org.apache.spark.sql.delta.util.JsonUtils.scala Maven / Gradle / Ivy
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/*
* Copyright (2020) The Delta Lake Project Authors.
*
* 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 org.apache.spark.sql.delta.util
import com.fasterxml.jackson.annotation.JsonInclude.Include
import com.fasterxml.jackson.databind.{ DeserializationFeature, ObjectMapper }
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper
/** Useful json functions used around the Delta codebase. */
object JsonUtils {
/** Used to convert between classes and JSON. */
val mapper = new ObjectMapper with ScalaObjectMapper
mapper.setSerializationInclusion(Include.NON_ABSENT)
mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
mapper.registerModule(DefaultScalaModule)
def toJson[T: Manifest](obj: T): String = {
mapper.writeValueAsString(obj)
}
def toPrettyJson[T: Manifest](obj: T): String = {
mapper.writerWithDefaultPrettyPrinter().writeValueAsString(obj)
}
def fromJson[T: Manifest](json: String): T = {
mapper.readValue[T](json)
}
}