[#3] Creating save function to Linked Graph

src/main/scala/br/ufc/insightlab/linkedgraphast/model/graph/LinkedGraph.scala

@@ -1,5 +1,6 @@
 package br.ufc.insightlab.linkedgraphast.model.graph
 
+import java.io.{File, PrintWriter}
 import java.lang
 import java.util.stream.StreamSupport
 
@@ -245,4 +246,18 @@ class LinkedGraph(structure: GraphStructure = new DefaultGraphStructure()) exten
     }
     .mkString("\n")
 
+  def save(filePath: String): Unit = {
+    val wr = new PrintWriter(new File("extracted-schema.nt"))
+
+    this.getLinksAsStream
+      .foreach{
+        case Attribute(s,p,o) =>
+          wr.write(s"<${s.uri}> <${p.uri}> ${fixLiteralString(o.value)} .\n")
+        case Relation(s,p,o) =>
+          wr.write(s"<${s.uri}> <${p.uri}> <${o.uri}> .\n")
+      }
+
+    wr.close()
+  }
+
 }

src/main/scala/br/ufc/insightlab/linkedgraphast/modules/schemaextractor/VirtuosoSchemaExtractor.scala

@@ -11,7 +11,7 @@ import org.slf4j.LoggerFactory
 
 import scala.collection.JavaConverters._
 import scala.concurrent.{Await, Future}
-import scala.concurrent.ExecutionContext.Implicits.global
+
 import scala.concurrent.duration.Duration
 import scala.util.{Failure, Success, Try}
 
@@ -221,8 +221,7 @@ object VirtuosoSchemaExtractor {
     println(graph.getNumberOfNodes)
     println(graph.getNumberOfEdges)
 
-    val wr = new PrintWriter(new File("extracted-schema.nt"))
-    wr.write(graph.toNTriple)
+    graph.save("dbpedia-extracted.nt")
   }