ConsoleEngine: implemented invoke() method

builtins/src/main/java/org/jline/builtins/ConsoleEngineImpl.java

@@ -373,6 +373,21 @@ public Object execute(String command, String[] args) throws Exception {
         return out;
     }
 
+    @Override
+    public Object invoke(String command, Object... args) throws Exception {
+        Object out = null;
+        if (command.equals("prnt")) {
+            invokePrnt(args);
+        } else {
+            String[] _args = new String[args.length];
+            for (int i = 0; i < args.length; i++) {
+                _args[i] = args[i].toString();
+            }
+            out = execute(command, _args);
+        }
+        return out;
+    }
+
     @SuppressWarnings("unchecked")
     private Map<String,Object> defaultPrntOptions() {
         Map<String, Object> out = new HashMap<>();
@@ -403,6 +418,7 @@ public void println(Map<String, Object> options, Object object) {
                 as.println(terminal);
             }
         }
+        terminal.flush();
     }
 
     private void highlight(int width, String style, String object) {

builtins/src/test/script/init.jline

@@ -6,7 +6,8 @@ array=[0,1]
 
 array.each {
     println it
-    :show
+    resp=:show
+    :prnt $resp
 }
 
 println $1

groovy/src/test/script/hello.groovy

@@ -1,6 +1,10 @@
+import org.jline.builtins.SystemRegistry
+
 class HelloWorld {
     static void hello(def who) {
-       println "hello $who!"
+        println "hello $who!"
+        def map = [user:'pippo',age:10]
+        SystemRegistry.get().invoke('prnt', '-s', 'JSON', map)
     }       
 }