io.vertx.core.cli.converters

Class ValueOfBasedConverter<T>

java.lang.Object

io.vertx.core.cli.converters.ValueOfBasedConverter<T>

All Implemented Interfaces:

Converter<T>

public final class ValueOfBasedConverter<T>
extends Object
implements Converter<T>

This 'default' converter tries to create objects using a static 'valueOf' method taking a single String argument. This converter is particularly convenient to for enumeration and primitive types.

Author:

Clement Escoffier

Field Summary

Fields

Modifier and Type	Field and Description
static String	VALUE_OF

Method Summary

Modifier and Type	Method and Description
T	fromString(String input) Converts the given input to an object by using the 'valueOf' method.
static <T> ValueOfBasedConverter<T>	getIfEligible(Class<T> clazz) Checks whether the given class can be used by the ValueOfBasedConverter (i.e.

Methods inherited from class java.lang.Object

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

Field Detail

VALUE_OF

public static final String VALUE_OF

See Also:

Constant Field Values

Method Detail

getIfEligible

public static <T> ValueOfBasedConverter<T> getIfEligible(Class<T> clazz)

Checks whether the given class can be used by the ValueOfBasedConverter (i.e. has a static 'valueOf' method taking a single String as argument). If so, creates a new instance of converter for this type.

Parameters:

clazz - the class

Returns:

a ValueOfBasedConverter if the given class is eligible, null otherwise.

fromString

public T fromString(String input)
             throws IllegalArgumentException

Converts the given input to an object by using the 'valueOf' method. Notice that the method may receive a null value.

Specified by:

fromString in interface Converter<T>

Parameters:

input - the input, can be null

Returns:

the instance of T

Throws:

IllegalArgumentException - if the instance of T cannot be created from the input.