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package.scala
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package.scala
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/*
Copyright 2017-2020 Erik Erlandson
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package coulomb
import scala.util.{ Try, Success, Failure }
import scala.reflect.runtime.universe.WeakTypeTag
import _root_.pureconfig.{ConfigReader, ConfigWriter, ConfigCursor}
import _root_.pureconfig.error.{CannotConvert, ConfigReaderFailures, ConvertFailure}
import com.typesafe.config.ConfigValue
import coulomb.unitops.UnitString
import coulomb.parser.unitops.UnitTypeString
import coulomb.parser.QuantityParser
package pureconfig.infra {
// other libs can override with more specific pureconfig rules
trait CoulombPureconfigOverride[V]
case class ConfigQuantity[V](value: V, unit: String)
}
/**
* Defines ConfigReader and ConfigWriter to save and load coulomb Quantity fields
*/
package object pureconfig {
import coulomb.infra.NoImplicit
import coulomb.pureconfig.infra._
/** Manifest a ConfigWriter for `Quantity[V, U]` */
implicit def coulombQuantityConfigWriter[V, U](implicit
ovr: NoImplicit[CoulombPureconfigOverride[V]],
qcw: ConfigWriter[ConfigQuantity[V]],
ustr: UnitString[U]
): ConfigWriter[Quantity[V, U]] = new ConfigWriter[Quantity[V, U]] {
def to(q: Quantity[V, U]): ConfigValue =
qcw.to(ConfigQuantity(q.value, q.showUnitFull))
}
/** Manifest a ConfigReader for `Quantity[V, U]` */
implicit def coulombQuantityConfigReader[V, U](implicit
ovr: NoImplicit[CoulombPureconfigOverride[V]],
qcr: ConfigReader[ConfigQuantity[V]],
qp: QuantityParser,
ntt: WeakTypeTag[V],
qtt: WeakTypeTag[Quantity[V, U]],
uts: UnitTypeString[U]
): ConfigReader[Quantity[V, U]] = new ConfigReader[Quantity[V, U]] {
def from(cur: ConfigCursor): Either[ConfigReaderFailures, Quantity[V, U]] = {
qcr.from(cur) match {
case Left(readFailure) => Left(readFailure)
case Right(cq @ ConfigQuantity(value, unit)) => {
qp.applyUnitExpr[V, U](value, unit) match {
case Success(q) => Right(q)
case Failure(_) => Left(ConfigReaderFailures(ConvertFailure(
reason = CannotConvert(
value = s"$cq",
toType = qtt.tpe.toString,
because = s"Failed to parse ($value, $unit) ==> ${uts.expr}"),
cur = cur)))
}
}
}
}
}
}