/*** Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.*/
packageorg.apache.commons.cli;/*** Validates an Option string.
*
*@version$Id: OptionValidator.java 1544819 2013-11-23 15:34:31Z tn $
*@since1.1*/
final classOptionValidator
{/*** Validates whether opt is a permissible Option
* shortOpt. The rules that specify if the opt
* is valid are:
*
*
*
a single characteropt that is either* ' '(special case), '?', '@' or a letter
*
a multi characteropt that only contains* letters.
*
*
* In case {@codeopt} is {@codenull} no further validation is performed.
*
*@paramopt The option string to validate, may be null
*@throwsIllegalArgumentException if the Option is not valid.*/
static void validateOption(String opt) throwsIllegalArgumentException
{//if opt is NULL do not check further
if (opt == null)
{return;
}//handle the single character opt
if (opt.length() == 1)
{char ch = opt.charAt(0);if (!isValidOpt(ch))
{throw new IllegalArgumentException("Illegal option name '" + ch + "'");
}
}//handle the multi character opt
else{for (charch : opt.toCharArray())
{if (!isValidChar(ch))
{throw new IllegalArgumentException("The option '" + opt + "' contains an illegal "
+ "character : '" + ch + "'");
}
}
}
}/*** Returns whether the specified character is a valid Option.
*
*@paramc the option to validate
*@returntrue if c is a letter, '?' or '@', otherwise false.*/
private static boolean isValidOpt(charc)
{return isValidChar(c) || c == '?' || c == '@';
}/*** Returns whether the specified character is a valid character.
*
*@paramc the character to validate
*@returntrue if c is a letter.*/
private static boolean isValidChar(charc)
{returnCharacter.isJavaIdentifierPart(c);
}
}