sundar@965: #// Usage: jjs find_nonfinals2.js -- <directory>
sundar@965: 
sundar@965: /*
sundar@965:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
sundar@965:  *
sundar@965:  * Redistribution and use in source and binary forms, with or without
sundar@965:  * modification, are permitted provided that the following conditions
sundar@965:  * are met:
sundar@965:  *
sundar@965:  *   - Redistributions of source code must retain the above copyright
sundar@965:  *     notice, this list of conditions and the following disclaimer.
sundar@965:  *
sundar@965:  *   - Redistributions in binary form must reproduce the above copyright
sundar@965:  *     notice, this list of conditions and the following disclaimer in the
sundar@965:  *     documentation and/or other materials provided with the distribution.
sundar@965:  *
sundar@965:  *   - Neither the name of Oracle nor the names of its
sundar@965:  *     contributors may be used to endorse or promote products derived
sundar@965:  *     from this software without specific prior written permission.
sundar@965:  *
sundar@965:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
sundar@965:  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
sundar@965:  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sundar@965:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
sundar@965:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
sundar@965:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
sundar@965:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
sundar@965:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
sundar@965:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
sundar@965:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
sundar@965:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sundar@965:  */
sundar@965: 
sundar@965: // This example demonstrates Java subclassing by Java.extend
sundar@965: // and javac Compiler and Tree API. This example finds method
sundar@965: // parameters without "final" keyword and prints info on those.
sundar@965: 
sundar@965: if (arguments.length == 0) {
sundar@965:     print("Usage: jjs find_nonfinals2.js -- <directory>");
sundar@965:     exit(1);
sundar@965: }
sundar@965: 
sundar@965: // Java types used
sundar@965: var File = Java.type("java.io.File");
sundar@965: var Files = Java.type("java.nio.file.Files");
sundar@965: var FileVisitOption = Java.type("java.nio.file.FileVisitOption");
sundar@965: var StringArray = Java.type("java.lang.String[]");
sundar@965: var ToolProvider = Java.type("javax.tools.ToolProvider");
sundar@965: var Tree = Java.type("com.sun.source.tree.Tree");
sundar@965: var TreeScanner = Java.type("com.sun.source.util.TreeScanner");
sundar@965: var Modifier = Java.type("javax.lang.model.element.Modifier");
sundar@965: 
sundar@965: function checkNonFinalParams(p) {
sundar@965:     // get the system compiler tool
sundar@965:     var compiler = ToolProvider.systemJavaCompiler;
sundar@965:     // get standard file manager
sundar@965:     var fileMgr = compiler.getStandardFileManager(null, null, null);
sundar@965:     // Using Java.to convert script array (arguments) to a Java String[]
sundar@965:     var compUnits = fileMgr.getJavaFileObjects(
sundar@965:         Java.to(arguments, StringArray));
sundar@965:     // create a new compilation task
sundar@965:     var task = compiler.getTask(null, fileMgr, null, null, null, compUnits);
sundar@965:     // subclass SimpleTreeVisitor - to find non-final method params
sundar@965:     var NonFinalsFinder = Java.extend(TreeScanner);
sundar@965: 
sundar@965:     function printMethod(method) {
sundar@965:         print(method.modifiers + " "+ method.returnType + " " +
sundar@965:             method.name + "(" + method.parameters + ")");
sundar@965:     }
sundar@965: 
sundar@965:     var pkgName, clsName, compUnitName, lineMap;
sundar@965:     var visitor = new NonFinalsFinder() {
sundar@965:         visitCompilationUnit: function(compUnit, p) {
sundar@965:             pkgName = compUnit.packageName;
sundar@965:             compUnitName = compUnit.sourceFile.name;
sundar@965:             lineMap = compUnit.lineMap;
sundar@965:             return Java.super(visitor).visitCompilationUnit(compUnit, p);
sundar@965:         },
sundar@965: 
sundar@965:         visitClass: function(clazz, p) {
sundar@965:             clsName = clazz.name;
sundar@965:             return Java.super(visitor).visitClass(clazz, p);
sundar@965:         },
sundar@965: 
sundar@965:         visitMethod: function (method, p) {
sundar@965:             var params = method.parameters;
sundar@965:             for each (var p in params) {
sundar@965:                 var modifiers = p.modifiers;
sundar@965:                 if (! modifiers.flags.contains(Modifier.FINAL)) {
sundar@965:                     print(compUnitName);
sundar@965:                     print(pkgName + "." + clsName);
sundar@965:                     printMethod(method);
sundar@965:                     print("->", p,
sundar@965:                      " @ " + lineMap.getLineNumber(p.pos) + ":" +
sundar@965:                            lineMap.getColumnNumber(p.pos));
sundar@965:                 }
sundar@965:             }
sundar@965:         }
sundar@965:     }
sundar@965: 
sundar@965:     for each (var cu in task.parse()) {
sundar@965:         cu.accept(visitor, null);
sundar@965:     }
sundar@965: }
sundar@965: 
sundar@965: // for each ".java" file in directory (recursively).
sundar@965: function main(dir) {
sundar@965:     var totalCount = 0;
sundar@965:     Files.walk(dir.toPath(), FileVisitOption.FOLLOW_LINKS).
sundar@965:       forEach(function(p) {
sundar@965:         var name = p.toFile().absolutePath;
sundar@965:         if (name.endsWith(".java")) {
sundar@965:             checkNonFinalParams(p);
sundar@965:         }
sundar@965:       });
sundar@965: }
sundar@965: 
sundar@965: main(new File(arguments[0]));