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package sandcrawler
import scala.math
import scala.util.parsing.json.JSON
import scala.util.parsing.json.JSONArray
import scala.util.parsing.json.JSONObject
import cascading.flow.FlowDef
import cascading.tuple.Fields
import com.twitter.scalding._
import com.twitter.scalding.typed.TDsl._
import parallelai.spyglass.hbase.HBasePipeConversions
class CrossrefScorable extends Scorable with HBasePipeConversions {
// TODO: Generalize args so there can be multiple Crossref pipes in one job.
def getSource(args : Args) : Source = {
TextLine(args("crossref-input"))
}
def getFeaturesPipe(args : Args)(implicit mode : Mode, flowDef : FlowDef) : TypedPipe[MapFeatures] = {
getSource(args).read
.toTypedPipe[String](new Fields("line"))
.filter { CrossrefScorable.keepRecord(_) }
.map { CrossrefScorable.jsonToMapFeatures(_) }
}
}
object CrossrefScorable {
val ContentTypeWhitelist: Set[String] = Set(
"book",
"book-chapter",
"dataset",
"dissertation",
"journal-article",
"letter",
"monograph",
"posted-content",
"pre-print",
"proceedings-article",
"report",
"working-paper")
def keepRecord(json : String) : Boolean = {
Scorable.jsonToMap(json) match {
case None => false
case Some(map) => {
mapToTitle(map) match {
case None => false
case Some(title) => title.length <= Scorable.MaxTitleLength
}
}
}
}
// Returns None if title is null, empty, or too long.
def mapToTitle(map : Map[String, Any]) : Option[String] = {
if (map contains "title") {
val titles = map("title").asInstanceOf[List[String]]
if (titles.isEmpty || titles == null) {
None
} else {
val title = titles(0)
if (title == null || title.isEmpty || title.length > Scorable.MaxTitleLength) None else Some(title)
}
} else {
None
}
}
def mapToAuthorList(map : Map[String, Any]) : List[String] = {
if (map contains "author") {
val objArray = map("author").asInstanceOf[List[Any]].map(e => e.asInstanceOf[Map[String,Any]])
// TODO(bnewbold): combine given and family names?
objArray
.filter(e => e contains "family")
.map(e => e.get("family").get.asInstanceOf[String])
} else {
List()
}
}
def mapToYear(map : Map[String, Any]) : Option[Int] = {
map.get("created") match {
case None => None
case Some(created) => {
Some(created.asInstanceOf[Map[String,Any]]
.get("date-parts")
.get
.asInstanceOf[List[Any]](0)
.asInstanceOf[List[Any]](0)
.asInstanceOf[Double]
.toInt)
}
}
}
def jsonToMapFeatures(json : String) : MapFeatures = {
Scorable.jsonToMap(json) match {
case None => MapFeatures(Scorable.NoSlug, json)
case Some(map) =>
mapToTitle(map) match {
case None => MapFeatures(Scorable.NoSlug, json)
case Some(title) => {
val doi = Scorable.getString(map, "DOI")
val authors: List[String] = mapToAuthorList(map)
val year: Int = mapToYear(map).getOrElse(0)
val contentType: String = map.get("type").map(e => e.asInstanceOf[String]).getOrElse("MISSING-CONTENT-TYPE")
if (doi.isEmpty || doi == null || authors.length == 0 || !(ContentTypeWhitelist contains contentType)) {
MapFeatures(Scorable.NoSlug, json)
} else {
val sf : ScorableFeatures = ScorableFeatures.create(title=title, authors=authors, doi=doi.toLowerCase(), year=year)
MapFeatures(sf.toSlug, sf.toString)
}
}
}
}
}
}
|
