net.sourceforge.argparse4j.impl.action

Class AppendConstArgumentAction

java.lang.Object

net.sourceforge.argparse4j.impl.action.AppendConstArgumentAction

All Implemented Interfaces:

ArgumentAction

public class AppendConstArgumentAction
extends Object
implements ArgumentAction

Argument action to store a list.

This action appends the value specified by Argument.setConst(Object) to the list. (Note that the const value defaults to null.) The list is of type List. This action is typically useful when multiple arguments need to store constants to the same list. If attrs contains non-List object for key Argument.getDest(), it will be overwritten by the List containing value. consumeArgument() always returns false.

Constructor Summary

Constructors

Constructor and Description
AppendConstArgumentAction()

Method Summary

Modifier and Type	Method and Description
boolean	consumeArgument() Returns true if this action consumes argument.
void	onAttach(Argument arg) Called when ArgumentAction is added to Argument using Argument.action(ArgumentAction).
void	run(ArgumentParser parser, Argument arg, Map<String,Object> attrs, String flag, Object value) Executes this action.

Methods inherited from class java.lang.Object

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

Constructor Detail

AppendConstArgumentAction

public AppendConstArgumentAction()

Method Detail

run

public void run(ArgumentParser parser,
                Argument arg,
                Map<String,Object> attrs,
                String flag,
                Object value)
         throws ArgumentParserException

Description copied from interface: ArgumentAction

Executes this action.

If the objects derived from RuntimeException are thrown in this method because of invalid input from command line, subclass must catch these exceptions and wrap them in ArgumentParserException and give simple error message to explain what happened briefly.

Specified by:

run in interface ArgumentAction

Parameters:

parser - The parser.

arg - The argument this action attached to.

attrs - Map to store attributes.

flag - The actual option flag in command line if arg is a named arguments. null if arg is a positional argument.

value - The attribute value. This may be null if this action does not consume any arguments.

Throws:

ArgumentParserException - If error occurred.

consumeArgument

public boolean consumeArgument()

Description copied from interface: ArgumentAction

Returns true if this action consumes argument. Otherwise returns false.

Specified by:

consumeArgument in interface ArgumentAction

Returns:

true or false.

onAttach

public void onAttach(Argument arg)

Description copied from interface: ArgumentAction

Called when ArgumentAction is added to Argument using Argument.action(ArgumentAction).

Specified by:

onAttach in interface ArgumentAction

Parameters:

arg - Argument object to which this object is added.