Package com.vaadin.flow.signals.function

Interface SignalComputation<T>

Type Parameters:
T - the computed value type
All Superinterfaces:
Serializable
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 SignalComputation<T> extends Serializable
Computes a signal value based on other signals. The computation is automatically re-run when any dependent signal changes.

Dependencies are automatically tracked - any signal whose value is accessed during the computation becomes a dependency. The computation is lazy and only runs when the signal value is accessed and the previous value might have been invalidated by dependent signal changes.

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    T
    compute()
    Computes the signal value, automatically tracking dependencies on other signals.

  • Method Details

    • compute

      T compute()
      Computes the signal value, automatically tracking dependencies on other signals.
      Returns:
      the computed value, may be null