Package io.vertx.core.cli.converters

## 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

- - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    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 java.lang.Object

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

- - ### Method Detail

    - #### 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.