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package.scala
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package.scala
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/*
* Copyright 2022 Lucas Satabin
*
* 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 fs2
package data.json
import internals._
import cats.syntax.all._
package object codec {
/** Transforms a stream of token into another one. The transformation function `f` is
* called on every selected value from upstream, and the resulting value replaces it.
* The rest of the stream is left unchanged.
*
* This operator locally deserializes the Json values using the [[Deserializer]], and
* returns tokens as emitted by the [[Serializer]] on the resulting value.
*/
def transform[F[_], A, B, Json](selector: Selector, f: A => B)(implicit
F: RaiseThrowable[F],
deserializer: Deserializer.Aux[A, Json],
serializer: Serializer.Aux[B, Json]): Pipe[F, Token, Token] = {
import deserializer.builder
import serializer.tokenizer
TokenSelector
.transformPipe[F, Json, A, B](selector, deserializer.deserialize, f, serializer.serialize(_).some, true)
}
/** Transforms a stream of token into another one. The transformation function `f` is
* called on every selected value from upstream, and the resulting value replaces it.
* If the function returns `None`, then the entire value is dropped (and the object key it
* is located at, if any).
* The rest of the stream is left unchanged.
*
* This operator locally deserializes Json values using the [[Deserializer]], and
* returns tokens as emitted by the [[Serializer]] on the resulting value.
*/
def transformOpt[F[_], A, B, Json](selector: Selector, f: A => Option[B])(implicit
F: RaiseThrowable[F],
deserializer: Deserializer.Aux[A, Json],
serializer: Serializer.Aux[B, Json]): Pipe[F, Token, Token] = {
import deserializer.builder
import serializer.tokenizer
TokenSelector
.transformPipe[F, Json, A, Option[B]](selector, deserializer.deserialize, f, _.map(serializer.serialize), false)
}
/** Transforms a stream of token into another one. The transformation function `f` is
* called on every selected value from upstream, and the resulting value replaces it.
* The rest of the stream is left unchanged. The operation can fail, in case the returned
* `F` is failed at one step.
*
* This operator locally deserializes Json values using the [[Deserializer]], and
* returns tokens as emitted by the [[Serializer]] on the resulting value.
*/
def transformF[F[_], A, B, Json](selector: Selector, f: A => F[B])(implicit
F: RaiseThrowable[F],
deserializer: Deserializer.Aux[A, Json],
serializer: Serializer.Aux[B, Json]): Pipe[F, Token, Token] = {
import deserializer.builder
import serializer.tokenizer
TokenSelector
.transformPipeF[F, Json, A, B](selector, deserializer.deserialize, f, serializer.serialize(_).some, true)
}
/** Transforms a stream of token into another one. The transformation function `f` is
* called on every selected value from upstream, and the resulting value replaces it.
* The rest of the stream is left unchanged. The operation can fail, in case the returned
* `F` is failed at one step.
*
* This operator locally deserializes Json values using the [[Deserializer]], and
* returns tokens as emitted by the [[Serializer]] on the resulting value.
*/
def transformOptF[F[_], A, B, Json](selector: Selector, f: A => F[Option[B]])(implicit
F: RaiseThrowable[F],
deserializer: Deserializer.Aux[A, Json],
serializer: Serializer.Aux[B, Json]): Pipe[F, Token, Token] = {
import deserializer.builder
import serializer.tokenizer
TokenSelector
.transformPipeF[F, Json, A, Option[B]](selector, deserializer.deserialize, f, _.map(serializer.serialize), false)
}
/** Transforms a stream of Json tokens into a stream of deserialized values.
*/
def deserialize[F[_], A](implicit F: RaiseThrowable[F], deserializer: Deserializer[A]): Pipe[F, Token, A] = {
import deserializer.builder
_.through(ast.values[F, deserializer.Json]).map(deserializer.deserialize).rethrow
}
/** Transforms a stream of values into a stream of Json tokens.
*
* This operation is the opposite of `deserialize`.
*/
def serialize[F[_], A](implicit serializer: Serializer[A]): Pipe[F, A, Token] = {
import serializer.tokenizer
_.map(serializer.serialize(_)).through(ast.tokenize)
}
}