/
BasicReaders.scala
213 lines (169 loc) · 6.97 KB
/
BasicReaders.scala
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package pureconfig
import java.io.File
import java.math.{BigInteger, BigDecimal => JavaBigDecimal}
import java.net.{URI, URL}
import java.nio.file.{Path, Paths}
import java.time._
import java.time.{Duration => JavaDuration}
import java.util.UUID
import java.util.regex.Pattern
import scala.concurrent.duration.{Duration, FiniteDuration}
import scala.math.{BigDecimal, BigInt}
import scala.reflect.ClassTag
import scala.util.matching.Regex
import com.typesafe.config._
import pureconfig.ConvertHelpers._
import pureconfig.error._
import scala.util.Try
/**
* Trait containing `ConfigReader` instances for primitive types.
*/
trait PrimitiveReaders {
implicit val stringConfigReader = ConfigReader.fromCursor(_.asString)
implicit val charConfigReader = ConfigReader.fromNonEmptyString[Char](s =>
s.size match {
case 1 => Right(s.charAt(0))
case len => Left(WrongSizeString(1, len))
}
)
implicit val booleanConfigReader = ConfigReader.fromCursor(_.asBoolean)
implicit val doubleConfigReader = ConfigReader.fromCursor({ cur =>
val asStringReader = catchReadError({
case v if v.last == '%' => v.dropRight(1).toDouble / 100f
case v => v.toDouble
})
cur.asString.right.flatMap(s => cur.scopeFailure(asStringReader(s))).left.flatMap(_ => cur.asDouble)
})
implicit val floatConfigReader = ConfigReader.fromCursor({ cur =>
val asStringReader = catchReadError({
case v if v.last == '%' => v.dropRight(1).toFloat / 100f
case v => v.toFloat
})
cur.asString.right.flatMap(s => cur.scopeFailure(asStringReader(s))).left.flatMap(_ => cur.asFloat)
})
implicit val intConfigReader = ConfigReader.fromCursor(_.asInt)
implicit val longConfigReader = ConfigReader.fromCursor(_.asLong)
implicit val shortConfigReader = ConfigReader.fromCursor(_.asShort)
implicit val byteConfigReader = ConfigReader.fromCursor(_.asByte)
}
/**
* Trait containing `ConfigReader` instance for Java Enums.
*/
trait JavaEnumReader {
implicit def javaEnumReader[A <: Enum[A]](implicit tag: ClassTag[A]): ConfigReader[A] =
ConfigReader.fromString(catchReadError(s => {
val enumClass = tag.runtimeClass.asInstanceOf[Class[A]]
Enum.valueOf(enumClass, s)
}))
}
/**
* Trait containing `ConfigReader` instances for classes related to file system paths and URIs.
*/
trait UriAndPathReaders {
implicit val urlConfigReader = ConfigReader.fromNonEmptyString[URL](catchReadError(new URL(_)))
implicit val uuidConfigReader = ConfigReader.fromNonEmptyString[UUID](catchReadError(UUID.fromString))
implicit val pathConfigReader = ConfigReader.fromString[Path](catchReadError(Paths.get(_)))
implicit val fileConfigReader = ConfigReader.fromString[File](catchReadError(new File(_)))
implicit val uriConfigReader = ConfigReader.fromString[URI](catchReadError(new URI(_)))
}
/**
* Trait containing `ConfigReader` instances for classes related to regular expressions.
*/
trait RegexReaders {
implicit val patternReader = ConfigReader.fromString[Pattern](catchReadError(Pattern.compile))
implicit val regexReader = ConfigReader.fromString[Regex](catchReadError(new Regex(_)))
}
/**
* Trait containing `ConfigReader` instances for `java.time` classes.
