/* * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//cli/src/java/org/apache/commons/cli/PosixParser.java,v 1.2 2002/06/19 21:31:16 jkeyes Exp $ * $Revision: 1.2 $ * $Date: 2002/06/19 21:31:16 $ * * ==================================================================== * * The Apache Software License, Version 1.1 * * Copyright (c) 1999-2001 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. 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. * * 3. 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For more * information on the Apache Software Foundation, please see * . * */ package org.apache.commons.cli; import java.util.Iterator; import java.util.LinkedList; import java.util.List; /** * PosixParser parses the command line arguments using the Posix style. * For example, -buildfile can only be interpreted as the option * 'b' with value 'uildfile' or it could be interpreted as the options * 'b','u','i','l','d','f','i','l','e'. * * @author John Keyes (jbjk at mac.com) */ public class PosixParser implements CommandLineParser { /** * Parse the arguments according to the specified options. * @param options the specified Options * @param arguments the command line arguments * @return the list of atomic option and value tokens */ public List parse( Options options, List arguments ) { return parse( options, arguments, false ); } /** * Parse the arguments according to the specified options. * @param options the specified Options * @param arguments the command line arguments * @param stopAtNonOption specifies whether to continue parsing the * arguments if a non option is encountered. * @return the list of atomic option and value tokens */ public List parse( Options options, List arguments, boolean stopAtNonOption ) { List args = new LinkedList(); Iterator argIter = arguments.iterator(); String eachArg = null; boolean eatTheRest = false; while ( argIter.hasNext() ) { eachArg = (String) argIter.next(); if ( eachArg.equals("--") ) { // Look for -- to indicate end-of-options, and // just stuff it, along with everything past it // into the returned list. args.add( eachArg ); eatTheRest = true; } else if ( eachArg.startsWith("--") ) { // It's a long-option, so doesn't need any // bursting applied to it. args.add( eachArg ); } else if ( eachArg.startsWith("-") ) { // It might be a short arg needing // some bursting if ( eachArg.length() == 1) { // It's not really an option, so // just drop it on the list if ( stopAtNonOption ) { eatTheRest = true; } else { args.add( eachArg ); } } else if ( eachArg.length() == 2 ) { // No bursting required args.add( eachArg ); } else { // Needs bursting. Figure out // if we have multiple options, // or maybe an option plus an arg, // or some combination thereof. for ( int i = 1 ; i < eachArg.length() ; ++i ) { String optStr = "-" + eachArg.charAt(i); Option opt = (Option) options.getOption( String.valueOf( eachArg.charAt(i) ) ); if ( (opt != null) && (opt.hasArg()) ) { // If the current option has an argument, // then consider the rest of the eachArg // to be that argument. args.add( optStr ); if ( (i+1) < eachArg.length() ) { String optArg = eachArg.substring(i+1); args.add( optArg ); } break; } else { // No argument, so prepend the single dash, // and then drop it into the arglist. args.add( optStr ); } } } } else { // It's just a normal non-option arg, // so dump it into the list of returned // values. args.add( eachArg ); if ( stopAtNonOption ) { eatTheRest = true; } } if ( eatTheRest ) { while ( argIter.hasNext() ) { args.add( argIter.next() ); } } } return args; } }