gnu.getopt
Class LongOpt

java.lang.Object
  gnu.getopt.LongOpt

public class LongOpt
extends Object

This object represents the definition of a long option in the Java port of GNU getopt. An array of LongOpt objects is passed to the Getopt object to define the list of valid long options for a given parsing session. Refer to the getopt documentation for details on the format of long options.

Version:

1.0.5

Author:

Aaron M. Renn (arenn@urbanophile.com)

See Also:

Getopt

Field Summary

protected StringBuffer	flag If this variable is not null, then the value stored in "val" is stored here when this long option is encountered.
protected int	has_arg Indicates whether the option has no argument, a required argument, or an optional argument.
protected String	name The name of the long option
static int	NO_ARGUMENT Constant value used for the "has_arg" constructor argument.
static int	OPTIONAL_ARGUMENT Constant value used for the "has_arg" constructor argument.
static int	REQUIRED_ARGUMENT Constant value used for the "has_arg" constructor argument.
protected int	val The value to store in "flag" if flag is not null, otherwise the equivalent short option character for this long option.

Constructor Summary

LongOpt(String name, int has_arg, StringBuffer flag, int val)
Create a new LongOpt object with the given parameter values.

Method Summary

StringBuffer	getFlag() Returns the value of the 'flag' field for this long option
int	getHasArg() Returns the value set for the 'has_arg' field for this long option
String	getName() Returns the name of this LongOpt as a String
int	getVal() Returns the value of the 'val' field for this long option

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NO_ARGUMENT

public static final int NO_ARGUMENT

Constant value used for the "has_arg" constructor argument. This value indicates that the option takes no argument.

See Also:

Constant Field Values

REQUIRED_ARGUMENT

public static final int REQUIRED_ARGUMENT

Constant value used for the "has_arg" constructor argument. This value indicates that the option takes an argument that is required.

See Also:

Constant Field Values

OPTIONAL_ARGUMENT

public static final int OPTIONAL_ARGUMENT

Constant value used for the "has_arg" constructor argument. This value indicates that the option takes an argument that is optional.

See Also:

Constant Field Values

name

protected String name

The name of the long option

has_arg

protected int has_arg

Indicates whether the option has no argument, a required argument, or an optional argument.

flag

protected StringBuffer flag

If this variable is not null, then the value stored in "val" is stored here when this long option is encountered. If this is null, the value stored in "val" is treated as the name of an equivalent short option.

val

protected int val

The value to store in "flag" if flag is not null, otherwise the equivalent short option character for this long option.

Constructor Detail

LongOpt

public LongOpt(String name,
               int has_arg,
               StringBuffer flag,
               int val)
        throws IllegalArgumentException

Create a new LongOpt object with the given parameter values. If the value passed as has_arg is not valid, then an exception is thrown.

Parameters:

name - The long option String.

has_arg - Indicates whether the option has no argument (NO_ARGUMENT), a required argument (REQUIRED_ARGUMENT) or an optional argument (OPTIONAL_ARGUMENT).

flag - If non-null, this is a location to store the value of "val" when this option is encountered, otherwise "val" is treated as the equivalent short option character.

val - The value to return for this long option, or the equivalent single letter option to emulate if flag is null.

Throws:

IllegalArgumentException - If the has_arg param is not one of NO_ARGUMENT, REQUIRED_ARGUMENT or OPTIONAL_ARGUMENT.

Method Detail

getName

public String getName()

Returns the name of this LongOpt as a String

Returns:

Then name of the long option

getHasArg

public int getHasArg()

Returns the value set for the 'has_arg' field for this long option

Returns:

The value of 'has_arg'

getFlag

public StringBuffer getFlag()

Returns the value of the 'flag' field for this long option

Returns:

The value of 'flag'

getVal

public int getVal()

Returns the value of the 'val' field for this long option

Returns:

The value of 'val'