Type Parameters:

T - The type of the input to the function.

X - The type of checked exception that can be thrown.

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface ThrowingToLongFunction<T,X extends Throwable>
```
Represents a function that produces a long-valued result. This is a checked-exception throwing equivalent of ToLongFunction.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`long`	`applyAsLong(T value)`	Applies this function to the given argument.
`static <T,X extends Throwable> ThrowingToLongFunction<T,X>`	`checked(ToLongFunction<? super T> function)`	Returns a function that applies the `function` function to its input.
`static <T,X extends Throwable> ThrowingToLongFunction<T,X>`	`checked(ToLongFunction<? super T> function, Class<X> errorType)`	Returns a function that applies the `function` function to its input.
`static <T,X extends Throwable> ThrowingToLongFunction<T,X>`	`of(ThrowingToLongFunction<T,X> function)`	Factory method for turning `ThrowingToLongFunction`-shaped lambdas into `ThrowingToLongFunctions`.
`default <E extends Throwable> ThrowingToLongFunction<T,E>`	`onErrorApplyChecked(ThrowingToLongFunction<? super T,? extends E> fallback)`	Returns a function that applies this function to its input.
`default ToLongFunction<T>`	`onErrorApplyUnchecked(ToLongFunction<? super T> fallback)`	Returns a function that applies this function to its input.
`default <E extends Throwable> ThrowingToLongFunction<T,E>`	`onErrorGetChecked(ThrowingLongSupplier<? extends E> fallback)`	Returns a function that applies this function to its input.
`default ToLongFunction<T>`	`onErrorGetUnchecked(LongSupplier fallback)`	Returns a function that applies this function to its input.
`default <E extends Throwable> ThrowingToLongFunction<T,E>`	`onErrorHandleChecked(ThrowingToLongFunction<? super X,? extends E> errorHandler)`	Returns a function that applies this function to its input.
`default ToLongFunction<T>`	`onErrorHandleUnchecked(ToLongFunction<? super X> errorHandler)`	Returns a function that applies this function to its input.
`default ToLongFunction<T>`	`onErrorReturn(long fallback)`	Returns a function that applies this function to its input.
`default <E extends Throwable> ThrowingToLongFunction<T,E>`	`onErrorThrowAsChecked(Function<? super X,? extends E> errorMapper)`	Returns a function that applies this function to its input.
`default <E extends RuntimeException> ToLongFunction<T>`	`onErrorThrowAsUnchecked(Function<? super X,? extends E> errorMapper)`	Returns a function that applies this function to its input.
`default ToLongFunction<T>`	`unchecked()`	Returns a function that applies this function to its input.
`static <T> ToLongFunction<T>`	`unchecked(ThrowingToLongFunction<? super T,?> function)`	Returns a function that applies the `function` function to its input.

- Method Detail
  - applyAsLong
```
long applyAsLong(T value)
          throws X extends Throwable
```
    Applies this function to the given argument.
    
    Parameters:
    
    value - The function argument.
    
    Returns:
    
    The function result.
    
    Throws:
    
    X - If an error occurs.
    
    X extends Throwable
  - onErrorThrowAsChecked
```
default <E extends Throwable> ThrowingToLongFunction<T,E> onErrorThrowAsChecked(Function<? super X,? extends E> errorMapper)
```
    Returns a function that applies this function to its input. Any checked exception thrown by this function is transformed using the given error mapper, and the returned function throws the transformation result.
    
    Type Parameters:
    
    E - The type of checked exception to transform to.
    
    Parameters:
    
    errorMapper - The function to use to transform any checked exception thrown by this function.
    
    Returns:
    
    A function that transforms any thrown checked exception.
    
    Throws:
    
    NullPointerException - If errorMapper is null.
  - onErrorThrowAsUnchecked
```
default <E extends RuntimeException> ToLongFunction<T> onErrorThrowAsUnchecked(Function<? super X,? extends E> errorMapper)
```
    Returns a function that applies this function to its input. Any checked exception thrown by this function is transformed using the given error mapper, and the returned function throws the transformation result.
    
    Type Parameters:
    
    E - The type of unchecked exception to transform to.
    
    Parameters:
    
    errorMapper - The function to use to transform any checked exception thrown by this function.
    
    Returns:
    
    A function that transforms any thrown checked exception.
    
    Throws:
    
    NullPointerException - If errorMapper is null.
  - onErrorHandleChecked
```
default <E extends Throwable> ThrowingToLongFunction<T,E> onErrorHandleChecked(ThrowingToLongFunction<? super X,? extends E> errorHandler)
```
    Returns a function that applies this function to its input. Any checked exception thrown by this function is transformed using the given error handler, and the returned function returns the transformation result.
    
    Type Parameters:
    
    E - The type of checked exception that can be thrown by the given error handler.
    
    Parameters:
    
    errorHandler - The function to use to transform any checked exception thrown by this function.
    
    Returns:
    
    A function that transforms any thrown checked exception.
    
    Throws:
    
    NullPointerException - If errorHandler is null.
  - onErrorHandleUnchecked
```
default ToLongFunction<T> onErrorHandleUnchecked(ToLongFunction<? super X> errorHandler)
```
    Returns a function that applies this function to its input. Any checked exception thrown by this function is transformed using the given error handler, and the returned function returns the transformation result.
    
    Parameters:
    
    errorHandler - The function to use to transform any checked exception thrown by this function.
    
    Returns:
    
    A function that transforms any thrown checked exception.
    
    Throws:
    
    NullPointerException - If errorHandler is null.
  - onErrorApplyChecked
```
default <E extends Throwable> ThrowingToLongFunction<T,E> onErrorApplyChecked(ThrowingToLongFunction<? super T,? extends E> fallback)
```
    Returns a function that applies this function to its input. If this function throws any checked exception, it is discarded and the given fallback function is invoked.
    
    Type Parameters:
    
