com.twitter.finatra.json.internal.caseclass.jackson.ImmutableAnnotations.scala Maven / Gradle / Ivy

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package com.twitter.finatra.json.internal.caseclass.jackson

import com.fasterxml.jackson.databind.util.Annotations
import com.twitter.finatra.conversions.seq._
import java.lang.annotation.Annotation

case class ImmutableAnnotations(
  annotations: Seq[Annotation])
  extends Annotations {

  private val annotationsMap: Map[Class[_ <: Annotation], Annotation] =
    annotations.groupBySingleValue(_.annotationType)

  override def get[A <: Annotation](cls: Class[A]): A = {
    annotationsMap.get(cls).orNull.asInstanceOf[A]
  }

  override def size(): Int = {
    annotationsMap.size
  }
}