| /* |
| The MIT License |
| |
| Copyright (c) 2004-2015 Paul R. Holser, Jr. |
| |
| Permission is hereby granted, free of charge, to any person obtaining |
| a copy of this software and associated documentation files (the |
| "Software"), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice shall be |
| included in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| package joptsimple; |
| |
| import java.util.NoSuchElementException; |
| |
| import static joptsimple.ParserRules.*; |
| |
| /** |
| * Tokenizes a short option specification string. |
| * |
| * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a> |
| */ |
| class OptionSpecTokenizer { |
| private static final char POSIXLY_CORRECT_MARKER = '+'; |
| private static final char HELP_MARKER = '*'; |
| |
| private String specification; |
| private int index; |
| |
| OptionSpecTokenizer( String specification ) { |
| if ( specification == null ) |
| throw new NullPointerException( "null option specification" ); |
| |
| this.specification = specification; |
| } |
| |
| boolean hasMore() { |
| return index < specification.length(); |
| } |
| |
| AbstractOptionSpec<?> next() { |
| if ( !hasMore() ) |
| throw new NoSuchElementException(); |
| |
| |
| String optionCandidate = String.valueOf( specification.charAt( index ) ); |
| index++; |
| |
| AbstractOptionSpec<?> spec; |
| if ( RESERVED_FOR_EXTENSIONS.equals( optionCandidate ) ) { |
| spec = handleReservedForExtensionsToken(); |
| |
| if ( spec != null ) |
| return spec; |
| } |
| |
| ensureLegalOption( optionCandidate ); |
| |
| if ( hasMore() ) { |
| boolean forHelp = false; |
| if ( specification.charAt( index ) == HELP_MARKER ) { |
| forHelp = true; |
| ++index; |
| } |
| spec = hasMore() && specification.charAt( index ) == ':' |
| ? handleArgumentAcceptingOption( optionCandidate ) |
| : new NoArgumentOptionSpec( optionCandidate ); |
| if ( forHelp ) |
| spec.forHelp(); |
| } else |
| spec = new NoArgumentOptionSpec( optionCandidate ); |
| |
| return spec; |
| } |
| |
| void configure( OptionParser parser ) { |
| adjustForPosixlyCorrect( parser ); |
| |
| while ( hasMore() ) |
| parser.recognize( next() ); |
| } |
| |
| private void adjustForPosixlyCorrect( OptionParser parser ) { |
| if ( POSIXLY_CORRECT_MARKER == specification.charAt( 0 ) ) { |
| parser.posixlyCorrect( true ); |
| specification = specification.substring( 1 ); |
| } |
| } |
| |
| private AbstractOptionSpec<?> handleReservedForExtensionsToken() { |
| if ( !hasMore() ) |
| return new NoArgumentOptionSpec( RESERVED_FOR_EXTENSIONS ); |
| |
| if ( specification.charAt( index ) == ';' ) { |
| ++index; |
| return new AlternativeLongOptionSpec(); |
| } |
| |
| return null; |
| } |
| |
| private AbstractOptionSpec<?> handleArgumentAcceptingOption( String candidate ) { |
| index++; |
| |
| if ( hasMore() && specification.charAt( index ) == ':' ) { |
| index++; |
| return new OptionalArgumentOptionSpec<String>( candidate ); |
| } |
| |
| return new RequiredArgumentOptionSpec<String>( candidate ); |
| } |
| } |