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Diffstat (limited to 'samples/javacastcounter.js')
-rw-r--r-- | samples/javacastcounter.js | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/samples/javacastcounter.js b/samples/javacastcounter.js deleted file mode 100644 index 6d569a10..00000000 --- a/samples/javacastcounter.js +++ /dev/null @@ -1,107 +0,0 @@ -/* - * 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. - */ - -// Usage: jjs javacastcounter.js -- <.java files> - -// This example demonstrates Nashorn Java.extend API -// to subclass a Java class from script. - -// This example uses Javac Compiler and Tree API -// to list type casts used in java source files. - -if (arguments.length == 0) { - print("Usage: jjs javacastcounter.js -- <.java files>"); - exit(1); -} - -// Java types used -var ToolProvider = Java.type("javax.tools.ToolProvider"); -var TreeScanner = Java.type("com.sun.source.util.TreeScanner"); -var Trees = Java.type("com.sun.source.util.Trees"); -var StringArray = Java.type("java.lang.String[]"); - -// get the system compiler tool -var compiler = ToolProvider.systemJavaCompiler; - -// get standard file manager -var fileMgr = compiler.getStandardFileManager(null, null, null); - -// make a list of compilation unit from command line argument file names -// 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); - -// SourcePositions object to get positions of AST nodes -var sourcePositions = Trees.instance(task).sourcePositions; - -// Subclass TreeScanner class -var CastCounter = Java.extend(TreeScanner); - -var counter = new CastCounter() { - // current CompilationUnitTree - compUnit: null, - // current LineMap (pos -> line, column) - lineMap: null, - // current compilation unit's file name - fileName: null, - - // overrides of TreeScanner methods - - visitCompilationUnit: function(node, p) { - // capture info about current Compilation unit - this.compUnit = node; - this.lineMap = node.lineMap; - this.fileName = node.sourceFile.name; - - // Using Java.super API to call super class method here - return Java.super(counter).visitCompilationUnit(node, p); - }, - - visitTypeCast: function(node, p) { - // print information on this type cast node - var pos = sourcePositions.getStartPosition(this.compUnit, node); - var line = this.lineMap.getLineNumber(pos); - var col = this.lineMap.getColumnNumber(pos); - print(node + " @ " + this.fileName + ":" + line + ":" + col); - - // count one more type cast - return 1; - }, - - reduce: function(r1, r2) { - return (r1 == null ? 0 : r1) + (r2 == null ? 0 : r2); - } -}; - -// print total number of type cast nodes seen -print("Total casts:", counter.scan(task.parse(), null)); |