h1. Context
* Method constraints validation
* Kotlin
** Presence of extension function on parameterized type within the validated object
h1. Problem
Given the following code making use of method constraint validation
*SimpleFooService.kt*
{noformat}package foo
import org.slf4j.LoggerFactory
import javax.validation.Validation
import javax.validation.constraints.NotEmpty
class SimpleFooService {
fun methodName(@NotEmpty ignored: String) {
// no-op
}
private fun List<String>.someExtensionFunction(extensionFunctionArg: Int) = Unit
}
fun main() {
val validator = Validation.buildDefaultValidatorFactory().validator
val executableValidator = validator.forExecutables()
try {
executableValidator.validateParameters(
SimpleFooService(),
SimpleFooService::class.java.getDeclaredMethod(SimpleFooService::methodName.name, String::class.java),
arrayOf("Some value")
)
} catch (e: Exception) {
log.error("Error", e)
}
}
val log = LoggerFactory.getLogger(SimpleFooService::class.java){noformat}
Attempting to execute the code leads to {{ArrayIndexOutOfBoundsException}} and the given arguments not being validated:
{noformat}2020-08-04 16:14:41,937 [main] DEBUG - org.jboss.logging - Logging Provider: org.jboss.logging.Slf4jLoggerProvider
2020-08-04 16:14:41,949 [main] INFO - org.hibernate.validator.internal.util.Version - HV000001: Hibernate Validator 6.1.5.Final
2020-08-04 16:14:41,975 [main] DEBUG - org.hibernate.validator.internal.xml.config.ValidationXmlParser - Trying to load META-INF/validation.xml for XML based Validator configuration.
2020-08-04 16:14:41,977 [main] DEBUG - org.hibernate.validator.internal.xml.config.ResourceLoaderHelper - Trying to load META-INF/validation.xml via TCCL
2020-08-04 16:14:41,979 [main] DEBUG - org.hibernate.validator.internal.xml.config.ResourceLoaderHelper - Trying to load META-INF/validation.xml via Hibernate Validator's class loader
2020-08-04 16:14:41,980 [main] DEBUG - org.hibernate.validator.internal.xml.config.ValidationXmlParser - No META-INF/validation.xml found. Using annotation based configuration only.
2020-08-04 16:14:41,986 [main] DEBUG - org.hibernate.validator.internal.engine.resolver.TraversableResolvers - Cannot find javax.persistence.Persistence on classpath. Assuming non JPA 2 environment. All properties will per default be traversable.
2020-08-04 16:14:42,083 [main] DEBUG - org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator - Loaded expression factory via original TCCL
2020-08-04 16:14:42,434 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000252: Using org.hibernate.validator.internal.engine.DefaultPropertyNodeNameProvider as property node name provider.
2020-08-04 16:14:42,443 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator as ValidatorFactory-scoped message interpolator.
2020-08-04 16:14:42,443 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.internal.engine.resolver.TraverseAllTraversableResolver as ValidatorFactory-scoped traversable resolver.
2020-08-04 16:14:42,443 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.internal.util.ExecutableParameterNameProvider as ValidatorFactory-scoped parameter name provider.
2020-08-04 16:14:42,444 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.internal.engine.DefaultClockProvider as ValidatorFactory-scoped clock provider.
2020-08-04 16:14:42,444 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.internal.engine.scripting.DefaultScriptEvaluatorFactory as ValidatorFactory-scoped script evaluator factory.
2020-08-04 16:14:42,541 [main] ERROR - foo.SimpleFooService - Error
java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getTypeParametersCascadingMetaDataForParameterizedType(AnnotationMetaDataProvider.java:678) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getTypeParametersCascadingMetadata(AnnotationMetaDataProvider.java:660) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.findCascadingMetaData(AnnotationMetaDataProvider.java:627) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getParameterMetaData(AnnotationMetaDataProvider.java:432) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.findExecutableMetaData(AnnotationMetaDataProvider.java:308) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getMetaData(AnnotationMetaDataProvider.java:292) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getMethodMetaData(AnnotationMetaDataProvider.java:279) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.retrieveBeanConfiguration(AnnotationMetaDataProvider.java:130) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getBeanConfiguration(AnnotationMetaDataProvider.java:120) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.BeanMetaDataManagerImpl.getBeanConfigurationForHierarchy(BeanMetaDataManagerImpl.java:234) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.BeanMetaDataManagerImpl.createBeanMetaData(BeanMetaDataManagerImpl.java:201) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.metadata.BeanMetaDataManagerImpl.getBeanMetaData(BeanMetaDataManagerImpl.java:165) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.engine.ValidatorImpl.validateParameters(ValidatorImpl.java:267) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at org.hibernate.validator.internal.engine.ValidatorImpl.validateParameters(ValidatorImpl.java:235) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
at foo.FooServiceKt.main(FooService.kt:19) ~[main/:na]
at foo.FooServiceKt.main(FooService.kt) ~[main/:na]{noformat}
h1. Preliminary analysis
Debugging reveals that {{org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider#findExecutableMetaData}} [ is retrieving |https://github.com/hibernate/hibernate-validator/blob/6.1.5.Final/engine/src/main/java/org/hibernate/validator/internal/metadata/provider/AnnotationMetaDataProvider.java#L307] a incorrect {{JavaBeanExecutable}} result from {{JavaBeanHelper}} when processing the {{private final void foo.SimpleFooService.someExtensionFunction(java.util.List,int)}} method:
!image-2020-08-05-00-24-18-321.png|width=200,height=183!
(!) The {{extensionFunctionArg}} argument has the {{List<String>}} type associated to it, instead of {{int}}
That inconsistency causes {{AnnotationMetaDataProvider.getTypeParametersCascadingMetaDataForParameterizedType}} to fail.
h1. Workaround
Workaround is to remove all extension functions on parameterized receiver from the validated class (which may not be desirable).
h1. Build setup
*build.gradle.kts*
{ code:java noformat }import org.jetbrains.kotlin.gradle.dsl.KotlinCompile
import org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions
plugins {
kotlin("jvm") version "1.3.72"
}
group = "org.example"
version = "1.0-SNAPSHOT"
repositories {
mavenCentral()
}
dependencies {
implementation(kotlin("stdlib"))
implementation(platform("org.springframework.boot:spring-boot-dependencies:2.3.2.RELEASE"))
implementation("org.slf4j:slf4j-api")
implementation("ch.qos.logback:logback-classic")
implementation("org.hibernate.validator:hibernate-validator")
implementation("org.glassfish:jakarta.el")
}
tasks {
"wrapper"(Wrapper::class) {
gradleVersion = "6.5.1"
distributionType = Wrapper.DistributionType.ALL
}
withType<KotlinCompile<KotlinJvmOptions>>().configureEach {
kotlinOptions {
jvmTarget = "11"
javaParameters = true
}
}
}{ code noformat } |
|
