Class ConstructorBasedConverter<T>

java.lang.Object

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

All Implemented Interfaces:

Converter<T>

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

This 'default' converter tries to create objects using a constructor taking a single String argument. Be aware that implementation must also handle the case where the input is null.

Author:

Clement Escoffier invalid input: '<'[email protected]>

Method Summary

Modifier and Type	Method	Description
T	fromString(String input)	Converts the given input to an object by using the constructor approach.
static <T> ConstructorBasedConverter<T>	getIfEligible(Class<T> clazz)	Checks whether the given class can be used by the ConstructorBasedConverter (i.e. has a constructor taking a single String as argument).

Methods inherited from class Object

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

Method Details

getIfEligible

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

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

Parameters:

clazz - the class

Returns:

a ConstructorBasedConverter 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 constructor approach. Notice that the constructor must expect receiving 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.