content: /*
   * Copyright (c) 2013 3 Round Stones Inc., Some Rights Reserved
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  package org.callimachusproject.cli;
  
  import org.apache.commons.cli.CommandLine;
  import org.apache.commons.cli.GnuParser;
  import org.apache.commons.cli.Option;
  import org.apache.commons.cli.Options;
  import org.apache.commons.cli.ParseException;
  
  public class CommandSet {
  	private final String name;
  	private final Options options = new Options();
  	private String otherArgName;
  	private CommandLine line;
  
  	public CommandSet(String version) {
  		this.name = version;
  	}
  
  	public CommandOption require(String opt) {
  		Option option = new Option(opt, opt);
  		option.setRequired(true);
  		return new CommandOption(option);
  	}
  
  	public CommandOption require(String opt, String longOpt) {
  		Option option = new Option(opt, longOpt);
  		if (!opt.equals(longOpt)) {
  			option.setLongOpt(longOpt);
  		}
  		option.setRequired(true);
  		return new CommandOption(option);
  	}
  
  	public CommandOption option(String opt) {
  		Option option = new Option(opt, opt);
  		return new CommandOption(option);
  	}
  
  	public CommandOption option(String opt, String longOpt) {
  		Option option = new Option(opt, longOpt);
  		if (!opt.equals(longOpt)) {
  			option.setLongOpt(longOpt);
  		}
  		return new CommandOption(option);
  	}
  
  	public void other(String argName) {
  		this.otherArgName = argName;
  	}
  
  	public synchronized Command parse(String[] args) {
  		try {
  			line = new GnuParser() {
  				public CommandLine parse(Options options, String[] arguments)
  						throws ParseException {
  					try {
  						return super.parse(options, arguments);
  					} catch (ParseException e) {
  						line = this.cmd;
  						throw e;
  					}
  				};
  			}.parse(options, args);
  			return new Command(name, options, otherArgName, line);
  		} catch (ParseException e) {
  			return new Command(name, options, otherArgName, line, e);
  		} finally {
  			line = null;
  		}
  	}
  
  	public class CommandOption {
  		private final Option option;
  
  		protected CommandOption(Option option) {
  			this.option = option;
  		}
  
  		public CommandOption arg(String argName) {
  			option.setArgName(argName);
  			option.setArgs(1);
  			option.setOptionalArg(false);
  			return this;
  		}
  
  		public CommandOption optional(String argName) {
  			option.setArgName(argName);
  			option.setArgs(1);
  			option.setOptionalArg(true);
  			return this;
  		}
  
  		public void desc(String description) {
  			option.setDescription(description);
  			options.addOption(option);
  		}
  	}
  }
  