Remove references to deprecated PolyglotEngine from examples

documentation/tutorials/debugging/InteropDebugging/R/main.r

 #
-# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -34,7 +34,6 @@ clazz <- new.java.class("com.oracle.truffle.r.JavaMessage")
 obj <- new.external(clazz, "Hi there")
 print(obj$getMessage())
 
-JS_MIME_TYPE <- "application/javascript"
-eval.external(JS_MIME_TYPE, source='var s = "Hello from Javascript"; print(s)')
-eval.external(JS_MIME_TYPE, path="JS/main.js")
+eval.external('js', source='var s = "Hello from Javascript"; print(s)')
+eval.external('js', path="JS/main.js")
 

documentation/tutorials/debugging/InteropDebugging/src/com/oracle/truffle/r/Main.java

 /*
- * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,8 +27,8 @@
  */
 package com.oracle.truffle.r;
 
-import com.oracle.truffle.api.source.Source;
-import com.oracle.truffle.api.vm.PolyglotEngine;
+import  org.graalvm.polyglot.Context;
+import  org.graalvm.polyglot.Source;
 import java.io.File;
 import java.io.IOException;
 
@@ -41,17 +41,14 @@ public class Main {
      * @throws java.io.IOException
      */
     public static void main(String[] args) throws IOException {
-        PolyglotEngine newVM = PolyglotEngine.newBuilder().config(R_MIME_TYPE, "debugContext", null).build();
-        newVM.eval(fromString("print('Hello, World! (from string)')"));
-        newVM.eval(fromFile("R/main.r"));
-    }
-    
-    private static Source fromString(String code) {
-        return Source.newBuilder(code).name("<shell_input>").mimeType(R_MIME_TYPE).interactive().build();
+        Context context = Context.create();
+        context.eval("R", "print('Hello, World! (from string)')");
+        context.eval(fromFile("R/main.r"));
     }
+
     
     private static Source fromFile(String path) throws IOException {
-        return Source.newBuilder(new File(path)).mimeType(R_MIME_TYPE).build();
+        return Source.newBuilder("R", new File(path)).build();
     }
     
 }

documentation/tutorials/debugging/tutorial.md

@@ -150,8 +150,8 @@ It is also possible to cross language boundaries during stepping when using the
 
 ### Inter-language Debugging 
 
-File `Main.java` creates a `PolyglotEngine` object that can execute R code. This is basically the FastR engine. 
-The engine object can now run R code by creating a source object (representing R code) and submitting the source to the engine. 
+File `Main.java` creates a `Context` object that can execute R code. This is basically the FastR engine. 
+The engine object can now run R code by creating a source object (representing R code) and submitting the source to the context object. 
 The expression `fromString("print('Hello, World! (from string)')")` creates a source code from a string. 
 Expression `fromFile("R/main.r")` creates source code from file *R/main.r*.