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/*
The MIT License
Copyright (c) 2009 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.Collection;
import java.util.List;
/**
* Describes options that an option parser recognizes.
*
* Instances of this interface are returned by the "fluent interface" methods to allow
* retrieval of option arguments in a type-safe manner. Here's an example:
*
* OptionParser parser = new OptionParser();
* OptionSpec<Integer> count =
* parser.accepts( "count" ).withRequiredArg().ofType( Integer.class );
* OptionSet options = parser.parse( "--count", "2" );
* assert options.has( count );
* int countValue = options.valueOf( count );
* assert countValue == count.value( options );
* List<Integer> countValues = options.valuesOf( count );
* assert countValues.equals( count.values( options ) );
*
*
* @param represents the type of the arguments this option accepts
* @author Paul Holser
* @version $Id: OptionSpec.java,v 1.24 2009/10/04 00:18:36 pholser Exp $
*/
public interface OptionSpec {
/**
* Gives any arguments associated with the given option in the given set of
* detected options.
*
* Specifying a {@linkplain ArgumentAcceptingOptionSpec#defaultsTo(Object, Object...) default argument value}
* for this option will cause this method to return that default value even if this option was not detected on the
* command line, or if this option can take an optional argument but did not have one on the command line.
*
* @param detectedOptions the detected options to search in
* @return the arguments associated with this option; an empty list if no such
* arguments are present, or if this option was not detected
* @throws OptionException if there is a problem converting this option's arguments
* to the desired type; for example, if the type does not implement a correct
* conversion constructor or method
* @throws NullPointerException if {@code detectedOptions} is {@code null}
* @see OptionSet#valuesOf(OptionSpec)
*/
List values( OptionSet detectedOptions );
/**
* Gives the argument associated with the given option in the given set of
* detected options.
*
* Specifying a {@linkplain ArgumentAcceptingOptionSpec#defaultsTo(Object, Object...) default argument value}
* for this option will cause this method to return that default value even if this option was not detected on the
* command line, or if this option can take an optional argument but did not have one on the command line.
*
* @param detectedOptions the detected options to search in
* @return the argument of the this option; {@code null} if no argument is present,
* or that option was not detected
* @throws OptionException if more than one argument was detected for the option
* @throws NullPointerException if {@code detectedOptions} is {@code null}
* @throws ClassCastException if the arguments of this option are not of the
* expected type
* @see OptionSet#valueOf(OptionSpec)
*/
V value( OptionSet detectedOptions );
/**
* @return the string representations of this option
*/
Collection options();
}