#// Usage: jjs find_nonfinals2.js -- <directory>

/*

 * 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.

 */

// This example demonstrates Java subclassing by Java.extend

// and javac Compiler and Tree API. This example finds method

// parameters without "final" keyword and prints info on those.

if (arguments.length == 0) {

    print("Usage: jjs find_nonfinals2.js -- <directory>");

    exit(1);

}

// Java types used

var File = Java.type("java.io.File");

var Files = Java.type("java.nio.file.Files");

var StringArray = Java.type("java.lang.String[]");

var ToolProvider = Java.type("javax.tools.ToolProvider");

var Tree = Java.type("com.sun.source.tree.Tree");

var TreeScanner = Java.type("com.sun.source.util.TreeScanner");

var Modifier = Java.type("javax.lang.model.element.Modifier");

function checkNonFinalParams(p) {

    // get the system compiler tool

    var compiler = ToolProvider.systemJavaCompiler;

    // get standard file manager

    var fileMgr = compiler.getStandardFileManager(null, null, null);

    // Using Java.to convert script array (arguments) to a Java String[]

    var compUnits = fileMgr.getJavaFileObjects(

        Java.to(arguments, StringArray));

    // create a new compilation task

    var task = compiler.getTask(null, fileMgr, null, null, null, compUnits);

    // subclass SimpleTreeVisitor - to find non-final method params

    var NonFinalsFinder = Java.extend(TreeScanner);

    function printMethod(method) {

        print(method.modifiers + " "+ method.returnType + " " +

            method.name + "(" + method.parameters + ")");

    }

    var pkgName, clsName, compUnitName, lineMap;

    var visitor = new NonFinalsFinder() {

        visitCompilationUnit: function(compUnit, p) {

            pkgName = compUnit.packageName;

            compUnitName = compUnit.sourceFile.name;

            lineMap = compUnit.lineMap;

            return Java.super(visitor).visitCompilationUnit(compUnit, p);

        },

        visitClass: function(clazz, p) {

            clsName = clazz.name;

            return Java.super(visitor).visitClass(clazz, p);

        },

        visitMethod: function (method, p) {

            var params = method.parameters;

            for each (var p in params) {

                var modifiers = p.modifiers;

                if (! modifiers.flags.contains(Modifier.FINAL)) {

                    print(compUnitName);

                    print(pkgName + "." + clsName);

                    printMethod(method);

                    print("->", p,

                     " @ " + lineMap.getLineNumber(p.pos) + ":" +

                           lineMap.getColumnNumber(p.pos));

                }

            }

        }

    }

    for each (var cu in task.parse()) {

        cu.accept(visitor, null);

    }

}

// for each ".java" file in directory (recursively).

function main(dir) {

    var totalCount = 0;

    Files.walk(dir.toPath()).

      forEach(function(p) {

        var name = p.toFile().absolutePath;

        if (name.endsWith(".java")) {

            checkNonFinalParams(p);

        }

      });

}

main(new File(arguments[0]));