1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * - Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * - Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * - Neither the name of Oracle nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 33 // Simple demo of Nashorn Parser API 34 35 var Parser = Java.type("jdk.nashorn.api.tree.Parser"); 36 var SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1"); 37 var IdentifierTree = Java.type("jdk.nashorn.api.tree.IdentifierTree"); 38 39 var parser = Parser.create(); 40 var ast = parser.parse("t", "eval('hello');\n eval(2 + 3)", print); 41 // locate 'eval' calls in the script 42 ast.accept(visitor = new (Java.extend(SimpleTreeVisitor)) { 43 lineMap: null, 44 visitCompilationUnit: function(node, extra) { 45 this.lineMap = node.lineMap; 46 Java.super(visitor).visitCompilationUnit(node, extra); 47 }, 48 49 visitFunctionCall: function(node, extra) { 50 var func = node.functionSelect; 51 if (func instanceof IdentifierTree && func.name == "eval") { 52 var pos = node.startPosition; 53 var line = this.lineMap.getLineNumber(pos); 54 var column = this.lineMap.getColumnNumber(pos); 55 print("eval call found @ " + line + ":" + column); 56 } 57 } 58 }, null);