Summary
On adding a node to a tree, if it already exists, and if
Tree#duplicates() returns false, #onAttemptToAddDuplicate()
will be called and the existing node will be stored in
this._preceding.
- Assembly
- Db4objects
.Db4o-2010 .dll - Namespace
- Db4objects
.Db4o .Foundation - Containing Type
- Tree
Syntax
public virtual Tree AddedOrExisting()Remarks
On adding a node to a tree, if it already exists, and if
Tree#duplicates() returns false, #onAttemptToAddDuplicate()
will be called and the existing node will be stored in
this._preceding.
This node node can then be asked for the node that prevails
in the tree on adding, using the #addedOrExisting() method.
This mechanism allows doing find() and add() in one run.
Return Value
| Type | Description |
|---|---|
| Tree |