author | tschatzl |
Mon, 22 Dec 2014 16:49:24 +0100 | |
changeset 28215 | 4920c0fcdb07 |
parent 26067 | b32ccc3a76c9 |
child 32692 | 8f60bd284bf4 |
permissions | -rw-r--r-- |
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#// Usage: jjs javafoovars.js -- <directory> |
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/* |
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* - Neither the name of Oracle nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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// This example demonstrates Java subclassing by Java.extend |
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// and javac Compiler and Tree API. This example counts number |
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// of variables called "foo" in the given java source files! |
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if (arguments.length == 0) { |
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print("Usage: jjs javafoovars.js -- <directory>"); |
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exit(1); |
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} |
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// Java types used |
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var File = Java.type("java.io.File"); |
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var Files = Java.type("java.nio.file.Files"); |
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var FileVisitOption = Java.type("java.nio.file.FileVisitOption"); |
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var StringArray = Java.type("java.lang.String[]"); |
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var ToolProvider = Java.type("javax.tools.ToolProvider"); |
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var Tree = Java.type("com.sun.source.tree.Tree"); |
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var TreeScanner = Java.type("com.sun.source.util.TreeScanner"); |
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var VariableTree = Java.type("com.sun.source.tree.VariableTree"); |
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// count "foo"-s in the given .java files |
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function countFoo() { |
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// get the system compiler tool |
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var compiler = ToolProvider.systemJavaCompiler; |
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// get standard file manager |
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var fileMgr = compiler.getStandardFileManager(null, null, null); |
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// Using Java.to convert script array (arguments) to a Java String[] |
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var compUnits = fileMgr.getJavaFileObjects( |
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Java.to(arguments, StringArray)); |
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// create a new compilation task |
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var task = compiler.getTask(null, fileMgr, null, null, null, compUnits); |
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// subclass SimpleTreeVisitor - to count variables called "foo" |
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var FooCounterVisitor = Java.extend(TreeScanner); |
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var fooCount = 0; |
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var visitor = new FooCounterVisitor() { |
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visitVariable: function (node, p) { |
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if (node.name.toString() == "foo") { |
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fooCount++; |
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} |
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} |
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} |
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for each (var cu in task.parse()) { |
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cu.accept(visitor, null); |
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} |
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return fooCount; |
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} |
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// for each ".java" file in directory (recursively) count "foo". |
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function main(dir) { |
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var totalCount = 0; |
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Files.walk(dir.toPath(), FileVisitOption.FOLLOW_LINKS). |
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forEach(function(p) { |
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var name = p.toFile().absolutePath; |
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if (name.endsWith(".java")) { |
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var count = 0; |
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try { |
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count = countFoo(p.toFile().getAbsolutePath()); |
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} catch (e) { |
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print(e); |
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} |
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if (count != 0) { |
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print(name + ": " + count); |
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} |
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totalCount += count; |
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} |
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}); |
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print("Total foo count: " + totalCount); |
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} |
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main(new File(arguments[0])); |