Package com.vaadin.signals.impl

Class Snapshot

java.lang.Object

com.vaadin.signals.impl.TreeRevision

com.vaadin.signals.impl.Snapshot

public class Snapshot
extends TreeRevision

An immutable tree revision.

Constructor Summary

Constructors

Constructor	Description
Snapshot(Id ownerId, boolean includeMax)	Creates an empty snapshot.
Snapshot(MutableTreeRevision base)	Creates a new snapshot from a mutable tree revision.

Method Summary

Methods inherited from class com.vaadin.signals.impl.TreeRevision

assertValidTree, data, nodes, originalInserts, ownerId

Methods inherited from class java.lang.Object

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

Constructor Details

Snapshot

public Snapshot(MutableTreeRevision base)

Creates a new snapshot from a mutable tree revision.

Parameters:

base - the mutable base revision to copy, not null

Snapshot

public Snapshot(Id ownerId,
 boolean includeMax)

Creates an empty snapshot. The snapshot contains an empty root node with Id.ZERO that is used for tracking signal values and optionally also another empty root node with Id.MAX that is used for tracking metadata.

Parameters:

ownerId - the id of the tree owner, not null

includeMax - flag indicating whether an additional root node should be created for tracking metadata