io.dwak.reactor

Class ReactorDependency

java.lang.Object

io.dwak.reactor.ReactorDependency

public class ReactorDependency
extends java.lang.Object

A Dependency represents an atomic unit of reactive data that a computation might depend on. When the data changes, the computations are invalidated.

Constructor Summary

Constructors

Constructor and Description
ReactorDependency()

Method Summary

Modifier and Type	Method and Description
void	changed() Invalidate all dependent computations immediately and remove them as dependents.
boolean	depend()
boolean	depend(ReactorComputation reactorComputation) Declares that the current computation (or ReactorComputation if given) depends on `dependency`.
boolean	hasDependants() True if this Dependency has one or more dependent ReactorComputation, which would be invalidated if this ReactorDependency were to change.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReactorDependency

public ReactorDependency()

Method Detail

depend

public boolean depend()

depend

public boolean depend(ReactorComputation reactorComputation)

Declares that the current computation (or ReactorComputation if given) depends on `dependency`. The computation will be invalidated the next time `dependency` changes. If there is no current computation and depend()} is called with no arguments, it does nothing and returns false.

Parameters:

reactorComputation - computation that depends on this dependency

Returns:

true if computation is a new dependant rather than an existing one

changed

public void changed()

Invalidate all dependent computations immediately and remove them as dependents.

hasDependants

public boolean hasDependants()

True if this Dependency has one or more dependent ReactorComputation, which would be invalidated if this ReactorDependency were to change.

Returns:

true if the dependency has dependants