1 #// Usage: jjs find_nonfinals2.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 finds method 36 // parameters without "final" keyword and prints info on those. 37 38 if (arguments.length == 0) { 39 print("Usage: jjs find_nonfinals2.js -- <directory>"); 40 exit(1); 41 } 42 43 // Java types used 44 var File = Java.type("java.io.File"); 45 var Files = Java.type("java.nio.file.Files"); 46 var FileVisitOption = Java.type("java.nio.file.FileVisitOption"); 47 var StringArray = Java.type("java.lang.String[]"); 48 var ToolProvider = Java.type("javax.tools.ToolProvider"); 49 var Tree = Java.type("com.sun.source.tree.Tree"); 50 var TreeScanner = Java.type("com.sun.source.util.TreeScanner"); 51 var Modifier = Java.type("javax.lang.model.element.Modifier"); 52 53 function checkNonFinalParams(p) { 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 find non-final method params 64 var NonFinalsFinder = Java.extend(TreeScanner); 65 66 function printMethod(method) { 67 print(method.modifiers + " "+ method.returnType + " " + 68 method.name + "(" + method.parameters + ")"); 69 } 70 71 var pkgName, clsName, compUnitName, lineMap; 72 var visitor = new NonFinalsFinder() { 73 visitCompilationUnit: function(compUnit, p) { 74 pkgName = compUnit.packageName; 75 compUnitName = compUnit.sourceFile.name; 76 lineMap = compUnit.lineMap; 77 return Java.super(visitor).visitCompilationUnit(compUnit, p); 78 }, 79 80 visitClass: function(clazz, p) { 81 clsName = clazz.name; 82 return Java.super(visitor).visitClass(clazz, p); 83 }, 84 85 visitMethod: function (method, p) { 86 var params = method.parameters; 87 for each (var p in params) { 88 var modifiers = p.modifiers; 89 if (! modifiers.flags.contains(Modifier.FINAL)) { 90 print(compUnitName); 91 print(pkgName + "." + clsName); 92 printMethod(method); 93 print("->", p, 94 " @ " + lineMap.getLineNumber(p.pos) + ":" + 95 lineMap.getColumnNumber(p.pos)); 96 } 97 } 98 } 99 } 100 101 for each (var cu in task.parse()) { 102 cu.accept(visitor, null); 103 } 104 } 105 106 // for each ".java" file in directory (recursively). 107 function main(dir) { 108 var totalCount = 0; 109 Files.walk(dir.toPath(), FileVisitOption.FOLLOW_LINKS). 110 forEach(function(p) { 111 var name = p.toFile().absolutePath; 112 if (name.endsWith(".java")) { 113 checkNonFinalParams(p); 114 } 115 }); 116 } 117 118 main(new File(arguments[0]));