Java tutorial
/** * Copyright (C) 2005 - 2013 Eric Van Dewoestine * * 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 3 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, see <http://www.gnu.org/licenses/>. */ package org.eclim.command; import java.util.ArrayList; import java.util.Collection; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.GnuParser; import org.apache.commons.cli.Option; import org.apache.commons.cli.OptionBuilder; import org.apache.commons.lang.StringUtils; import org.eclim.Services; /** * Class for defining and working with all the eclim command * line options. * * @author Eric Van Dewoestine */ @SuppressWarnings("static-access") public class Options { public static final String COMMAND_OPTION = "command"; public static final String PRETTY_OPTION = "pretty"; public static final String EDITOR_OPTION = "editor"; public static final String ACTION_OPTION = "a"; public static final String APPLY_OPTION = "a"; public static final String ARGS_OPTION = "a"; public static final String BASEDIR_OPTION = "b"; public static final String BUILD_OPTION = "b"; public static final String BUILD_FILE_OPTION = "b"; public static final String CASE_INSENSITIVE_OPTION = "i"; public static final String CLASSNAME_OPTION = "c"; public static final String CONTEXT_OPTION = "x"; public static final String DEBUG_OPTION = "d"; public static final String DELIMETER_OPTION = "d"; public static final String DEPENDS_OPTION = "d"; public static final String DEST_OPTION = "d"; public static final String DIR_OPTION = "d"; public static final String ENCODING_OPTION = "e"; public static final String EXCLUDES_OPTION = "e"; public static final String ERRORS_OPTION = "e"; public static final String FAMILY_OPTION = "f"; public static final String FILE_OPTION = "f"; public static final String FOLDER_OPTION = "f"; public static final String HELP = "help"; public static final String HALT_OPTION = "h"; public static final String INDENT_OPTION = "i"; public static final String INDEXED_OPTION = "i"; public static final String JARS_OPTION = "j"; public static final String LANG_OPTION = "l"; public static final String LAYOUT_OPTION = "l"; public static final String LENGTH_OPTION = "l"; public static final String LINE_OPTION = "l"; public static final String LINE_WIDTH_OPTION = "w"; public static final String METHOD_OPTION = "m"; public static final String NAME_OPTION = "n"; public static final String NATURE_OPTION = "n"; public static final String OFFSET_OPTION = "o"; public static final String PATH_OPTION = "p"; public static final String PATTERN_OPTION = "p"; public static final String PEEK_OPTION = "p"; public static final String PROJECT_OPTION = "p"; public static final String PROPERTIES_OPTION = "r"; public static final String REVISION_OPTION = "r"; public static final String SCHEMA_OPTION = "s"; public static final String SCOPE_OPTION = "s"; public static final String SEARCH_OPTION = "s"; public static final String SETTINGS_OPTION = "s"; public static final String SETTING_OPTION = "s"; public static final String SOURCE_OPTION = "s"; public static final String SUPERTYPE_OPTION = "s"; public static final String TEMPLATE_OPTION = "t"; public static final String TEST_OPTION = "t"; public static final String TYPE_OPTION = "t"; public static final String URL_OPTION = "u"; public static final String VALIDATE_OPTION = "v"; public static final String VALUE_OPTION = "v"; public static final String VALUES_OPTION = "v"; public static final String VARIABLE_OPTION = "v"; private static final String ANY = "ANY"; private static final String ARG = "ARG"; private static final String REQUIRED = "REQUIRED"; private static org.apache.commons.cli.Options coreOptions = new org.apache.commons.cli.Options(); static { coreOptions.addOption(OptionBuilder.withArgName(COMMAND_OPTION).isRequired(true).hasArg() .withDescription(Services.getMessage("command.description")).create(COMMAND_OPTION)); coreOptions.addOption(OptionBuilder.withArgName(PRETTY_OPTION) .withDescription(Services.getMessage("pretty.description")).create(PRETTY_OPTION)); coreOptions.addOption(OptionBuilder.withArgName(EDITOR_OPTION).hasArg() .withDescription(Services.getMessage("editor.description")).create(EDITOR_OPTION)); } protected org.apache.commons.cli.Options options = new org.apache.commons.cli.Options(); /** * The user supplied command line args. */ protected CommandLine commandLine; /** * Creates and initializes the jmpc command line options. */ public Options() { @SuppressWarnings("unchecked") Collection<Option> opts = coreOptions.getOptions(); for (Option option : opts) { options.addOption(option); } } /** * Parses the supplied command line options. * * @param args The arguments. * * @return The command line. */ public CommandLine parse(String[] args) throws Exception { // manually parse out the command option value so that the command specific // options can be added before running the automated parse. String commandName = null; for (int ii = 0; ii < args.length; ii++) { if (args[ii].equals('-' + COMMAND_OPTION)) { if (args.length > ii + 1) { commandName = args[ii + 1].trim(); } break; } } Command command = null; if (commandName != null) { command = Services.getCommand(commandName); if (command == null) { throw new RuntimeException(Services.getMessage("command.not.found", commandName)); } org.eclim.annotation.Command info = (org.eclim.annotation.Command) command.getClass() .getAnnotation(org.eclim.annotation.Command.class); Collection<Option> commandOptions = parseOptions(info.options()); for (Option option : commandOptions) { options.addOption(option); } } CommandLineParser parser = new GnuParser(); return new CommandLine(command, parser.parse(options, args), args); } /** * Parses the String representation of the options to a Collection of Options. * * @param optionsString The options String. * @return The Collection of Option instances. */ public Collection<Option> parseOptions(String optionsString) { ArrayList<Option> options = new ArrayList<Option>(); if (optionsString != null && optionsString.trim().length() > 0) { String[] lines = StringUtils.split(optionsString, ','); for (int ii = 0; ii < lines.length; ii++) { if (lines[ii].trim().length() > 0) { options.add(parseOption(lines[ii].trim())); } } } return options; } /** * Parses the String representation of an Option to an Option instance. * * @param option The option String. * @return The Option. */ public Option parseOption(String option) { String[] parts = StringUtils.split(option); // command can have any additional arguments. //if(parts.length == 1 && ANY.equals(parts[0])){ //} if (REQUIRED.equals(parts[0])) { OptionBuilder.isRequired(); } if (ARG.equals(parts[3])) { OptionBuilder.hasArg(); //OptionBuilder.withArgName(parts[2]); } else if (ANY.equals(parts[3])) { OptionBuilder.hasOptionalArgs(); } OptionBuilder.withLongOpt(parts[2]); return OptionBuilder.create(parts[1]); } }