sundar@1373: /*
sundar@1373:  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
sundar@1373:  *
sundar@1373:  * Redistribution and use in source and binary forms, with or without
sundar@1373:  * modification, are permitted provided that the following conditions
sundar@1373:  * are met:
sundar@1373:  *
sundar@1373:  *   - Redistributions of source code must retain the above copyright
sundar@1373:  *     notice, this list of conditions and the following disclaimer.
sundar@1373:  *
sundar@1373:  *   - Redistributions in binary form must reproduce the above copyright
sundar@1373:  *     notice, this list of conditions and the following disclaimer in the
sundar@1373:  *     documentation and/or other materials provided with the distribution.
sundar@1373:  *
sundar@1373:  *   - Neither the name of Oracle nor the names of its
sundar@1373:  *     contributors may be used to endorse or promote products derived
sundar@1373:  *     from this software without specific prior written permission.
sundar@1373:  *
sundar@1373:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
sundar@1373:  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
sundar@1373:  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sundar@1373:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
sundar@1373:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
sundar@1373:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
sundar@1373:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
sundar@1373:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
sundar@1373:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
sundar@1373:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
sundar@1373:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sundar@1373:  */
sundar@1373: 
sundar@1373: /**
sundar@1373:  * Simple Web Console-like support for Nashorn. In addition to
sundar@1373:  * Web console object methods, this console add methods of
sundar@1373:  * java.io.Console as well. Note:not all web console methods are 
sundar@1373:  * implemented but useful subset is implemented.
sundar@1373:  *
sundar@1373:  * See also: https://developer.mozilla.org/en/docs/Web/API/console
sundar@1373:  */
sundar@1373: 
sundar@1373: 
sundar@1373: if (typeof console == 'undefined') {
sundar@1373: 
sundar@1373: (function() {
sundar@1373:     var LocalDateTime = Java.type("java.time.LocalDateTime");
sundar@1373:     var System = Java.type("java.lang.System");
sundar@1373:     var jconsole = System.console();
sundar@1373: 
sundar@1373:     // add a new global variable called "console"
sundar@1373:     this.console = {
sundar@1373:     };
sundar@1373: 
sundar@1373:     function addConsoleMethods() {
sundar@1373:         // expose methods of java.io.Console as an extension
sundar@1373:         var placeholder = "-*-";
sundar@1373:         // put a placeholder for each name from java.lang.Object
sundar@1373:         var objMethods = Object.bindProperties({}, new java.lang.Object());
sundar@1373:         for (var m in objMethods) {
sundar@1373:             console[m] = placeholder;
sundar@1373:         }
sundar@1373: 
sundar@1373:         // bind only the methods of java.io.Console
sundar@1373:         // This bind will skip java.lang.Object methods as console
sundar@1373:         // has properties of same name.
sundar@1373:         Object.bindProperties(console, jconsole);
sundar@1373: 
sundar@1373:         // Now, delete java.lang.Object methods
sundar@1373:         for (var m in console) {
sundar@1373:             if (console[m] == placeholder) {
sundar@1373:                 delete console[m];
sundar@1373:             }
sundar@1373:         }
sundar@1373:     }
sundar@1373: 
sundar@1373:     addConsoleMethods();
sundar@1373: 
sundar@1373:     function consoleLog(type, msg) {
sundar@1373:         // print type of message, then time.
sundar@1373:         jconsole.format("%s [%s] ", type, LocalDateTime.now().toString());
sundar@1373:         if (typeof msg == 'string') {
sundar@1373:             jconsole.format(msg + "\n", Array.prototype.slice.call(arguments, 2));
sundar@1373:         } else {
sundar@1373:             // simple space separated values and newline at the end
sundar@1373:             var arr = Array.prototype.slice.call(arguments, 1);
sundar@1373:             jconsole.format("%s\n", arr.join(" "));
sundar@1373:         }
sundar@1373:     }
sundar@1373: 
sundar@1373:     console.toString = function() "[object Console]";
sundar@1373: 
sundar@1373:     // web console functions
sundar@1373: 
sundar@1373:     console.assert = function(expr) {
sundar@1373:         if (! expr) {
sundar@1373:             arguments[0] = "Assertion Failed:"; 
sundar@1373:             consoleLog.apply(console, arguments);
sundar@1373:             // now, stack trace at the end
sundar@1373:             jconsole.format("%s\n", new Error().stack);
sundar@1373:         }
sundar@1373:     };
sundar@1373: 
sundar@1373:     // dummy clear to avoid error!
sundar@1373:     console.clear = function() {};
sundar@1373: 
sundar@1373:     var counter = {
sundar@1373:         get: function(label) {
sundar@1373:             if (! this[label]) {
sundar@1373:                 return this[label] = 1;
sundar@1373:             } else {
sundar@1373:                 return ++this[label];
sundar@1373:             }
sundar@1373:         }
sundar@1373:     };
sundar@1373:    
sundar@1373:     // counter 
sundar@1373:     console.count = function(label) {
sundar@1373:         label = label? String(label) : "<no label>";
sundar@1373:         jconsole.format("%s: %d\n",label, counter.get(label).intValue());
sundar@1373:     }
sundar@1373: 
sundar@1373:     // logging
sundar@1373:     console.error = consoleLog.bind(jconsole, "ERROR");
sundar@1373:     console.info = consoleLog.bind(jconsole, "INFO");
sundar@1373:     console.log = console.info;
sundar@1373:     console.debug = console.log;
sundar@1373:     console.warn = consoleLog.bind(jconsole, "WARNING");
sundar@1373: 
sundar@1373:     // print stack trace
sundar@1373:     console.trace = function() {
sundar@1373:         jconsole.format("%s\n", new Error().stack);
sundar@1373:     };
sundar@1373: })();
sundar@1373: 
sundar@1373: }