*/
trait JavaTimeReaders {
implicit val instantConfigReader: ConfigReader[Instant] =
ConfigReader.fromNonEmptyString[Instant](catchReadError(Instant.parse))
implicit val zoneOffsetConfigReader: ConfigReader[ZoneOffset] =
ConfigReader.fromNonEmptyString[ZoneOffset](catchReadError(ZoneOffset.of))
implicit val zoneIdConfigReader: ConfigReader[ZoneId] =
ConfigReader.fromNonEmptyString[ZoneId](catchReadError(ZoneId.of))
implicit val periodConfigReader: ConfigReader[Period] =
ConfigReader.fromNonEmptyString[Period](PeriodUtils.fromString)
implicit val javaDurationConfigReader: ConfigReader[JavaDuration] =
ConfigReader.fromNonEmptyString[JavaDuration](catchReadError(JavaDuration.parse))
implicit val yearConfigReader: ConfigReader[Year] =
ConfigReader.fromNonEmptyString[Year](catchReadError(Year.parse))
}
/**
* Trait containing `ConfigReader` instances for [[scala.concurrent.duration.Duration]] and
* [[scala.concurrent.duration.FiniteDuration]].
*/
trait DurationReaders {
implicit val durationConfigReader: ConfigReader[Duration] =
ConfigReader.fromNonEmptyString[Duration](DurationUtils.fromString)
implicit val finiteDurationConfigReader: ConfigReader[FiniteDuration] = {
val fromString: String => Either[FailureReason, FiniteDuration] = { string =>
DurationUtils.fromString(string).right.flatMap {
case d: FiniteDuration => Right(d)
case _ =>
Left(
CannotConvert(
string,
"FiniteDuration",
s"Couldn't parse '$string' into a FiniteDuration because it's infinite."
)
)
}
}
ConfigReader.fromNonEmptyString[FiniteDuration](fromString)
}
}
/**
* Trait containing `ConfigReader` instances for Java and Scala arbitrary-precision numeric types.
*/
trait NumericReaders {
implicit val javaBigIntegerReader: ConfigReader[BigInteger] =
ConfigReader.fromNonEmptyString[BigInteger](catchReadError(new BigInteger(_)))
implicit val javaBigDecimalReader: ConfigReader[JavaBigDecimal] =
ConfigReader.fromNonEmptyString[JavaBigDecimal](catchReadError(new JavaBigDecimal(_)))
implicit val scalaBigIntReader: ConfigReader[BigInt] =
ConfigReader.fromNonEmptyString[BigInt](catchReadError(BigInt(_)))
implicit val scalaBigDecimalReader: ConfigReader[BigDecimal] =
ConfigReader.fromNonEmptyString[BigDecimal](catchReadError(BigDecimal(_)))
}
/**
* Trait containing `ConfigReader` instances for Typesafe config models.
*/
trait TypesafeConfigReaders {
implicit val configConfigReader: ConfigReader[Config] =
ConfigReader.fromCursor(_.asObjectCursor.right.map(_.value.toConfig))
implicit val configObjectConfigReader: ConfigReader[ConfigObject] =
ConfigReader.fromCursor(_.asObjectCursor.right.map(_.value))
implicit val configValueConfigReader: ConfigReader[ConfigValue] =
ConfigReader.fromCursor(c => Right(c.value))
implicit val configListConfigReader: ConfigReader[ConfigList] =
ConfigReader.fromCursor(_.asListCursor.right.map(_.value))
implicit val configMemorySizeReader: ConfigReader[ConfigMemorySize] =
ConfigReader
.fromCursor { cur =>
cur scopeFailure {
ConvertHelpers.tryToEither {
Try {
val wrapped = cur.value.atKey("_")
val bytes = wrapped.getBytes("_").longValue()
ConfigMemorySize ofBytes bytes
}
}
}
}
}
/**
* Trait containing `ConfigReader` instances for primitive types and simple classes in Java and Scala standard
* libraries.
*/
trait BasicReaders
extends PrimitiveReaders
with JavaEnumReader
with UriAndPathReaders
with RegexReaders
with JavaTimeReaders
with DurationReaders
with NumericReaders
with TypesafeConfigReaders
object BasicReaders extends BasicReaders