/**
* The MIT License (MIT)
*
* Copyright (c) 2013-2015 Andrew Snare, Age Mooij
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package gh
import spray.json._
/**
* A custom version of the Spray DefaultJsonProtocol with a modified field naming strategy
*/
trait SnakifiedSprayJsonSupport extends DefaultJsonProtocol {
import reflect._
/**
* This is the most important piece of code in this object!
* It overrides the default naming scheme used by spray-json and replaces it with a scheme that turns camelcased
* names into snakified names (i.e. using underscores as word separators).
*/
override protected def extractFieldNames(classTag: ClassTag[_]) = {
import java.util.Locale
def snakify(name: String) = {
val pass1 = """([A-Z]+)([A-Z][a-z])""".r.replaceAllIn(name, "$1_$2")
val pass2 = """([a-z\d])([A-Z])""".r.replaceAllIn(pass1, "$1_$2")
pass2.toLowerCase(Locale.US)
}
super.extractFieldNames(classTag).map{ snakify(_) }
}
}
object SnakifiedSprayJsonSupport extends SnakifiedSprayJsonSupport
