sirius.kernel.commons

Interface ValueSupplier<K>

Type Parameters:

K - the type of key used as input for the value supplier.

public interface ValueSupplier<K>

Provides a value for the given key just like a Function.

However, the return value is wrapped as Value. This permits to distinguish between a null and no value. Also by declaring Exception in the throws clause, we delegate the exception handling from the callee to the caller.

Method Summary

Modifier and Type	Method and Description
Value	apply(K key) Computes or fetches the value for the given key.

Method Detail

apply

Value apply(K key)
     throws Exception

Computes or fetches the value for the given key.

Parameters:

key - the key to fetch the value for

Returns:

the value for the given key or null to indicate that no value is available.

Throws:

Exception - in case of an error while fetching the value.