    E - The type of checked exception that can be thrown by the given fallback function.
    
    Parameters:
    
    fallback - The function to invoke if this function throws any checked exception.
    
    Returns:
    
    A function that invokes the fallback function if this function throws any checked exception.
    
    Throws:
    
    NullPointerException - If fallback is null.
  - onErrorApplyUnchecked
```
default ToLongFunction<T> onErrorApplyUnchecked(ToLongFunction<? super T> fallback)
```
    Returns a function that applies this function to its input. If this function throws any checked exception, it is discarded and the given fallback function is invoked.
    
    Parameters:
    
    fallback - The function to invoke if this function throws any checked exception.
    
    Returns:
    
    A function that invokes the fallback function if this function throws any checked exception.
    
    Throws:
    
    NullPointerException - If fallback is null.
  - onErrorGetChecked
```
default <E extends Throwable> ThrowingToLongFunction<T,E> onErrorGetChecked(ThrowingLongSupplier<? extends E> fallback)
```
    Returns a function that applies this function to its input. If this function throws any checked exception, it is discarded and the given fallback supplier is invoked.
    
    Type Parameters:
    
    E - The type of checked exception that can be thrown by the given fallback supplier.
    
    Parameters:
    
    fallback - The supplier to produce the value to return if this function throws any checked exception.
    
    Returns:
    
    A function that invokes the fallback supplier if this function throws any checked exception.
    
    Throws:
    
    NullPointerException - If fallback is null.
  - onErrorGetUnchecked
```
default ToLongFunction<T> onErrorGetUnchecked(LongSupplier fallback)
```
    Returns a function that applies this function to its input. If this function throws any checked exception, it is discarded and the given fallback supplier is invoked.
    
    Parameters:
    
    fallback - The supplier to produce the value to return if this function throws any checked exception.
    
    Returns:
    
    A function that invokes the fallback supplier if this function throws any checked exception.
    
    Throws:
    
    NullPointerException - If fallback is null.
  - onErrorReturn
```
default ToLongFunction<T> onErrorReturn(long fallback)
```
    Returns a function that applies this function to its input. If this function throws any checked exception, it is discarded and the given fallback value is returned.
    
    Parameters:
    
    fallback - The value to return if this function throws any checked exception.
    
    Returns:
    
    A function that returns the fallback value if this function throws any checked exception.
  - unchecked
```
default ToLongFunction<T> unchecked()
```
    Returns a function that applies this function to its input. Any checked exception thrown by this function is wrapped in an UncheckedException without a stack trace.
    
    Returns:
    
    A function that wraps any checked exception in an UncheckedException.
  - of
```
static <T,X extends Throwable> ThrowingToLongFunction<T,X> of(ThrowingToLongFunction<T,X> function)
```
    Factory method for turning ThrowingToLongFunction-shaped lambdas into ThrowingToLongFunctions.
    
    Type Parameters:
    
    T - The type of the input to the function.
    
    X - The type of checked exception that can be thrown.
    
    Parameters:
    
    function - The lambda to return as ThrowingToLongFunction.
    
    Returns:
    
    The given lambda as a ThrowingToLongFunction.
    
    Throws:
    
    NullPointerException - If function is null.
  - unchecked
```
static <T> ToLongFunction<T> unchecked(ThrowingToLongFunction<? super T,?> function)
```
    Returns a function that applies the function function to its input. Any checked exception thrown by the function function is wrapped in an UncheckedException.
    
    Type Parameters:
    
    T - The type of the input to the function.
    
    Parameters:
    
    function - The function to apply when the returned function is applied.
    
    Returns:
    
    A function that wraps any checked exception in an UncheckedException.
    
    Throws:
    
    NullPointerException - If function is null.
  - checked
```
static <T,X extends Throwable> ThrowingToLongFunction<T,X> checked(ToLongFunction<? super T> function)
```
    Returns a function that applies the function function to its input. Any unchecked exception thrown by the function function is relayed to the caller. This method allows existing ToLongFunction instances to be used where ThrowingToLongFunction is expected.
    
    Type Parameters:
    
    T - The type of the input to the function.
    
    X - The type of checked exception that can be thrown.
    
    Parameters:
    
    function - The function to apply when the returned function is applied.
    
    Returns:
    
    A function that wraps any checked exception in an UncheckedException.
    
    Throws:
    
    NullPointerException - If function is null.
  - checked
```
static <T,X extends Throwable> ThrowingToLongFunction<T,X> checked(ToLongFunction<? super T> function,
                                                                               Class<X> errorType)
```
    Returns a function that applies the function function to its input. Any UncheckedException thrown by the function function is unwrapped if its cause is an instance of errorType, otherwise it is relayed to the caller.
    
    Type Parameters:
    
    T - The type of the input to the function.
    
    X - The type of checked exception that can be thrown.
    
    Parameters:
    
    function - The function to apply when the returned function is applied.
    
    errorType - The type of checked exception that can be thrown.
    
    Returns:
    
    A function that wraps any checked exception in an UncheckedException.
    
    Throws:
    
    NullPointerException - If function or errorType is null.

Interface ThrowingToLongFunction<T,​X extends Throwable>

Method Summary

Method Detail

applyAsLong

onErrorThrowAsChecked

onErrorThrowAsUnchecked

onErrorHandleChecked

onErrorHandleUnchecked

onErrorApplyChecked

onErrorApplyUnchecked

onErrorGetChecked

onErrorGetUnchecked

onErrorReturn

unchecked

of

unchecked

checked

checked

Interface ThrowingToLongFunction<T,X extends Throwable>