135 lines
4.6 KiB
JavaScript
135 lines
4.6 KiB
JavaScript
/*
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* Copyright (c) 2015, 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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*
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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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*
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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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*
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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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*
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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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/**
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* Simple Web Console-like support for Nashorn. In addition to
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* Web console object methods, this console add methods of
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* java.io.Console as well. Note:not all web console methods are
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* implemented but useful subset is implemented.
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*
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* See also: https://developer.mozilla.org/en/docs/Web/API/console
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*/
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if (typeof console == 'undefined') {
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(function() {
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var LocalDateTime = Java.type("java.time.LocalDateTime");
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var System = Java.type("java.lang.System");
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var jconsole = System.console();
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// add a new global variable called "console"
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this.console = {
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};
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function addConsoleMethods() {
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// expose methods of java.io.Console as an extension
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var placeholder = "-*-";
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// put a placeholder for each name from java.lang.Object
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var objMethods = Object.bindProperties({}, new java.lang.Object());
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for (var m in objMethods) {
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console[m] = placeholder;
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}
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// bind only the methods of java.io.Console
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// This bind will skip java.lang.Object methods as console
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// has properties of same name.
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Object.bindProperties(console, jconsole);
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// Now, delete java.lang.Object methods
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for (var m in console) {
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if (console[m] == placeholder) {
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delete console[m];
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}
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}
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}
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addConsoleMethods();
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function consoleLog(type, msg) {
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// print type of message, then time.
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jconsole.format("%s [%s] ", type, LocalDateTime.now().toString());
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if (typeof msg == 'string') {
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jconsole.format(msg + "\n", Array.prototype.slice.call(arguments, 2));
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} else {
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// simple space separated values and newline at the end
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var arr = Array.prototype.slice.call(arguments, 1);
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jconsole.format("%s\n", arr.join(" "));
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}
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}
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console.toString = function() "[object Console]";
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// web console functions
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console.assert = function(expr) {
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if (! expr) {
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arguments[0] = "Assertion Failed:";
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consoleLog.apply(console, arguments);
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// now, stack trace at the end
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jconsole.format("%s\n", new Error().stack);
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}
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};
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// dummy clear to avoid error!
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console.clear = function() {};
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var counter = {
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get: function(label) {
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if (! this[label]) {
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return this[label] = 1;
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} else {
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return ++this[label];
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}
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}
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};
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// counter
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console.count = function(label) {
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label = label? String(label) : "<no label>";
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jconsole.format("%s: %d\n",label, counter.get(label).intValue());
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}
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// logging
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console.error = consoleLog.bind(jconsole, "ERROR");
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console.info = consoleLog.bind(jconsole, "INFO");
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console.log = console.info;
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console.debug = console.log;
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console.warn = consoleLog.bind(jconsole, "WARNING");
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// print stack trace
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console.trace = function() {
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jconsole.format("%s\n", new Error().stack);
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};
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})();
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}
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