org.unix4j.unix.find

Class OptionableUtil

java.lang.Object

org.unix4j.unix.find.OptionableUtil

class OptionableUtil
extends Object

Method Summary

Modifier and Type	Method and Description
static <O extends Option,E extends Enum<E> & Optionable<O>> E	findEnumByOption(Class<E> enumClass, O option) Finds an enum constant by a given option through the enum/option association given by the Optionable interface implemented by the enum.
static <O extends Option,E extends Enum<E> & Optionable<O>> E	findFirstEnumByOptionInSet(Class<E> enumClass, OptionSet<O> optionSet, E defaultEnum) Finds an enum constant by a comparing the options associated with the enum constant with the options in the specified set.

Methods inherited from class java.lang.Object

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

Method Detail

findEnumByOption

public static <O extends Option,E extends Enum<E> & Optionable<O>> E findEnumByOption(Class<E> enumClass,
                                                                                      O option)

Finds an enum constant by a given option through the enum/option association given by the Optionable interface implemented by the enum. If no enum constant is found for the given option, null is returned.

Type Parameters:

O - the option type

E - the enum type

Parameters:

enumClass - the enum class

option - the option to look for

Returns:

the enum constant that is associated with the given option

findFirstEnumByOptionInSet

public static <O extends Option,E extends Enum<E> & Optionable<O>> E findFirstEnumByOptionInSet(Class<E> enumClass,
                                                                                                OptionSet<O> optionSet,
                                                                                                E defaultEnum)

Finds an enum constant by a comparing the options associated with the enum constant with the options in the specified set. The enum/option association is defined by the Optionable interface implemented by the enum.

If no enum constant is found with an associated option in the given set, the specified defaultEnum value is returned. If multiple enum constants have an associated option in the given set, the first enum with such an option is returned.

Type Parameters:

O - the option type

E - the enum type

Parameters:

enumClass - the enum class

optionSet - the option set to lookup associated options

defaultEnum - the default enum value returned if no enum has an associated option in the given option set

Returns:

the enum constant that is associated with the given option