gumbo.graphic.space
Interface GraphicSpaceRoot

All Superinterfaces:

Delegatable, Graphic, SpaceNode

All Known Implementing Classes:

AbstractGraphicSpaceRoot

public interface GraphicSpaceRoot

extends SpaceNode, Delegatable

A space node used by graphic spaces as the root of a space tree. By implementing Delegatable, the client can navigate through the tree to its root and up to its graphic space delegator. By disallowing use of a transform node as the root the absolute reference space is assured to be reachable. TODO: Is this class needed, especially Delegatable?

Version:

$Revision: 1.2 $

Author:

Jon Barrilleaux (jonb@jmbaai.com) of JMB and Associates Inc.

Method Summary

java.lang.Object	getDelegator() Gets the delegator of this delegate, as set by initDelegator().
TreeNode	getGraphicSpaceTree() Gets the delegate tree node for this delegator's spatial geometry tree.
Delegatable	initDelegator(java.lang.Object delegator) Used by delegators and serialization to initialize this delegate's delegator reference.

Methods inherited from interface gumbo.graphic.Graphic

getGraphic

Methods inherited from interface gumbo.util.Delegatable

isDelegatorInited

Method Detail

getGraphicSpaceTree

public TreeNode getGraphicSpaceTree()

Description copied from interface: SpaceNode

Gets the delegate tree node for this delegator's spatial geometry tree.

Specified by:

getGraphicSpaceTree in interface SpaceNode

Returns:

Reference to the delegate. Never null.

Throws:

java.lang.IllegalStateException - The tree node parent is not null.

initDelegator

public Delegatable initDelegator(java.lang.Object delegator)

Description copied from interface: Delegatable

Used by delegators and serialization to initialize this delegate's delegator reference. Re-initialization with the same value is allowed. Throws an exception if initialization fails for any reason.

Specified by:

initDelegator in interface Delegatable

Parameters:

delegator - Reference to the delegator. If self-delegation is allowed and the delegator is null, this object is the delegator (which facilitates inline construction).

Returns:

Reference to this delegatable (which facilitates inline construction).

Throws:

java.lang.IllegalArgumentException - Delegator is null.

getDelegator

public java.lang.Object getDelegator()

Description copied from interface: Delegatable

Gets the delegator of this delegate, as set by initDelegator(). Throws an exception if isDelegatorInited() is false.

Specified by:

getDelegator in interface Delegatable

Returns:

The graphic space delegator (GraphicSpace). Never null.