor Summary

Constructors

Constructor and Description
UniqueElementsValidator()

Method Summary

Modifier and Type	Method and Description
boolean	isValid(Collection collection, ConstraintValidatorContext constraintValidatorContext) Implements the validation logic.

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.validation.ConstraintValidator

initialize

Constructor Detail

UniqueElementsValidator

public UniqueElementsValidator()

Method Detail

isValid

public boolean isValid(Collection collection,
                       ConstraintValidatorContext constraintValidatorContext)

Description copied from interface: ConstraintValidator

Implements the validation logic. The state of value must not be altered.

This method can be accessed concurrently, thread-safety must be ensured by the implementation.

Specified by:

isValid in interface ConstraintValidator<UniqueElements,Collection>

Parameters:

collection - the collection to validate

constraintValidatorContext - context in which the constraint is evaluated

Returns:

true if the input collection is null or does not contain duplicate elements