io.circe.generic.extras.ConfigurableDeriver.scala Maven / Gradle / Ivy
package io.circe.generic.extras
import io.circe.generic.extras.decoding.{ ConfiguredDecoder, ReprDecoder }
import io.circe.generic.extras.encoding.{ ConfiguredObjectEncoder, ReprObjectEncoder }
import io.circe.generic.util.macros.DerivationMacros
import macrocompat.bundle
import scala.reflect.macros.whitebox
@bundle
class ConfigurableDeriver(val c: whitebox.Context)
extends DerivationMacros[ReprDecoder, ReprObjectEncoder, ConfiguredDecoder, ConfiguredObjectEncoder] {
import c.universe._
def deriveDecoder[R: c.WeakTypeTag]: c.Expr[ReprDecoder[R]] = c.Expr[ReprDecoder[R]](constructDecoder[R])
def deriveEncoder[R: c.WeakTypeTag]: c.Expr[ReprObjectEncoder[R]] = c.Expr[ReprObjectEncoder[R]](constructEncoder[R])
protected[this] val RD: TypeTag[ReprDecoder[_]] = c.typeTag
protected[this] val RE: TypeTag[ReprObjectEncoder[_]] = c.typeTag
protected[this] val DD: TypeTag[ConfiguredDecoder[_]] = c.typeTag
protected[this] val DE: TypeTag[ConfiguredObjectEncoder[_]] = c.typeTag
protected[this] val hnilReprDecoder: Tree = q"_root_.io.circe.generic.extras.decoding.ReprDecoder.hnilReprDecoder"
protected[this] val decodeMethodName: TermName = TermName("configuredDecode")
protected[this] val decodeAccumulatingMethodName: TermName = TermName("configuredDecodeAccumulating")
protected[this] override def decodeMethodArgs: List[Tree] = List(
q"transformMemberNames: (_root_.java.lang.String => _root_.java.lang.String)",
q"transformConstructorNames: (_root_.java.lang.String => _root_.java.lang.String)",
q"defaults: _root_.scala.collection.immutable.Map[_root_.java.lang.String, _root_.scala.Any]",
q"discriminator: _root_.scala.Option[_root_.java.lang.String]"
)
protected[this] def encodeMethodName: TermName = TermName("configuredEncodeObject")
protected[this] override def encodeMethodArgs: List[Tree] = List(
q"transformMemberNames: (_root_.java.lang.String => _root_.java.lang.String)",
q"transformConstructorNames: (_root_.java.lang.String => _root_.java.lang.String)",
q"discriminator: _root_.scala.Option[_root_.java.lang.String]"
)
protected[this] def decodeField(name: String, decode: TermName): Tree = q"""
orDefault(
$decode.tryDecode(c.downField(transformMemberNames($name))),
$name,
defaults
)
"""
protected[this] def decodeFieldAccumulating(name: String, decode: TermName): Tree = q"""
orDefaultAccumulating(
$decode.tryDecodeAccumulating(c.downField(transformMemberNames($name))),
$name,
defaults
)
"""
protected[this] def decodeSubtype(name: String, decode: TermName): Tree = q"""
withDiscriminator(
$decode,
c,
transformConstructorNames($name),
discriminator
)
"""
protected[this] def decodeSubtypeAccumulating(name: String, decode: TermName): Tree = q"""
withDiscriminatorAccumulating(
$decode,
c,
transformConstructorNames($name),
discriminator
)
"""
protected[this] def encodeField(name: String, encode: TermName, value: TermName): Tree =
q"(transformMemberNames($name), $encode($value))"
protected[this] def encodeSubtype(name: String, encode: TermName, value: TermName): Tree =
q"addDiscriminator($encode, $value, transformConstructorNames($name), discriminator)"
}