Package me.datafox.dfxengine.dependencies

Interface Dependent

All Known Subinterfaces:

Modifier, Value

All Known Implementing Classes:

AbstractModifier, DependencyDependent, MappingOperationModifier, MappingOperationModifier.SpecialValue, OperationModifier, StaticValue, ValueImpl

public interface Dependent

A simple dependent that can be invalidated. Invalidation should generally be only called by Dependency.invalidateDependents(). If a class that implements this interface also implements Dependency, invalidate() must call Dependency.invalidateDependents() on itself.

In general a dependent is implemented on any class that has a return value which is dependent on values of other classes. These other classes should implement Dependency, and the dependent should be added to them with Dependency.addDependent(Dependent). The dependent can then cache the return value, and invalidate that cache whenever invalidate() is called, and the Dependencies should call it whenever something in them changes, usually by calling Dependency.invalidateDependents().

Method Summary

Modifier and Type	Method	Description
void	invalidate()	Invalidates the class implementing this interface.

Method Details

invalidate

void invalidate()

Invalidates the class implementing this interface. In practice, this should invalidate the caches of any values that are dependent on values of other classes. Because this method may be called multiple times, it is not recommended to recalculate the cached value in this method, and instead create an invalidated flag that is set in this method, and recalculate the value in its getter method if the flag is set.