Java tutorial
/* Copyright (C) 2005 Jesper Goertz All Rights Reserved, http://hippogrif.dk/sw/prettyxml This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ package dk.hippogrif.prettyxml.app; import java.io.*; import java.net.*; import java.util.*; import java.util.logging.Level; import java.util.logging.Logger; import org.apache.commons.cli.*; import org.apache.commons.io.IOUtils; import dk.hippogrif.prettyxml.*; /** * A command line application for prettyprinting an xml file. * If no options are present the GUI application is invoked. * See {@link dk.hippogrif.prettyxml}. * * @author Jesper Goertz * @see MainJFrame */ public class Main { private static Logger logger = Logger.getLogger("dk.hippogrif.prettyxml.Main"); private static String version; private static Options options; private static List optionList; /** * init options for resetting options between (test) uses, * because commons-cli-1.0 from maven stores state in them * whereas the original 1.0 does not */ static void initOptions() { options = mkOptions(); optionList = sortOptions(options); } private static List sortOptions(Options options) { ArrayList list = new ArrayList(options.getOptions()); Collections.sort(list, new Comparator() { public int compare(Object o1, Object o2) { return ((Option) o1).getOpt().compareTo(((Option) o2).getOpt()); } }); return list; } private static Options mkOptions() { Options options = new Options(); options.addOption("h", false, "help"); options.addOption("v", false, "version"); options.addOption("s", false, "sort attributes on name"); options.addOption("a", false, "indent attributes"); Option option; option = new Option("n", true, "no of spaces to indent, default 2"); option.setArgName("no"); options.addOption(option); option = new Option("p", true, "property file holding output format and options"); option.setArgName("file"); options.addOption(option); option = new Option("t", true, "an xslt pipeline of one or more stylesheets separated by ;"); option.setArgName("files"); options.addOption(option); option = new Option("i", true, "input file"); option.setArgName("file"); options.addOption(option); option = new Option("u", true, "input URL"); option.setArgName("url"); options.addOption(option); option = new Option("o", true, "output file"); option.setArgName("file"); options.addOption(option); return options; } private static void help(PrintStream ps) { ps.println("prettyxml prettyprints an xml file"); ps.println(""); usage(ps); ps.println(""); ps.println("the property file may hold the following properties:"); ps.println(" encoding = string, e.g., UTF-8 (default), ISO-8859-1"); ps.println(" expandEmptyElements = TRUE | FALSE (default)"); ps.println(" indent = no of spaces to indent (min 1, max 99)"); ps.println(" lineSeparator = string, i.e., \\r, \\n or \\r\\n (default)"); ps.println(" omitDeclaration = TRUE | FALSE (default)"); ps.println(" omitEncoding = TRUE | FALSE (default)"); ps.println(" textMode = NORMALIZE | TRIM | TRIM_FULL_WHITE | PRESERVE (default)"); ps.println(" indentAttributes = TRUE | FALSE (default)"); ps.println(" sortAttributes = TRUE | FALSE (default)"); ps.println(" transform = an xslt pipeline of one or more stylesheets separated by ;"); ps.println(" input = input file"); ps.println(" url = input url"); ps.println(" output = output file"); ps.println(""); ps.println("use the xslt pipeline to sort elements or filter nodes"); ps.println("standard input is used if no file or url is specified"); ps.println("standard output is used if no file is specified"); ps.println("property file and transformation stylesheets are located in this order:"); ps.println(" built-in, file, classpath resource"); ps.print("built-in property files:"); String[] sa = PrettyPrint.getSettings(); for (int i = 0; i < sa.length; i++) { ps.print(" " + sa[i]); } ps.println(""); ps.print("built-in transformation stylesheets:"); sa = PrettyPrint.getTransformations(); for (int i = 0; i < sa.length; i++) { ps.print(" " + sa[i]); } ps.println(""); } private static void version(PrintStream ps) { ps.println("prettyxml version " + version); ps.println("Copyright (C) 2005 Jesper Goertz"); ps.println("All Rights Reserved, http://hippogrif.dk/sw/prettyxml"); ps.println("prettyxml comes with ABSOLUTELY NO WARRANTY"); ps.println("this is free software under GNU GENERAL PUBLIC LICENSE Version 2"); } private static void usage(PrintStream ps) { ps.println("usage: prettyxml option+"); optionUsage(ps); } private static void optionUsage(PrintStream ps) { for (Iterator iter = optionList.iterator(); iter.hasNext();) { Option option = (Option) iter.next(); ps.print(" -" + option.getOpt()); String spaces = " "; int i = 0; if (option.hasArg()) { ps.print(" " + option.getArgName()); i = option.getArgName().length() + 1; } ps.print(spaces.substring(i)); ps.println(option.getDescription()); } } static CommandLine parse(String[] args) { CommandLineParser parser = new BasicParser(); CommandLine cmd = null; try { cmd = parser.parse(options, args); } catch (ParseException pe) { logger.log(Level.FINE, "parse", pe); } return cmd; } static CommandLine getCmdLine(String[] args) { initOptions(); CommandLine cmd = parse(args); if (args.length == 0 || cmd == null || cmd.getArgs().length > 0) { usage(System.out); cmd = null; } else if (cmd.hasOption("h")) { help(System.out); cmd = null; } else if (cmd.hasOption("v")) { version(System.out); cmd = null; } return cmd; } static Properties getProperties(CommandLine cmd) throws Exception { Properties prop = new Properties(); if (cmd.hasOption("p")) { String pname = cmd.getOptionValue("p"); prop = PrettyPrint.getSetting(pname); if (prop == null) { prop = PrettyPrint.loadProperties(new File(pname)); } } else { // default Pretty format prop.put(PrettyPrint.INDENT, "2"); prop.put(PrettyPrint.TEXT_MODE, "TRIM"); } if (cmd.hasOption("n")) { prop.put(PrettyPrint.INDENT, cmd.getOptionValue("n")); } if (cmd.hasOption("a")) { prop.put(PrettyPrint.INDENT_ATTRIBUTES, "TRUE"); } if (cmd.hasOption("s")) { prop.put(PrettyPrint.SORT_ATTRIBUTES, "TRUE"); } if (cmd.hasOption("t")) { prop.put(PrettyPrint.TRANSFORM, cmd.getOptionValue("t")); } if (cmd.hasOption("i")) { prop.put(PrettyPrint.INPUT, cmd.getOptionValue("i")); } if (cmd.hasOption("o")) { prop.put(PrettyPrint.OUTPUT, cmd.getOptionValue("o")); } if (cmd.hasOption("u")) { prop.put(PrettyPrint.URL, cmd.getOptionValue("u")); } PrettyPrint.checkProperties(prop, true); return prop; } /** * Application using commandline options or running GUI if no options. */ public static void main(String[] args) { try { PrettyPrint prettyPrint = new PrettyPrint(); version = prettyPrint.getVersion(); if (args.length == 0) { MainJFrame.run(version); } else { go(args); } } catch (Exception e) { logger.log(Level.FINE, "main", e); System.err.println(e.getMessage()); } } static void go(String[] args) throws Exception { CommandLine cmd = getCmdLine(args); if (cmd == null) { return; } Properties prop = getProperties(cmd); PrettyPrint.execute(prop); } }