jdk8-mips64-public/nashorn: samples/javafoovars.js@2f1b9f4daec1 (annotated)

samples/javafoovars.js@2f1b9f4daec1 (annotated)

samples/javafoovars.js

Fri, 05 Jun 2015 12:38:53 +0200

author: mhaupt
date: Fri, 05 Jun 2015 12:38:53 +0200
changeset 1398: 2f1b9f4daec1
parent 963: e2497b11a021
child 1531: ab48ce00c634
permissions: -rw-r--r--

8080087: Nashorn $ENV.PWD is originally undefined
Summary: On Windows, the PWD environment variable does not exist and cannot be imported in scripting mode, so it is set explicitly.
Reviewed-by: lagergren, sundar

 #// 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 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 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(), FileVisitOption.FOLLOW_LINKS).
       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]));