org.hibernate.validator.internal.engine.constraintvalidation.LambdaBasedValidatorDescriptor Maven / Gradle / Ivy
/*
* Hibernate Validator, declare and validate application constraints
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or .
*/
package org.hibernate.validator.internal.engine.constraintvalidation;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.EnumSet;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.ConstraintValidatorFactory;
import javax.validation.constraintvalidation.ValidationTarget;
import org.hibernate.validator.cfg.context.ConstraintDefinitionContext.ValidationCallable;
/**
* Represents a constraint validator based on a Lambda expression.
*
* @author Gunnar Morling
*/
class LambdaBasedValidatorDescriptor implements ConstraintValidatorDescriptor {
private static final long serialVersionUID = 5129757824081595723L;
private final Type validatedType;
private final ValidationCallable lambda;
public LambdaBasedValidatorDescriptor(Type validatedType, ValidationCallable lambda) {
this.validatedType = validatedType;
this.lambda = lambda;
}
@SuppressWarnings("unchecked")
@Override
public Class> getValidatorClass() {
Class clazz = LambdaExecutor.class;
return (Class>) clazz;
}
@Override
public EnumSet getValidationTargets() {
return EnumSet.of( ValidationTarget.ANNOTATED_ELEMENT );
}
@Override
public Type getValidatedType() {
return validatedType;
}
@Override
public ConstraintValidator newInstance(ConstraintValidatorFactory constraintValidatorFactory) {
return new LambdaExecutor<>( lambda );
}
private static class LambdaExecutor implements ConstraintValidator {
private final ValidationCallable lambda;
public LambdaExecutor(ValidationCallable lambda) {
this.lambda = lambda;
}
@Override
public boolean isValid(T value, ConstraintValidatorContext context) {
return lambda.isValid( value );
}
}
}