--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nashorn/samples/find_nonfinals.js	Tue Aug 19 18:14:45 2014 +0530
@@ -0,0 +1,87 @@
+/*
+ * 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.
+ */
+
+/**
+ * Nashorn project uses "final" modifier for method parameters
+ * (like 'val' of Scala). This tool finds method parameters that
+ * miss final modifier.
+ */
+
+// Usage: jjs -J-Djava.ext.dirs=<your_nashorn_jar_dir> find_nonfinals.js
+
+var Class = Java.type("java.lang.Class");
+var System = Java.type("java.lang.System");
+var File = Java.type("java.io.File");
+var JarFile = Java.type("java.util.jar.JarFile");
+var Modifier = Java.type("java.lang.reflect.Modifier");
+
+// locate nashorn.jar from java.ext.dirs
+function findNashorn() {
+    var paths = System.getProperty("java.ext.dirs").split(':');
+    for each (var p in paths) {
+        var nashorn = p + File.separator + "nashorn.jar";
+        if (new File(nashorn).exists()) {
+            return nashorn;
+        }
+    }
+}
+
+// analyze a single Class and print info on non-final parameters
+function analyzeClass(cls) {
+    var methods = cls.getDeclaredMethods();
+    for each (var method in methods) {
+        // this requires -parameters option when compiling java sources
+        var params = method.parameters;
+        for each (var p in params) {
+           var modifiers = p.modifiers;
+           if (!Modifier.isFinal(modifiers)) {
+               if (! method.name.startsWith("access$")) {
+                   print(method);
+                   print(" ->", p);
+               }
+           }
+        }
+    }
+}
+
+var jarFile = findNashorn();
+// load each class and use reflection to analyze each Class
+new JarFile(jarFile).stream().forEach(
+    function(entry) {
+        var name = entry.name;
+        if (name.endsWith(".class")) {
+            var clsName = name.substring(0, name.lastIndexOf('.class'));
+            clsName = clsName.replace(/\//g, '.');
+            var cls = Class.forName(clsName);
+            analyzeClass(cls);
+        }
+    }
+)