From 10e80025fc0883c5660b2b7ac2ec368bf38d0736 Mon Sep 17 00:00:00 2001
From: Benjamin Winterberg <winterbe@gmail.com>
Date: Tue, 13 Jan 2015 15:43:27 +0100
Subject: [PATCH] Add another nashorn sample of dynamically invoking java code
 at runtime

---
 src/com/winterbe/java8/Nashorn7.java | 43 ++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 src/com/winterbe/java8/Nashorn7.java

diff --git a/src/com/winterbe/java8/Nashorn7.java b/src/com/winterbe/java8/Nashorn7.java
new file mode 100644
index 0000000..c753dbc
--- /dev/null
+++ b/src/com/winterbe/java8/Nashorn7.java
@@ -0,0 +1,43 @@
+package com.winterbe.java8;
+
+import javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptException;
+
+/**
+ * @author Benjamin Winterberg
+ */
+public class Nashorn7 {
+
+    public static class Person {
+        private String name;
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+
+        public int getLengthOfName() {
+            return name.length();
+        }
+    }
+
+    public static void main(String[] args) throws ScriptException, NoSuchMethodException {
+        ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
+        engine.eval("function foo(predicate, obj) { return !!(eval(predicate)); };");
+
+        Invocable invocable = (Invocable) engine;
+
+        Person person = new Person();
+        person.setName("Hans");
+
+        String predicate = "obj.getLengthOfName() >= 4";
+        Object result = invocable.invokeFunction("foo", predicate, person);
+        System.out.println(result);
+    }
+
+}
-- 
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