pass js objects to java and work with properties and members on java side

winterbe · winterbe · commit 3d559e52ad59 · 2014-03-31T18:08:45.000+02:00
diff --git a/res/nashorn2.js b/res/nashorn2.js
@@ -1,3 +1,29 @@
 var Nashorn2 = Java.type('com.winterbe.java8.Nashorn2');
 var result = Nashorn2.fun('John Doe');
-print('\n' + result);
+print('\n' + result);
+
+Nashorn2.fun2(new Date());
+Nashorn2.fun2(new RegExp());
+Nashorn2.fun2({foo: 'bar'});
+
+
+print('passing object hash:');
+Nashorn2.fun3({
+    foo: 'bar',
+    bar: 'foo'
+});
+
+
+print('passing custom person object:');
+
+function Person(firstName, lastName) {
+    this.firstName = firstName;
+    this.lastName = lastName;
+    this.getFullName = function() {
+        return this.firstName + " " + this.lastName;
+    }
+}
+
+var person1 = new Person("Peter", "Parker");
+Nashorn2.fun3(person1);
+Nashorn2.fun4(person1);
diff --git a/src/com/winterbe/java8/Nashorn2.java b/src/com/winterbe/java8/Nashorn2.java
@@ -1,8 +1,11 @@
 package com.winterbe.java8;
 
+import jdk.nashorn.api.scripting.ScriptObjectMirror;
+
 import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import java.io.FileReader;
+import java.util.Arrays;
 
 /**
  * Calling java methods from javascript with nashorn.
@@ -16,6 +19,18 @@ public static String fun(String name) {
         return "greetings from java";
     }
 
+    public static void fun2(Object object) {
+        System.out.println(object.getClass());
+    }
+
+    public static void fun3(ScriptObjectMirror mirror) {
+        System.out.println(mirror.getClassName() + ": " + Arrays.toString(mirror.getOwnKeys(true)));
+    }
+
+    public static void fun4(ScriptObjectMirror person) {
+        System.out.println("Full Name is: " + person.callMember("getFullName"));
+    }
+
     public static void main(String[] args) throws Exception {
         ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
         engine.eval(new FileReader("res/nashorn2.js"));
