Class EnumStringArgumentType<T extends Enum<T>>

java.lang.Object

net.sourceforge.argparse4j.impl.type.EnumStringArgumentType<T>

Type Parameters:

T - Type of enum

All Implemented Interfaces:

ArgumentType<T>, MetavarInference

public class EnumStringArgumentType<T extends Enum<T>>
extends Object
implements ArgumentType<T>, MetavarInference

ArgumentType subclass for enum type.

Uses Enum.toString() instead of Enum.name() as the String representation of the enum. For enums that do not override Enum.toString(), this behaves the same as ReflectArgumentType.

Field Summary

Fields

Modifier and Type	Field	Description
private final Class<T>	type_

Constructor Summary

Constructors

Constructor	Description
EnumStringArgumentType(Class<T> type)

Method Summary

Modifier and Type	Method	Description
T	convert(ArgumentParser parser, Argument arg, String value)	Converts value to appropriate type.
static <T extends Enum<T>> EnumStringArgumentType<T>	forEnum(Class<T> type)	Creates an EnumStringArgumentType for the given enum type.
String[]	inferMetavar()	Infers metavar based on given type.

Methods inherited from class Object

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

Field Details

type_

private final Class<T extends Enum<T>> type_

Constructor Details

EnumStringArgumentType

public EnumStringArgumentType(Class<T> type)

Method Details

forEnum

public static <T extends Enum<T>>
EnumStringArgumentType<T> forEnum(Class<T> type)

Creates an EnumStringArgumentType for the given enum type.

Type Parameters:

T - The type of the enum

Parameters:

type - type of the enum the EnumStringArgumentType should convert to

Returns:

an EnumStringArgumentType that converts Strings to type

convert

public T convert(ArgumentParser parser,
 Argument arg,
 String value)
          throws ArgumentParserException

Description copied from interface: ArgumentType

Converts value to appropriate type.

If the objects derived from RuntimeException are thrown in conversion 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:

convert in interface ArgumentType<T extends Enum<T>>

Parameters:

parser - The parser.

arg - The argument this type attached to.

value - The attribute value.

Returns:

Converted object.

Throws:

ArgumentParserException - If conversion fails.

inferMetavar

public String[] inferMetavar()

Infers metavar based on given type.

The inferred metavar contains all enum constant string representation, obtained by calling their Object.toString() method.

Specified by:

inferMetavar in interface MetavarInference

Returns:

inferred array of metavar strings, or null if there is no metavar inferred.

Since:

0.7.0

See Also:

• MetavarInference.inferMetavar()