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);