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-rw-r--r--src/main/scala/spray/json/StandardFormats.scala120
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diff --git a/src/main/scala/spray/json/StandardFormats.scala b/src/main/scala/spray/json/StandardFormats.scala
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--- a/src/main/scala/spray/json/StandardFormats.scala
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-/*
- * Original implementation (C) 2009-2011 Debasish Ghosh
- * Adapted and extended in 2011 by Mathias Doenitz
- *
- * 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 spray.json
-
-import scala.{Left, Right}
-
-/**
- * Provides the JsonFormats for the non-collection standard types.
- */
-trait StandardFormats {
- this: AdditionalFormats =>
-
- private[json] type JF[T] = JsonFormat[T] // simple alias for reduced verbosity
-
- implicit def optionFormat[T :JF]: JF[Option[T]] = new OptionFormat[T]
-
- class OptionFormat[T :JF] extends JF[Option[T]] {
- def write(option: Option[T]) = option match {
- case Some(x) => x.toJson
- case None => JsNull
- }
- def read(value: JsValue) = value match {
- case JsNull => None
- case x => Some(x.convertTo[T])
- }
- // allows reading the JSON as a Some (useful in container formats)
- def readSome(value: JsValue) = Some(value.convertTo[T])
- }
-
- implicit def eitherFormat[A :JF, B :JF] = new JF[Either[A, B]] {
- def write(either: Either[A, B]) = either match {
- case Right(a) => a.toJson
- case Left(b) => b.toJson
- }
- def read(value: JsValue) = (value.convertTo(safeReader[A]), value.convertTo(safeReader[B])) match {
- case (Right(a), _: Left[_, _]) => Left(a)
- case (_: Left[_, _], Right(b)) => Right(b)
- case (_: Right[_, _], _: Right[_, _]) => deserializationError("Ambiguous Either value: can be read as both, Left and Right, values")
- case (Left(ea), Left(eb)) => deserializationError("Could not read Either value:\n" + ea + "---------- and ----------\n" + eb)
- }
- }
-
- implicit def tuple1Format[A :JF] = new JF[Tuple1[A]] {
- def write(t: Tuple1[A]) = t._1.toJson
- def read(value: JsValue) = Tuple1(value.convertTo[A])
- }
-
- implicit def tuple2Format[A :JF, B :JF] = new RootJsonFormat[(A, B)] {
- def write(t: (A, B)) = JsArray(t._1.toJson, t._2.toJson)
- def read(value: JsValue) = value match {
- case JsArray(Seq(a, b)) => (a.convertTo[A], b.convertTo[B])
- case x => deserializationError("Expected Tuple2 as JsArray, but got " + x)
- }
- }
-
- implicit def tuple3Format[A :JF, B :JF, C :JF] = new RootJsonFormat[(A, B, C)] {
- def write(t: (A, B, C)) = JsArray(t._1.toJson, t._2.toJson, t._3.toJson)
- def read(value: JsValue) = value match {
- case JsArray(Seq(a, b, c)) => (a.convertTo[A], b.convertTo[B], c.convertTo[C])
- case x => deserializationError("Expected Tuple3 as JsArray, but got " + x)
- }
- }
-
- implicit def tuple4Format[A :JF, B :JF, C :JF, D :JF] = new RootJsonFormat[(A, B, C, D)] {
- def write(t: (A, B, C, D)) = JsArray(t._1.toJson, t._2.toJson, t._3.toJson, t._4.toJson)
- def read(value: JsValue) = value match {
- case JsArray(Seq(a, b, c, d)) => (a.convertTo[A], b.convertTo[B], c.convertTo[C], d.convertTo[D])
- case x => deserializationError("Expected Tuple4 as JsArray, but got " + x)
- }
- }
-
- implicit def tuple5Format[A :JF, B :JF, C :JF, D :JF, E :JF] = {
- new RootJsonFormat[(A, B, C, D, E)] {
- def write(t: (A, B, C, D, E)) = JsArray(t._1.toJson, t._2.toJson, t._3.toJson, t._4.toJson, t._5.toJson)
- def read(value: JsValue) = value match {
- case JsArray(Seq(a, b, c, d, e)) =>
- (a.convertTo[A], b.convertTo[B], c.convertTo[C], d.convertTo[D], e.convertTo[E])
- case x => deserializationError("Expected Tuple5 as JsArray, but got " + x)
- }
- }
- }
-
- implicit def tuple6Format[A :JF, B :JF, C :JF, D :JF, E :JF, F: JF] = {
- new RootJsonFormat[(A, B, C, D, E, F)] {
- def write(t: (A, B, C, D, E, F)) = JsArray(t._1.toJson, t._2.toJson, t._3.toJson, t._4.toJson, t._5.toJson, t._6.toJson)
- def read(value: JsValue) = value match {
- case JsArray(Seq(a, b, c, d, e, f)) =>
- (a.convertTo[A], b.convertTo[B], c.convertTo[C], d.convertTo[D], e.convertTo[E], f.convertTo[F])
- case x => deserializationError("Expected Tuple6 as JsArray, but got " + x)
- }
- }
- }
-
- implicit def tuple7Format[A :JF, B :JF, C :JF, D :JF, E :JF, F: JF, G: JF] = {
- new RootJsonFormat[(A, B, C, D, E, F, G)] {
- def write(t: (A, B, C, D, E, F, G)) = JsArray(t._1.toJson, t._2.toJson, t._3.toJson, t._4.toJson, t._5.toJson, t._6.toJson, t._7.toJson)
- def read(value: JsValue) = value match {
- case JsArray(Seq(a, b, c, d, e, f, g)) =>
- (a.convertTo[A], b.convertTo[B], c.convertTo[C], d.convertTo[D], e.convertTo[E], f.convertTo[F], g.convertTo[G])
- case x => deserializationError("Expected Tuple7 as JsArray, but got " + x)
- }
- }
- }
-
-}