scala.io.circe.jackson.CirceJsonSerializer.scala Maven / Gradle / Ivy
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/*
* Copyright 2016 circe
*
* 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 io.circe.jackson
import com.fasterxml.jackson.core.JsonGenerator
import com.fasterxml.jackson.databind.JsonSerializer
import com.fasterxml.jackson.databind.SerializerProvider
import io.circe.Json
import io.circe.JsonBigDecimal
import io.circe.JsonBiggerDecimal
import io.circe.JsonDecimal
import io.circe.JsonDouble
import io.circe.JsonFloat
import io.circe.JsonLong
private[jackson] object CirceJsonSerializer extends JsonSerializer[Json] {
import java.math.{ BigDecimal => JBigDecimal, BigInteger }
import com.fasterxml.jackson.databind.node.{ BigIntegerNode, DecimalNode }
override final def serialize(
value: Json,
json: JsonGenerator,
provider: SerializerProvider
): Unit = value match {
case Json.JNumber(v) =>
v match {
case JsonLong(x) => json.writeNumber(x)
case JsonDouble(x) => json.writeNumber(x)
case JsonFloat(x) => json.writeNumber(x)
case JsonDecimal(x) => json.writeString(x)
case JsonBiggerDecimal(_, x) => json.writeString(x)
case JsonBigDecimal(x) =>
// Workaround #3784: Same behaviour as if JsonGenerator were
// configured with WRITE_BIGDECIMAL_AS_PLAIN, but forced as this
// configuration is ignored when called from ObjectMapper.valueToTree
val raw = x.stripTrailingZeros.toPlainString
if (raw.contains(".")) json.writeTree(new DecimalNode(new JBigDecimal(raw)))
else json.writeTree(new BigIntegerNode(new BigInteger(raw)))
}
case Json.JString(v) => json.writeString(v)
case Json.JBoolean(v) => json.writeBoolean(v)
case Json.JArray(elements) => {
json.writeStartArray()
elements.foreach(t => serialize(t, json, provider))
json.writeEndArray()
}
case Json.JObject(values) => {
json.writeStartObject()
values.toList.foreach { t =>
json.writeFieldName(t._1)
serialize(t._2, json, provider)
}
json.writeEndObject()
}
case Json.JNull => json.writeNull()
}
}