Package io.permazen.core

Interface SimpleFieldChangeListener

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 SimpleFieldChangeListener

Listener interface for notifications of a change in value of a SimpleField.

See Also:

• Transaction.addSimpleFieldChangeListener()

Method Summary

Modifier and Type	Method	Description
<V> void	onSimpleFieldChange(Transaction tx, ObjId id, SimpleField<V> field, int[] path, NavigableSet<ObjId> referrers, V oldValue, V newValue)	Receive notification of a change in the value of a SimpleField in an object.

Method Details

onSimpleFieldChange

<V> void onSimpleFieldChange(Transaction tx,
 ObjId id,
 SimpleField<V> field,
 int[] path,
 NavigableSet<ObjId> referrers,
 V oldValue,
 V newValue)

Receive notification of a change in the value of a SimpleField in an object.

Notifications are only delivered when the set of referring objects is non-empty.

Notifications are delivered in the same thread that made the change, before the outermost mutation operation returns.

Type Parameters:

V - Java type for field's values

Parameters:

tx - associated transaction

id - the ID of the affected object (i.e., the object containing the field that changed)

field - the field that changed

path - path of reference fields (represented by storage IDs) that lead to id

referrers - all objects that (indirectly) refer to the affected object via the path

oldValue - the field's previous value

newValue - the field's new value