Interface CheckedFunction<T,R>

Type Parameters:
T - the type of the input to the function
R - the type of the result of the function
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@NullMarked @FunctionalInterface public interface CheckedFunction<T,R>
A functional interface representing a function that accepts one argument, produces a result, and may throw a checked exception. This is a variation of the standard Function interface, intended for use in scenarios where the operation may involve checked exceptions.

Used by Resource.use(CheckedFunction) to execute a body function against an acquired resource within a managed Try scope.

The rationale for providing checked variants of the standard functional interfaces (and the choice of throws Exception over throws Throwable) is documented in ADR-019 — CheckedFunction, CheckedSupplier, CheckedRunnable, CheckedConsumer as first-class interfaces.

  • Method Summary

    Modifier and Type
    Method
    Description
    R
    apply(T t)
    Applies this function to the given argument, potentially throwing a checked exception.

  • Method Details

    • apply

      R apply(T t) throws Exception
      Applies this function to the given argument, potentially throwing a checked exception.
      Parameters:
      t - the function argument
      Returns:
      the function result
      Throws:
      Exception - if an error occurs during the application