148 lines
4.6 KiB
JavaScript
148 lines
4.6 KiB
JavaScript
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* Nashorn parser API usage.
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*
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* @test
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* @option -scripting
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* @run
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*/
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function Parser() {
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// create nashorn parser
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this._parser = Parser.create();
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}
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// Java types used
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Parser.Diagnostic = Java.type("jdk.nashorn.api.tree.Diagnostic");
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Parser.SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1");
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Parser.Tree = Java.type("jdk.nashorn.api.tree.Tree");
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Parser.List = Java.type("java.util.List");
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Parser.Enum = Java.type("java.lang.Enum");
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// function to parse the script and return script friendly object
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Parser.prototype.parse = function(name, script, listener) {
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var tree = this._parser.parse(name, script, listener);
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tree.accept(new Parser.SimpleTreeVisitor(), null);
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return this.convert(tree);
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}
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Parser.create = function() {
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return Java.type("jdk.nashorn.api.tree.Parser").create();
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}
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// convert Nashorn parser Tree, Diagnostic as a script friendly object
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Parser.prototype.convert = function(tree) {
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if (!tree || typeof tree != 'object' || tree instanceof java.lang.Long) {
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return tree;
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}
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var obj = Object.bindProperties({}, tree);
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var result = {};
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for (var i in obj) {
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var val = obj[i];
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// skip these ES6 specific properties to reduce noise
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// in the output - unless there were set to true
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if (typeof(val) == 'boolean' && val == false) {
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switch (i) {
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case "computed":
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case "static":
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case "restParameter":
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case "this":
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case "super":
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case "star":
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case "default":
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case "starDefaultStar":
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case "arrow":
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case "generator":
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case "let":
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case "const":
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continue;
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}
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}
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if (val instanceof Parser.Tree) {
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result[i] = this.convert(val);
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} else if (val instanceof Parser.List) {
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var arr = new Array(val.size());
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for (var j in val) {
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arr[j] = this.convert(val[j]);
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}
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result[i] = arr;
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} else {
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switch (typeof val) {
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case 'number':
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case 'string':
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case 'boolean':
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result[i] = String(val);
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break;
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default:
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if (val instanceof java.lang.Long || val instanceof Parser.Enum) {
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result[i] = String(val);
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}
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}
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}
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}
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return result;
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}
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function processFiles(subdir) {
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var File = Java.type("java.io.File");
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var files = new File(__DIR__ + subdir).listFiles();
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java.util.Arrays.sort(files);
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for each (var file in files) {
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if (file.name.endsWith(".js")) {
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var script = readFully(file);
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var parser = new Parser();
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var tree = parser.parse(subdir + "/" + file.name, script,
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function(diagnostic) {
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print(JSON.stringify(parser.convert(diagnostic), null, 2).replace(/\\r/g, ''));
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print(",");
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});
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if (tree != null) {
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print(JSON.stringify(tree, null, 2));
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print(",");
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}
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}
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}
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}
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// parse files in parsertests directory
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function main() {
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print("[");
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processFiles("parsertests");
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processFiles("parsernegativetests");
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// parse this file first!
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var script = readFully(__FILE__);
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var tree = new Parser().parse("parserapi.js", script, null);
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print(JSON.stringify(tree, null, 2));
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print("]");
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}
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main();
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