1 /*

     2  * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 /*

    27  * This file is available under and governed by the GNU General Public

    28  * License version 2 only, as published by the Free Software Foundation.

    29  * However, the following notice accompanied the original version of this

    30  * file:

    31  *

    32  * The MIT License

    33  *

    34  * Copyright (c) 2004-2014 Paul R. Holser, Jr.

    35  *

    36  * Permission is hereby granted, free of charge, to any person obtaining

    37  * a copy of this software and associated documentation files (the

    38  * "Software"), to deal in the Software without restriction, including

    39  * without limitation the rights to use, copy, modify, merge, publish,

    40  * distribute, sublicense, and/or sell copies of the Software, and to

    41  * permit persons to whom the Software is furnished to do so, subject to

    42  * the following conditions:

    43  *

    44  * The above copyright notice and this permission notice shall be

    45  * included in all copies or substantial portions of the Software.

    46  *

    47  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

    48  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

    49  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

    50  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

    51  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

    52  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

    53  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

    54  */

    55 

    56 package jdk.internal.joptsimple;

    57 

    58 import java.util.Collection;

    59 

    60 import static java.lang.Character.*;

    61 

    62 /**

    63  * Can tell whether or not options are well-formed.

    64  *

    65  * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>

    66  */

    67 final class ParserRules {

    68     static final char HYPHEN_CHAR = '-';

    69     static final String HYPHEN = String.valueOf( HYPHEN_CHAR );

    70     static final String DOUBLE_HYPHEN = "--";

    71     static final String OPTION_TERMINATOR = DOUBLE_HYPHEN;

    72     static final String RESERVED_FOR_EXTENSIONS = "W";

    73 

    74     private ParserRules() {

    75         throw new UnsupportedOperationException();

    76     }

    77 

    78     static boolean isShortOptionToken( String argument ) {

    79         return argument.startsWith( HYPHEN )

    80             && !HYPHEN.equals( argument )

    81             && !isLongOptionToken( argument );

    82     }

    83 

    84     static boolean isLongOptionToken( String argument ) {

    85         return argument.startsWith( DOUBLE_HYPHEN ) && !isOptionTerminator( argument );

    86     }

    87 

    88     static boolean isOptionTerminator( String argument ) {

    89         return OPTION_TERMINATOR.equals( argument );

    90     }

    91 

    92     static void ensureLegalOption( String option ) {

    93         if ( option.startsWith( HYPHEN ) )

    94             throw new IllegalOptionSpecificationException( String.valueOf( option ) );

    95 

    96         for ( int i = 0; i < option.length(); ++i )

    97             ensureLegalOptionCharacter( option.charAt( i ) );

    98     }

    99 

   100     static void ensureLegalOptions( Collection<String> options ) {

   101         for ( String each : options )

   102             ensureLegalOption( each );

   103     }

   104 

   105     private static void ensureLegalOptionCharacter( char option ) {

   106         if ( !( isLetterOrDigit( option ) || isAllowedPunctuation( option ) ) )

   107             throw new IllegalOptionSpecificationException( String.valueOf( option ) );

   108     }

   109 

   110     private static boolean isAllowedPunctuation( char option ) {

   111         String allowedPunctuation = "?." + HYPHEN_CHAR;

   112         return allowedPunctuation.indexOf( option ) != -1;

   113     }

   114 }