1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * - Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * - Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * - Neither the name of Oracle nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /** 33 * Nashorn project uses "final" modifier for method parameters 34 * (like 'val' of Scala). This tool finds method parameters that 35 * miss final modifier. 36 */ 37 38 // Usage: jjs -J-Djava.ext.dirs=<your_nashorn_jar_dir> find_nonfinals.js 39 40 var Class = Java.type("java.lang.Class"); 41 var System = Java.type("java.lang.System"); 42 var File = Java.type("java.io.File"); 43 var JarFile = Java.type("java.util.jar.JarFile"); 44 var Modifier = Java.type("java.lang.reflect.Modifier"); 45 46 // locate nashorn.jar from java.ext.dirs 47 function findNashorn() { 48 var paths = System.getProperty("java.ext.dirs").split(':'); 49 for each (var p in paths) { 50 var nashorn = p + File.separator + "nashorn.jar"; 51 if (new File(nashorn).exists()) { 52 return nashorn; 53 } 54 } 55 } 56 57 // analyze a single Class and print info on non-final parameters 58 function analyzeClass(cls) { 59 var methods = cls.getDeclaredMethods(); 60 for each (var method in methods) { 61 // this requires -parameters option when compiling java sources 62 var params = method.parameters; 63 for each (var p in params) { 64 var modifiers = p.modifiers; 65 if (!Modifier.isFinal(modifiers)) { 66 if (! method.name.startsWith("access$")) { 67 print(method); 68 print(" ->", p); 69 } 70 } 71 } 72 } 73 } 74 75 var jarFile = findNashorn(); 76 // load each class and use reflection to analyze each Class 77 new JarFile(jarFile).stream().forEach( 78 function(entry) { 79 var name = entry.name; 80 if (name.endsWith(".class")) { 81 var clsName = name.substring(0, name.lastIndexOf('.class')); 82 clsName = clsName.replace(/\//g, '.'); 83 var cls = Class.forName(clsName); 84 analyzeClass(cls); 85 } 86 } 87 )