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when paranamer fails, fail over to using java reflection #566

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Jan 29, 2022
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when paranamer fails, fail over to using java reflection #566

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16 changes: 11 additions & 5 deletions src/main/scala/com/fasterxml/jackson/module/scala/introspect/JavaParameterIntrospector.scala
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Original file line number Diff line number Diff line change
@@ -1,23 +1,29 @@
package com.fasterxml.jackson.module.scala.introspect

import java.lang.reflect.{Constructor, Field, Method, Parameter}

import com.thoughtworks.paranamer.{BytecodeReadingParanamer, CachingParanamer}

import java.lang.reflect.{Constructor, Field, Method, Parameter}
import scala.util.Try

private[introspect] object JavaParameterIntrospector {

private val paranamer = new CachingParanamer(new BytecodeReadingParanamer)

def getCtorParamNames(ctor: Constructor[_]): IndexedSeq[String] = {
paranamer.lookupParameterNames(ctor, false).toIndexedSeq
Try(paranamer.lookupParameterNames(ctor, false))
.getOrElse(ctor.getParameters.map(_.getName))
.toIndexedSeq
}

def getMethodParamNames(mtd: Method): IndexedSeq[String] = {
paranamer.lookupParameterNames(mtd, false).toIndexedSeq
Try(paranamer.lookupParameterNames(mtd, false))
.getOrElse(mtd.getParameters.map(_.getName))
.toIndexedSeq
}

def getFieldName(field: Field): String = {
paranamer.lookupParameterNames(field, false).headOption.getOrElse(None.orNull)
Try(paranamer.lookupParameterNames(field, false).headOption.getOrElse(None.orNull))
.getOrElse(field.getName)
}

def getParameterName(parameter: Parameter): String = parameter.getName
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