1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/samples/console.js Thu May 21 18:44:51 2015 +0530
1.3 @@ -0,0 +1,134 @@
1.4 +/*
1.5 + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
1.6 + *
1.7 + * Redistribution and use in source and binary forms, with or without
1.8 + * modification, are permitted provided that the following conditions
1.9 + * are met:
1.10 + *
1.11 + * - Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + *
1.14 + * - Redistributions in binary form must reproduce the above copyright
1.15 + * notice, this list of conditions and the following disclaimer in the
1.16 + * documentation and/or other materials provided with the distribution.
1.17 + *
1.18 + * - Neither the name of Oracle nor the names of its
1.19 + * contributors may be used to endorse or promote products derived
1.20 + * from this software without specific prior written permission.
1.21 + *
1.22 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.23 + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.24 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.25 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.26 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.27 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.28 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.29 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.30 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.31 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.32 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.33 + */
1.34 +
1.35 +/**
1.36 + * Simple Web Console-like support for Nashorn. In addition to
1.37 + * Web console object methods, this console add methods of
1.38 + * java.io.Console as well. Note:not all web console methods are
1.39 + * implemented but useful subset is implemented.
1.40 + *
1.41 + * See also: https://developer.mozilla.org/en/docs/Web/API/console
1.42 + */
1.43 +
1.44 +
1.45 +if (typeof console == 'undefined') {
1.46 +
1.47 +(function() {
1.48 + var LocalDateTime = Java.type("java.time.LocalDateTime");
1.49 + var System = Java.type("java.lang.System");
1.50 + var jconsole = System.console();
1.51 +
1.52 + // add a new global variable called "console"
1.53 + this.console = {
1.54 + };
1.55 +
1.56 + function addConsoleMethods() {
1.57 + // expose methods of java.io.Console as an extension
1.58 + var placeholder = "-*-";
1.59 + // put a placeholder for each name from java.lang.Object
1.60 + var objMethods = Object.bindProperties({}, new java.lang.Object());
1.61 + for (var m in objMethods) {
1.62 + console[m] = placeholder;
1.63 + }
1.64 +
1.65 + // bind only the methods of java.io.Console
1.66 + // This bind will skip java.lang.Object methods as console
1.67 + // has properties of same name.
1.68 + Object.bindProperties(console, jconsole);
1.69 +
1.70 + // Now, delete java.lang.Object methods
1.71 + for (var m in console) {
1.72 + if (console[m] == placeholder) {
1.73 + delete console[m];
1.74 + }
1.75 + }
1.76 + }
1.77 +
1.78 + addConsoleMethods();
1.79 +
1.80 + function consoleLog(type, msg) {
1.81 + // print type of message, then time.
1.82 + jconsole.format("%s [%s] ", type, LocalDateTime.now().toString());
1.83 + if (typeof msg == 'string') {
1.84 + jconsole.format(msg + "\n", Array.prototype.slice.call(arguments, 2));
1.85 + } else {
1.86 + // simple space separated values and newline at the end
1.87 + var arr = Array.prototype.slice.call(arguments, 1);
1.88 + jconsole.format("%s\n", arr.join(" "));
1.89 + }
1.90 + }
1.91 +
1.92 + console.toString = function() "[object Console]";
1.93 +
1.94 + // web console functions
1.95 +
1.96 + console.assert = function(expr) {
1.97 + if (! expr) {
1.98 + arguments[0] = "Assertion Failed:";
1.99 + consoleLog.apply(console, arguments);
1.100 + // now, stack trace at the end
1.101 + jconsole.format("%s\n", new Error().stack);
1.102 + }
1.103 + };
1.104 +
1.105 + // dummy clear to avoid error!
1.106 + console.clear = function() {};
1.107 +
1.108 + var counter = {
1.109 + get: function(label) {
1.110 + if (! this[label]) {
1.111 + return this[label] = 1;
1.112 + } else {
1.113 + return ++this[label];
1.114 + }
1.115 + }
1.116 + };
1.117 +
1.118 + // counter
1.119 + console.count = function(label) {
1.120 + label = label? String(label) : "<no label>";
1.121 + jconsole.format("%s: %d\n",label, counter.get(label).intValue());
1.122 + }
1.123 +
1.124 + // logging
1.125 + console.error = consoleLog.bind(jconsole, "ERROR");
1.126 + console.info = consoleLog.bind(jconsole, "INFO");
1.127 + console.log = console.info;
1.128 + console.debug = console.log;
1.129 + console.warn = consoleLog.bind(jconsole, "WARNING");
1.130 +
1.131 + // print stack trace
1.132 + console.trace = function() {
1.133 + jconsole.format("%s\n", new Error().stack);
1.134 + };
1.135 +})();
1.136 +
1.137 +}
