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 invalid input: '<'[email protected]>

Field Summary

Fields

Modifier and Type	Field	Description
static final String	VALUE_OF

Method Summary

Modifier and Type	Method	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. has a static 'valueOf' method taking a single String as argument).

Methods inherited from class Object

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

Field Details

VALUE_OF

public static final String VALUE_OF

See Also:

• Constant Field Values

Method Details

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.