--- /dev/null 2015-06-08 07:58:07.718555954 +0530 +++ new/samples/autoimports.js 2015-06-08 14:02:47.059049742 +0530 @@ -0,0 +1,151 @@ +# autoimports script requires -scripting mode + +/* + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of Oracle nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * It is tedious to import Java classes used in a script. Sometimes it is easier + * use simple names of java classes and have a script auto import Java classes. + * You can load this script at the start of an interactive jjs session or at the + * start of your script. This script defines a __noSuchProperty__ hook to auto + * import Java classes as needed and when they are referred to for the first time + * in your script. You can also call the "autoimports" function to print script + * statements that you need to use in your script, i.e., have the function generate + * a script to import Java classes used by your script so far. After running your + * script, you can call autoimports to get the exact Java imports you need and replace + * the autoimports load with the generated import statements (to avoid costly init of + * the autoimports script). + */ + +(function() { + var ArrayList = Java.type("java.util.ArrayList"); + var HashMap = Java.type("java.util.HashMap"); + var Files = Java.type("java.nio.file.Files"); + var FileSystems = Java.type("java.nio.file.FileSystems"); + var URI = Java.type("java.net.URI"); + + // initialize a class to package map by iterating all + // classes available in the system by walking through "jrt fs" + var fs = FileSystems.getFileSystem(URI.create("jrt:/")); + var root = fs.getPath('/'); + + var clsToPkg = new HashMap(); + + function addToClsToPkg(c, p) { + if (clsToPkg.containsKey(c)) { + var val = clsToPkg.get(c); + if (val instanceof ArrayList) { + val.add(p); + } else { + var al = new ArrayList(); + al.add(val); + al.add(p); + clsToPkg.put(c, al); + } + } else { + clsToPkg.put(c, p); + } + } + + // handle collision and allow user to choose package + function getPkgOfCls(c) { + var val = clsToPkg.get(c); + if (val instanceof ArrayList) { + var count = 1; + print("Multiple matches for " + c + ", choose package:"); + for each (var v in val) { + print(count + ". " + v); + count++; + } + var choice = parseInt(readLine()); + if (isNaN(choice) || choice < 1 || choice > val.size()) { + print("invalid choice: " + choice); + return undefined; + } + return val.get(choice - 1); + } else { + return val; + } + } + + Files.walk(root).forEach(function(p) { + if (Files.isRegularFile(p)) { + var str = p.toString(); + if (str.endsWith(".class")) { + str = str.substring(1); + var idx = str.indexOf('/'); + if (idx != -1) { + str = str.substring(idx + 1); + if (str.startsWith("java") || + str.startsWith("javax") || + str.startsWith("org")) { + var lastIdx = str.lastIndexOf('/'); + if (lastIdx != -1) { + var pkg = str.substring(0, lastIdx).replaceAll('/', '.'); + var cls = str.substring(lastIdx + 1, str.lastIndexOf(".class")); + addToClsToPkg(cls, pkg); + } + } + } + } + } + }); + + var imports = new ArrayList(); + var global = this; + var oldNoSuchProp = global.__noSuchProperty__; + this.__noSuchProperty__ = function(name) { + 'use strict'; + + if (clsToPkg.containsKey(name)) { + var pkg = getPkgOfCls(name); + if (pkg) { + var clsName = pkg + "." + name; + imports.add("var " + name + " = Java.type('" + clsName + "');"); + return global[name] = Java.type(clsName); + } + } else if (typeof oldNoSuchProp == 'function') { + return oldNoSuchProp.call(this, name); + } + + if (typeof this == 'undefined') { + throw new ReferenceError(name); + } else { + return undefined; + } + } + + this.autoimports = function() { + for each (var im in imports) { + print(im); + } + } +})(); --- /dev/null 2015-06-08 07:58:07.718555954 +0530 +++ new/samples/dateconversion.js 2015-06-08 14:02:47.511051985 +0530 @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of Oracle nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +// Converting between #javascript Date and #java8 LocalDateTime with #nashorn + +// JavaScript Date with current time +var d = new Date(); +print(d); + +// Java 8 java.time classes used +var Instant = java.time.Instant; +var LocalDateTime = java.time.LocalDateTime; +var ZoneId = java.time.ZoneId; + +// Date.prototype.getTime + +// getTime() method returns the numeric value corresponding to the time +// for the specified date according to universal time. The value returned +// by the getTime() method is the number of milliseconds since 1 January 1970 00:00:00 UTC. +// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTime + +// Java Instant.ofEpochMilli to convert time in milliseconds to Instant object +// https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#ofEpochMilli-long- + +var instant = Instant.ofEpochMilli(d.getTime()); + +// Instant to LocalDateTime using LocalDateTime.ofInstant +// https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#ofInstant-java.time.Instant-java.time.ZoneId- + +var ldt = LocalDateTime.ofInstant(instant, ZoneId.systemDefault()); +print(ldt); + +// converting a LocalDateTime to JavaScript Date +// convert LocalDateTime to Instant first +// https://docs.oracle.com/javase/8/docs/api/java/time/LocalDateTime.html#atZone-java.time.ZoneId- + +var instant = ldt.atZone(ZoneId.systemDefault()).toInstant(); + +// instant to to epoch milliseconds +// https://docs.oracle.com/javase/8/docs/api/java/time/Instant.html#toEpochMilli-- +// and then to JavaScript Date from time in milliseconds +// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Date + +var d1 = new Date(instant.toEpochMilli()); +print(d1); --- /dev/null 2015-06-08 07:58:07.718555954 +0530 +++ new/samples/secondssince.js 2015-06-08 14:02:47.799053413 +0530 @@ -0,0 +1,43 @@ +# usage: jjs secondssince.js + +/* + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of Oracle nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +// Number of seconds elapsed since the specified Instance #nashorn #javascript #java +// Input date and time in ISO 8601 format +// Example: 2001-01-01T00:00:00Z for 1 Jan 2001, 0 GMT + +var Instant = java.time.Instant; +var ChronoUnit = java.time.temporal.ChronoUnit; +print("Enter date time:"); +var sec = Instant.parse(readLine()). + until(Instant.now(), ChronoUnit.SECONDS); +print(sec);