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

 #// Usage: jjs javafoovars.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 counts number

 // of variables called "foo" in the given java source files!

 if (arguments.length == 0) {

     print("Usage: jjs javafoovars.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 VariableTree = Java.type("com.sun.source.tree.VariableTree");

 // count "foo"-s in the given .java files

 function countFoo() {

     // 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 count variables called "foo"

     var FooCounterVisitor = Java.extend(TreeScanner);

     var fooCount = 0;

     var visitor = new FooCounterVisitor() {

         visitVariable: function (node, p) {

             if (node.name.toString() == "foo") {

                 fooCount++;

             }

         }

     }

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

         cu.accept(visitor, null);

     }

     return fooCount;

 }

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

 function main(dir) {

     var totalCount = 0;

     Files.walk(dir.toPath()).

       forEach(function(p) {

         var name = p.toFile().absolutePath;

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

             var count = 0;

             try {

                 count = countFoo(p.toFile().getAbsolutePath());

             } catch (e) {

                 print(e);

             }

             if (count != 0) {

                 print(name + ": " + count);

             }

             totalCount += count;

         }

       });

     print("Total foo count: " + totalCount);

 }

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