我用Hibernate映射了一个Scala类。该类包含一个惰性val，因此Scala会自动创建一个名为bitmap$0的类属性，不幸的是，该属性也被Hibernate映射。
如何防止Hibernate映射此自动生成的属性？
如何使Hibernate忽略特定名称的属性？
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问答
sky43420024420 回答：如何使Hibernate忽略特定名称的属性？
好的，我找到了解决方案。我设置了一个自定义MetadataProvider，它为@Transient属性伪造了bitmap$0注释。
设置自定义MetadataProvider：
configuration.getReflectionManager.asInstanceOf[JavaReflectionManager].setMetadataProvider(new JavaMetadataProvider {
override def getAnnotationReader(annotatedElement: AnnotatedElement): AnnotationReader = {
if (annotatedElement.toString.endsWith("bitmap$0")) {
new TransientAnnotationReader(annotatedElement)
} else {
new JavaAnnotationReader(annotatedElement)
}
}
})
涉及的课程：
class JavaAnnotationReader(val element: AnnotatedElement) extends AnnotationReader {
override def getAnnotation[T <: Annotation](annotationType: Class[T]): T = element.getAnnotation(annotationType)
override def isAnnotationPresent[T <: Annotation](annotationType: Class[T]): Boolean = element.isAnnotationPresent(annotationType)
override def getAnnotations: Array[Annotation] = element.getAnnotations
}
class TransientAnnotationReader(val element: AnnotatedElement) extends AnnotationReader {
override def getAnnotation[T <: Annotation](annotationType: Class[T]): T = element.getAnnotation(annotationType)
override def isAnnotationPresent[T <: Annotation](annotationType: Class[T]): Boolean = annotationType == classOf[Transient]
override def getAnnotations: Array[Annotation] = element.getAnnotations
}