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import scala.math
import scala.util.parsing.json.JSON
import com.twitter.scalding._
import com.twitter.scalding.typed.TDsl._
case class MapFeatures(val key : String, slug : String, json : String)
case class ReduceFeatures(json : String)
case class ReduceOutput(val score : Int, json1 : String, json2 : String)
abstract class Scorable {
def getInputPipe(args : Args) : TypedPipe[(String, ReduceFeatures)] =
{
getFeaturesPipe(args)
.filter { entry => Scorable.isValidSlug(entry.slug) }
.groupBy { case MapFeatures(key, slug, json) => slug }
.map { tuple =>
val (slug : String, features : MapFeatures) = tuple
(slug, ReduceFeatures(features.json))
}
}
// abstract method
def getFeaturesPipe(args : Args) : TypedPipe[MapFeatures]
}
object Scorable {
val NoSlug = "NO SLUG" // Used for slug if title is empty or unparseable
def isValidSlug(slug : String) = {
slug != NoSlug
}
def jsonToMap(json : String) : Option[Map[String, Any]] = {
// https://stackoverflow.com/a/32717262/631051
val jsonObject = JSON.parseFull(json)
if (jsonObject == None) {
None
} else {
Some(jsonObject.get.asInstanceOf[Map[String, Any]])
}
}
/*
def grobidToSlug(json : String) : Option[String] = {
jsonToMap(json) match {
case None => None
case Some(map) => {
if (map contains "title") {
titleToSlug(getString(map, "title"))
} else {
None
}
}
}
}
def crossrefToSlug(json : String) : Option[String] = {
jsonToMap(json) match {
case None => None
case Some(map) => {
if (map contains "title") {
// TODO: Stop ignoring secondary titles
titleToSlug(map("title").asInstanceOf[List[String]](0))
} else {
None
}
}
}
}
*/
def titleToSlug(title : String) : String = {
val slug = StringUtilities.removeAccents(title).split(":")(0).toLowerCase()
if (slug.isEmpty) {
NoSlug
} else {
slug
}
}
def getStringOption(optionalMap : Option[Map[String, Any]], key : String)
: Option[String] = {
optionalMap match {
case None => None
case Some(map) => if (map contains key) Some(map(key).asInstanceOf[String]) else None
}
}
// Caller is responsible for ensuring that key is in map.
def getString(map : Map[String, String], key : String) : String = {
assert(map contains key)
map(key).asInstanceOf[String]
}
val MaxScore = 1000
def computeOutput(feature1 : ReduceFeatures, feature2 : ReduceFeatures) :
ReduceOutput = {
val json1 = jsonToMap(feature1.json)
val json2 = jsonToMap(feature2.json)
getStringOption(json1, "title") match {
case None => ReduceOutput(0, "No title", feature1.json)
case Some(title1) => {
getStringOption(json2, "title") match {
case None => ReduceOutput(0, "No title", feature2.json)
case Some(title2) =>
ReduceOutput(
(StringUtilities.similarity(title1, title2) * MaxScore).toInt,
feature1.json, feature2.json)
}
}
}
}
}
|
