OAF-store-graph mdstores: firther fix for PR#180

dhp-workflows/dhp-graph-mapper/src/main/scala/eu/dnetlib/dhp/oa/graph/raw/CopyHdfsOafSparkApplication.scala

@@ -48,26 +48,27 @@ object CopyHdfsOafSparkApplication {
     log.info("hdfsPath: {}", hdfsPath)
 
     implicit val oafEncoder: Encoder[Oaf] = Encoders.kryo[Oaf]
-    import spark.implicits._
 
     val paths = DHPUtils.mdstorePaths(mdstoreManagerUrl, mdFormat, mdLayout, mdInterpretation, true).asScala
 
     val validPaths: List[String] = paths.filter(p => HdfsSupport.exists(p, sc.hadoopConfiguration)).toList
 
+    val types = ModelSupport.oafTypes.entrySet
+      .asScala
+      .map(e => Tuple2(e.getKey, e.getValue))
+
     if (validPaths.nonEmpty) {
-      val oaf = spark.read.load(validPaths: _*).as[String]
+      val oaf = spark.read.textFile(validPaths: _*)
       val mapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
-      val l = ModelSupport.oafTypes.entrySet.asScala.toList
-      l.foreach(
-        e =>
-          oaf
-            .filter(o => isOafType(o, e.getKey))
-            .map(j => mapper.readValue(j, e.getValue).asInstanceOf[Oaf])
+
+      types.foreach(t => oaf
+          .filter(o => isOafType(o, t._1))
+          .map(j => mapper.readValue(j, t._2).asInstanceOf[Oaf])
           .map(s => mapper.writeValueAsString(s))(Encoders.STRING)
           .write
           .option("compression", "gzip")
           .mode(SaveMode.Append)
-            .text(s"$hdfsPath/${e}")
+          .text(s"$hdfsPath/${t._1}")
       )
     }
   }