8042600: Add more samples in nashorn/samples directory

Reviewed-by: jlaskey, hannesw

nashorn/samples/engine/interface.js

@@ -0,0 +1,60 @@
+#// Usage: jjs -scripting interface.js
+
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// Example demonstrating how to implement a Java interface
+// whose methods are backed by global script functions
+
+var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");
+// create manager
+var manager = new ScriptEngineManager();
+// create engine
+var engine = manager.getEngineByName("js");
+
+// eval code - too many script escapes?
+// use heredoc !
+engine.eval(<<CODE
+function run() {
+    print("run global function called");
+}
+CODE);
+
+// create Java interface object whose methods are
+// implemented by script functions. This is from
+// javax.script.Invocable. But we are in JS world, 
+// don't worry about types :)
+
+var Runnable = Java.type("java.lang.Runnable");
+var r = engine.getInterface(Runnable.class);
+print(r.class);
+
+r.run();