/*+
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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.+
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 *+
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 * Redistribution and use in source and binary forms, with or without+
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 * modification, are permitted provided that the following conditions+
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 * are met:+
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 *+
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 *   - Redistributions of source code must retain the above copyright+
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 *     notice, this list of conditions and the following disclaimer.+
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 *+
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 *   - Redistributions in binary form must reproduce the above copyright+
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 *     notice, this list of conditions and the following disclaimer in the+
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 *     documentation and/or other materials provided with the distribution.+
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 *+
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 *   - Neither the name of Oracle nor the names of its+
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 *     contributors may be used to endorse or promote products derived+
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 *     from this software without specific prior written permission.+
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 *+
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS+
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 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,+
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 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR+
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR+
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,+
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,+
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR+
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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF+
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING+
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 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS+
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.+
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 */+
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+
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/**+
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 * Nashorn project uses "final" modifier for method parameters+
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 * (like 'val' of Scala). This tool finds method parameters that+
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 * miss final modifier.+
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 */+
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+
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// Usage: jjs -J-Djava.ext.dirs=<your_nashorn_jar_dir> find_nonfinals.js+
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+
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var Class = Java.type("java.lang.Class");+
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var System = Java.type("java.lang.System");+
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var File = Java.type("java.io.File");+
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var JarFile = Java.type("java.util.jar.JarFile");+
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var Modifier = Java.type("java.lang.reflect.Modifier");+
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+
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// locate nashorn.jar from java.ext.dirs+
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function findNashorn() {+
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    var paths = System.getProperty("java.ext.dirs").split(File.pathSeparator);+
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    for each (var p in paths) {+
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        var nashorn = p + File.separator + "nashorn.jar";+
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        if (new File(nashorn).exists()) {+
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            return nashorn;+
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        }+
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    }+
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}+
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+
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// analyze a single Class and print info on non-final parameters+
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function analyzeClass(cls) {+
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    var methods = cls.getDeclaredMethods();+
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    for each (var method in methods) {+
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        // this requires -parameters option when compiling java sources+
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        var params = method.parameters;+
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        for each (var p in params) {+
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           var modifiers = p.modifiers;+
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           if (!Modifier.isFinal(modifiers)) {+
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               if (! method.name.startsWith("access$")) {+
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                   print(method);+
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                   print(" ->", p);+
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               }+
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           }+
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        }+
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    }+
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}+
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+
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var jarFile = findNashorn();+
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// load each class and use reflection to analyze each Class+
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new JarFile(jarFile).stream().forEach(+
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    function(entry) {+
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        var name = entry.name;+
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        if (name.endsWith(".class")) {+
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            var clsName = name.substring(0, name.lastIndexOf('.class'));+
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            clsName = clsName.replace(/\//g, '.');+
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            var cls = Class.forName(clsName);+
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            analyzeClass(cls);+
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        }+
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    }+
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)+
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