joptsimple
Class OptionSpecBuilder

java.lang.Object
  joptsimple.OptionSpecBuilder

All Implemented Interfaces:

OptionSpec<Void>

public class OptionSpecBuilder
extends Object

Allows callers to specify whether a given option accepts arguments (required or optional).

Instances are returned from OptionParser.accepts(String) to allow the formation of parser directives as sentences in a "fluent interface" language. For example:

   OptionParser parser = new OptionParser();
   parser.accepts( "c" ).withRequiredArg().ofType( Integer.class );
 

If no methods are invoked on an instance of this class, then that instance's option will accept no argument.

Note that you should not use the fluent interface clauses in a way that would defeat the typing of option arguments:

   OptionParser parser = new OptionParser();
   ArgumentAcceptingOptionSpec<String> optionC =
       parser.accepts( "c" ).withRequiredArg();
   optionC.ofType( Integer.class );  // DON'T THROW AWAY THE TYPE!

   String value = parser.parse( "-c", "2" ).valueOf( optionC );  // ClassCastException
 

Author:

Paul Holser

Method Summary

protected Void	convert(String argument)
boolean	equals(Object that)
int	hashCode()
Collection<String>	options()
String	toString()
V	value(OptionSet detectedOptions) Gives the argument associated with the given option in the given set of detected options.
List<V>	values(OptionSet detectedOptions) Gives any arguments associated with the given option in the given set of detected options.
ArgumentAcceptingOptionSpec<String>	withOptionalArg() Informs an option parser that this builder's option accepts an optional argument.
ArgumentAcceptingOptionSpec<String>	withRequiredArg() Informs an option parser that this builder's option requires an argument.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

withRequiredArg

public ArgumentAcceptingOptionSpec<String> withRequiredArg()

Informs an option parser that this builder's option requires an argument.

Returns:

a specification for the option

withOptionalArg

public ArgumentAcceptingOptionSpec<String> withOptionalArg()

Informs an option parser that this builder's option accepts an optional argument.

Returns:

a specification for the option

convert

protected Void convert(String argument)

options

public final Collection<String> options()

Specified by:

options in interface OptionSpec<V>

Returns:

the string representations of this option

values

public final List<V> values(OptionSet detectedOptions)

Description copied from interface: OptionSpec

Gives any arguments associated with the given option in the given set of detected options.

Specifying a 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.

Specified by:

values in interface OptionSpec<V>

Parameters:

detectedOptions - the detected options to search in

Returns:

the arguments associated with this option; an empty list if no such arguments are present, or if this option was not detected

See Also:

OptionSet.valuesOf(OptionSpec)

value

public final V value(OptionSet detectedOptions)

Description copied from interface: OptionSpec

Gives the argument associated with the given option in the given set of detected options.

Specifying a 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.

Specified by:

value in interface OptionSpec<V>

Parameters:

detectedOptions - the detected options to search in

Returns:

the argument of the this option; null if no argument is present, or that option was not detected

See Also:

OptionSet.valueOf(OptionSpec)

equals

public boolean equals(Object that)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object