当我尝试验证Scala的Map时，无论是可变的还是不可变的，我都得到了一个异常：

javax.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint 'javax.validation.constraints.Size' validating type 'scala.collection.mutable.Map<java.lang.String, java.lang.String>'. Check configuration for 'corporationSecrets'
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.throwExceptionForNullValidator(ConstraintTree.java:229) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getConstraintValidatorNoUnwrapping(ConstraintTree.java:310) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getConstraintValidatorInstanceForAutomaticUnwrapping(ConstraintTree.java:244) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.getInitializedConstraintValidator(ConstraintTree.java:163) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:116) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateComposingConstraints(ConstraintTree.java:398) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:98) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:87) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:73) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:621) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:584) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:528) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:496) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:461) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:411) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:208) ~[hibernate-validator-5.3.6.Final.jar:5.3.6.Final]
    at org.springframework.validation.beanvalidation.SpringValidatorAdapter.validate(SpringValidatorAdapter.java:102) ~[spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.validation.DataBinder.validate(DataBinder.java:877) ~[spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.boot.bind.PropertiesConfigurationFactory.doBindPropertiesToTarget(PropertiesConfigurationFactory.java:274) ~[spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
    at org.springframework.boot.bind.PropertiesConfigurationFactory.bindPropertiesToTarget(PropertiesConfigurationFactory.java:240) ~[spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
    at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.postProcessBeforeInitialization(ConfigurationPropertiesBindingPostProcessor.java:330) ~[spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
    ... 29 common frames omitted

字符串
我的代码很简单，就像

@NotEmpty
val corporationSecrets : scala.collection.mutable.Map[String, String] = new scala.collection.mutable.HashMap[String, String]

型
我如何验证一个scala的map来检查它是否为空？

3条答案

按热度按时间

ftf50wuq1#

因此，您必须了解的是，在Hibernate Validator中，对于给定的约束，您为不同类型注册约束验证器。
通常，对于@Size约束，我们将为String、Collection、Map、数组等注册约束验证器。
这里的问题是Scala类型没有实现经典的Java接口，所以我们找不到它们的约束验证器。这就是为什么会出现异常：HV识别出了约束，但找不到约束验证器将其应用到Scala Map上。
就我从代码中所看到的，https://github.com/bean-validation-scala/bean-validation-scala将是为Scala获得BV和HV支持的方法。它将验证委托给原始HV实现，因此您应该具有与Java非常相似的行为。
我不认为它已经过时了，因为请记住，在我们开始BV 2.0和HV 6.0的工作之前，BV/HV项目有一段时间没有太大的变化。

赞(0）回复(0）举报 7个月前

aij0ehis2#

如果你想检查Map集合是否为空，你可以这样做：if(mapVariable.isEmpty() || mapVariable == null){...}
或者按照第二个链接（指向API的链接）中的说明编写traversable shouldBe empty或javaMap should not be empty。查看this或this以获取更多信息。

编辑

尝试将@Valid添加到集合中。
下面是一个来自Hibernate Validator参考的例子。

public class Car { 
@NotNull 
@Valid 
private List<Person> passengers = new ArrayList<Person>(); 
}

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这是标准的JSR-303行为。请参见spec的第3.1.3节。

jk9hmnmh3#

这是一个Jakarta Bean Validation 3.0 for Scala 2.13和3.3 https://github.com/bitlap/validation-scala

抛出javax.validation.UnexpectedTypeException：使用@NotEmpty验证Scala的Map时发生HV 000030异常

3条答案

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