/*
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.
List;
import static java.lang.
Character.*;
/**
* Can tell whether or not options are well-formed.
*
* @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>
*/
final class
ParserRules {
static final char
HYPHEN_CHAR = '-';
static final
String HYPHEN =
String.
valueOf(
HYPHEN_CHAR );
static final
String DOUBLE_HYPHEN = "--";
static final
String OPTION_TERMINATOR =
DOUBLE_HYPHEN;
static final
String RESERVED_FOR_EXTENSIONS = "W";
private
ParserRules() {
throw new
UnsupportedOperationException();
}
static boolean
isShortOptionToken(
String argument ) {
return
argument.
startsWith(
HYPHEN )
&& !
HYPHEN.
equals(
argument )
&& !
isLongOptionToken(
argument );
}
static boolean
isLongOptionToken(
String argument ) {
return
argument.
startsWith(
DOUBLE_HYPHEN ) && !
isOptionTerminator(
argument );
}
static boolean
isOptionTerminator(
String argument ) {
return
OPTION_TERMINATOR.
equals(
argument );
}
static void
ensureLegalOption(
String option ) {
if (
option.
startsWith(
HYPHEN ) )
throw new
IllegalOptionSpecificationException(
String.
valueOf(
option ) );
for ( int
i = 0;
i <
option.
length(); ++
i )
ensureLegalOptionCharacter(
option.
charAt(
i ) );
}
static void
ensureLegalOptions(
List<
String>
options ) {
for (
String each :
options )
ensureLegalOption(
each );
}
private static void
ensureLegalOptionCharacter( char
option ) {
if ( !(
isLetterOrDigit(
option ) ||
isAllowedPunctuation(
option ) ) )
throw new
IllegalOptionSpecificationException(
String.
valueOf(
option ) );
}
private static boolean
isAllowedPunctuation( char
option ) {
String allowedPunctuation = "?._" +
HYPHEN_CHAR;
return
allowedPunctuation.
indexOf(
option ) != -1;
}
}