parserapi.js revision 1593:8faab9cd4b95 
1/*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/**
25 * Nashorn parser API usage.
26 *
27 * @test
28 * @option -scripting
29 * @run
30 */
31
32function Parser() {
33    // create nashorn parser
34    this._parser = Parser.create();
35}
36
37// Java types used
38Parser.Diagnostic = Java.type("jdk.nashorn.api.tree.Diagnostic");
39Parser.SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1");
40Parser.Tree = Java.type("jdk.nashorn.api.tree.Tree");
41Parser.List = Java.type("java.util.List");
42Parser.Enum = Java.type("java.lang.Enum");
43
44// function to parse the script and return script friendly object
45Parser.prototype.parse = function(name, script, listener) {
46    var tree = this._parser.parse(name, script, listener);
47    tree.accept(new Parser.SimpleTreeVisitor(), null);
48    return this.convert(tree);
49}
50
51Parser.create = function() {
52    return Java.type("jdk.nashorn.api.tree.Parser").create();
53}
54
55// convert Nashorn parser Tree, Diagnostic as a script friendly object
56Parser.prototype.convert = function(tree) {
57    if (!tree || typeof tree != 'object' || tree instanceof java.lang.Long) {
58        return tree;
59    }
60
61    var obj = Object.bindProperties({}, tree);
62    var result = {};
63    for (var i in obj) {
64        var val = obj[i];
65        if (val instanceof Parser.Tree) {
66            result[i] = this.convert(val);
67        } else if (val instanceof Parser.List) {
68            var arr = new Array(val.size());
69            for (var j in val) {
70                arr[j] = this.convert(val[j]);
71            }
72
73            result[i] = arr;
74        } else {
75            switch (typeof val) {
76                case 'number':
77                case 'string':
78                case 'boolean':
79                    result[i] = String(val);
80                    break;
81                default:
82                    if (val instanceof java.lang.Long || val instanceof Parser.Enum) {
83                        result[i] = String(val);
84                    }
85            }
86        }
87    }
88    return result;
89}
90
91function processFiles(subdir) {
92    var File = Java.type("java.io.File");
93    var files = new File(__DIR__ + subdir).listFiles();
94    java.util.Arrays.sort(files);
95    for each (var file in files) {
96        if (file.name.endsWith(".js")) {
97            var script = readFully(file);
98            var parser = new Parser();
99            var tree = parser.parse(subdir + "/" + file.name, script,
100                function(diagnostic) {
101                    print(JSON.stringify(parser.convert(diagnostic), null, 2).replace(/\\r/g, ''));
102                    print(",");
103                });
104
105            if (tree != null) {
106                print(JSON.stringify(tree, null, 2));
107                print(",");
108            }
109        }
110    }
111}
112
113// parse files in parsertests directory
114function main() {
115    print("[");
116
117    processFiles("parsertests");
118    processFiles("parsernegativetests");
119
120    // parse this file first!
121    var script = readFully(__FILE__);
122    var tree = new Parser().parse("parserapi.js", script, null);
123    print(JSON.stringify(tree, null, 2));
124    print("]");
125}
126
127main();
128