Module com.aoapps.lang

Package com.aoapps.lang.util

Class GetOpt

java.lang.Object

com.aoapps.lang.util.GetOpt

public final class GetOpt
extends Object

General-purpose command line argument processor. Supports options in the "--option=value" format. boolean options default to true if no value provided. Also supports a single "--" that is used to separate parameters from non-parameters. All arguments start with -- before the "--" must be valid parameters.

Author:

AO Industries, Inc.

Method Summary

Modifier and Type	Method	Description
static List<String>	getArguments(String[] args)	Gets all of the non-parameter arguments.
static <T> T	getOpt(String[] args, String name, Class<T> type)	Gets an argument of the provided type.
static <T> T	parse(String value, Class<T> type)	Parses a String value to the provided type.

Methods inherited from class java.lang.Object

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

Method Detail

parse

public static <T> T parse(String value,
                          Class<T> type)

Parses a String value to the provided type. Values are converted by:

1. Special handling for primitive types
2. public static valueOf(String) method
3. public constructor with single String parameter

getOpt

public static <T> T getOpt(String[] args,
                           String name,
                           Class<T> type)

Gets an argument of the provided type. If the argument is found multiple times, only the most recent value is used. The argument should be in the form --name= value. Boolean arguments are unique in that the value is optional, when not provided it defaults to true. "--" may be used to separate parameters from arguments.

Parameters:

args - the values used during the processing of the parameters will be set to null

Returns:

the converted value or null if not found

See Also:

parse(String, Class)

getArguments

public static List<String> getArguments(String[] args)

Gets all of the non-parameter arguments. If any arguments start with "--" and are not a valid parameter, throws IllegalArgumentException. "--" may be used to separate parameters from arguments. The "--" will be included in the arguments returned.