Mercurial > jdk8-mips64-public > nashorn / file revision

 #// 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 FileVisitOption = Java.type("java.nio.file.FileVisitOption");

 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(), FileVisitOption.FOLLOW_LINKS).

       forEach(function(p) {

         var name = p.toFile().absolutePath;

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

             checkNonFinalParams(p);

         }

       });

 }

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