author | lana |
Thu, 29 Jan 2015 15:36:59 -0800 | |
changeset 28654 | 6a22230c068f |
parent 26067 | b32ccc3a76c9 |
permissions | -rw-r--r-- |
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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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8055199: Tidy up Nashorn codebase for code standards (August 2014)
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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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8055199: Tidy up Nashorn codebase for code standards (August 2014)
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parents:
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changeset
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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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26067
b32ccc3a76c9
8055199: Tidy up Nashorn codebase for code standards (August 2014)
attila
parents:
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changeset
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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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26067
b32ccc3a76c9
8055199: Tidy up Nashorn codebase for code standards (August 2014)
attila
parents:
24283
diff
changeset
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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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// Usage: jjs javacastcounter.js -- <.java files> |
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// This example demonstrates Nashorn Java.extend API |
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// to subclass a Java class from script. |
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// This example uses Javac Compiler and Tree API |
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// to list type casts used in java source files. |
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if (arguments.length == 0) { |
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print("Usage: jjs javacastcounter.js -- <.java files>"); |
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exit(1); |
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} |
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// Java types used |
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var ToolProvider = Java.type("javax.tools.ToolProvider"); |
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var TreeScanner = Java.type("com.sun.source.util.TreeScanner"); |
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var Trees = Java.type("com.sun.source.util.Trees"); |
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var StringArray = Java.type("java.lang.String[]"); |
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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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// make a list of compilation unit from command line argument file names |
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// Using Java.to convert script array (arguments) to a Java String[] |
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var compUnits = fileMgr.getJavaFileObjects(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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// SourcePositions object to get positions of AST nodes |
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var sourcePositions = Trees.instance(task).sourcePositions; |
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// Subclass TreeScanner class |
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var CastCounter = Java.extend(TreeScanner); |
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var counter = new CastCounter() { |
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// current CompilationUnitTree |
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compUnit: null, |
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// current LineMap (pos -> line, column) |
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lineMap: null, |
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// current compilation unit's file name |
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fileName: null, |
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// overrides of TreeScanner methods |
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visitCompilationUnit: function(node, p) { |
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// capture info about current Compilation unit |
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this.compUnit = node; |
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this.lineMap = node.lineMap; |
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this.fileName = node.sourceFile.name; |
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26067
b32ccc3a76c9
8055199: Tidy up Nashorn codebase for code standards (August 2014)
attila
parents:
24283
diff
changeset
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// Using Java.super API to call super class method here |
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return Java.super(counter).visitCompilationUnit(node, p); |
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}, |
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visitTypeCast: function(node, p) { |
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// print information on this type cast node |
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var pos = sourcePositions.getStartPosition(this.compUnit, node); |
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var line = this.lineMap.getLineNumber(pos); |
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var col = this.lineMap.getColumnNumber(pos); |
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print(node + " @ " + this.fileName + ":" + line + ":" + col); |
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// count one more type cast |
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return 1; |
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}, |
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reduce: function(r1, r2) { |
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return (r1 == null ? 0 : r1) + (r2 == null ? 0 : r2); |
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} |
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}; |
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// print total number of type cast nodes seen |
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print("Total casts:", counter.scan(task.parse(), null)); |