com.github.kardapoltsev.json4s.javatime.TimeSerializer.scala Maven / Gradle / Ivy

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/*
 * Copyright 2016 com.github.kardapoltsev
 *
 * 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 com.github.kardapoltsev.json4s.javatime

import java.time.format.{DateTimeFormatter, DateTimeParseException}
import java.time.temporal.{TemporalAccessor, TemporalQuery}

import org.json4s.{Formats, JValue, MappingException, Serializer, TypeInfo}
import org.json4s.JsonAST.JString

abstract class TimeSerializer[A <: TemporalAccessor](implicit manifest: Manifest[A])
    extends Serializer[A] {

  private val Class = manifest.runtimeClass
  protected def format: DateTimeFormatter
  protected def temporalQuery: TemporalQuery[A]

  def deserialize(implicit ft: Formats): PartialFunction[(TypeInfo, JValue), A] = {
    case (TypeInfo(Class, _), JString(s)) =>
      try {
        format.parse(s, temporalQuery)
      } catch {
        case e: DateTimeParseException =>
          throw MappingException("Can't convert `" + s + "' to " + Class, e)
      }
  }

  def serialize(implicit fmt: Formats): PartialFunction[Any, JValue] = {
    case v: A => JString(format.format(v))
  }

  protected def asQuery(f: TemporalAccessor => A): TemporalQuery[A] = {
    new TemporalQuery[A] {

      override def queryFrom(temporal: TemporalAccessor): A = f(temporal)
    }
  }

}