Mercurial > jdk8-mips64-public > nashorn / file comparison
comparison: samples/javafoovars.js
samples/javafoovars.js
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| 1 #// Usage: jjs javafoovars.js -- <directory> | |
| 2 | |
| 3 /* | |
| 4 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions | |
| 8 * are met: | |
| 9 * | |
| 10 * - Redistributions of source code must retain the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer. | |
| 12 * | |
| 13 * - Redistributions in binary form must reproduce the above copyright | |
| 14 * notice, this list of conditions and the following disclaimer in the | |
| 15 * documentation and/or other materials provided with the distribution. | |
| 16 * | |
| 17 * - Neither the name of Oracle nor the names of its | |
| 18 * contributors may be used to endorse or promote products derived | |
| 19 * from this software without specific prior written permission. | |
| 20 * | |
| 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
| 22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
| 25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 32 */ | |
| 33 | |
| 34 // This example demonstrates Java subclassing by Java.extend | |
| 35 // and javac Compiler and Tree API. This example counts number | |
| 36 // of variables called "foo" in the given java source files! | |
| 37 if (arguments.length == 0) { | |
| 38 print("Usage: jjs javafoovars.js -- <directory>"); | |
| 39 exit(1); | |
| 40 } | |
| 41 | |
| 42 // Java types used | |
| 43 var File = Java.type("java.io.File"); | |
| 44 var Files = Java.type("java.nio.file.Files"); | |
| 45 var FileVisitOption = Java.type("java.nio.file.FileVisitOption"); | |
| 46 var StringArray = Java.type("java.lang.String[]"); | |
| 47 var ToolProvider = Java.type("javax.tools.ToolProvider"); | |
| 48 var Tree = Java.type("com.sun.source.tree.Tree"); | |
| 49 var TreeScanner = Java.type("com.sun.source.util.TreeScanner"); | |
| 50 var VariableTree = Java.type("com.sun.source.tree.VariableTree"); | |
| 51 | |
| 52 // count "foo"-s in the given .java files | |
| 53 function countFoo() { | |
| 54 // get the system compiler tool | |
| 55 var compiler = ToolProvider.systemJavaCompiler; | |
| 56 // get standard file manager | |
| 57 var fileMgr = compiler.getStandardFileManager(null, null, null); | |
| 58 // Using Java.to convert script array (arguments) to a Java String[] | |
| 59 var compUnits = fileMgr.getJavaFileObjects( | |
| 60 Java.to(arguments, StringArray)); | |
| 61 // create a new compilation task | |
| 62 var task = compiler.getTask(null, fileMgr, null, null, null, compUnits); | |
| 63 // subclass SimpleTreeVisitor - to count variables called "foo" | |
| 64 var FooCounterVisitor = Java.extend(TreeScanner); | |
| 65 var fooCount = 0; | |
| 66 | |
| 67 var visitor = new FooCounterVisitor() { | |
| 68 visitVariable: function (node, p) { | |
| 69 if (node.name.toString() == "foo") { | |
| 70 fooCount++; | |
| 71 } | |
| 72 } | |
| 73 } | |
| 74 | |
| 75 for each (var cu in task.parse()) { | |
| 76 cu.accept(visitor, null); | |
| 77 } | |
| 78 return fooCount; | |
| 79 } | |
| 80 | |
| 81 // for each ".java" file in directory (recursively) count "foo". | |
| 82 function main(dir) { | |
| 83 var totalCount = 0; | |
| 84 Files.walk(dir.toPath(), FileVisitOption.FOLLOW_LINKS). | |
| 85 forEach(function(p) { | |
| 86 var name = p.toFile().absolutePath; | |
| 87 if (name.endsWith(".java")) { | |
| 88 var count = 0; | |
| 89 try { | |
| 90 count = countFoo(p.toFile().getAbsolutePath()); | |
| 91 } catch (e) { | |
| 92 print(e); | |
| 93 } | |
| 94 if (count != 0) { | |
| 95 print(name + ": " + count); | |
| 96 } | |
| 97 totalCount += count; | |
| 98 } | |
| 99 }); | |
| 100 print("Total foo count: " + totalCount); | |
| 101 } | |
| 102 | |
| 103 main(new File(arguments[0])); |
