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package sandcrawler
import scala.math
import scala.util.parsing.json.JSON
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 {
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 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")
if (doi.isEmpty || doi == null) {
MapFeatures(Scorable.NoSlug, json)
} else {
val sf : ScorableFeatures = ScorableFeatures.create(title=title, doi=doi)
MapFeatures(sf.toSlug, sf.toString)
}
}
}
}
}
}
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