export nquads

exporter/exporter.go

@@ -23,6 +23,25 @@ func (exp *Exporter) Count() int32 {
 	return exp.count
 }
 
+func (exp *Exporter) ExportNquad() {
+	it := exp.qstore.QuadsAllIterator()
+	for graph.Next(it) {
+		exp.count++
+		quad := exp.qstore.Quad(it.Result())
+		
+		exp.WriteEscString(quad.Subject)
+		exp.Write(" ")
+		exp.WriteEscString(quad.Predicate)
+		exp.Write(" ")
+		exp.WriteEscString(quad.Object)
+		if quad.Label != "" {
+			exp.Write(" ")
+			exp.WriteEscString(quad.Label)
+		}
+		exp.Write(" .\n")
+	} 
+}
+
 func (exp *Exporter) ExportJson() {
 	var jstr []byte 
 	exp.Write("[")

internal/dump.go

@@ -28,7 +28,19 @@ func Dump(qs graph.QuadStore, outFile, typ string) error {
 	if export.Err() != nil {
 		return export.Err()
 	}
-	export.ExportJson()
+
+	switch typ {
+	case "nquad":
+		export.ExportNquad()
+	case "json":
+		export.ExportJson()
+	default:
+		return fmt.Errorf("unknown format %q", typ)
+	}
+	
+	if export.Err() != nil {
+		return export.Err()
+	}
 
         if outFile != "-" {
 		fmt.Printf("%d entries were written\n", export.Count())