gumbo.util.relation
Class TreeNodes.TreeNodeWrapper

java.lang.Object
  |
  +--gumbo.util.Delegatables.DelegatableWrapper
        |
        +--gumbo.util.relation.Relations.RelationWrapper
              |
              +--gumbo.util.relation.TreeNodes.TreeNodeWrapper

All Implemented Interfaces:

Delegatable, Disposable, Relation, java.io.Serializable, TreeNode

Enclosing class:

TreeNodes

public static class TreeNodes.TreeNodeWrapper

extends Relations.RelationWrapper

implements TreeNode, java.io.Serializable

A serializable wrapper for a target TreeNode. All accessors, including identity, forward to the target.

See Also:

Serialized Form

Constructor Summary

TreeNodes.TreeNodeWrapper(TreeNode target)

Method Summary

void	addChild(int index, TreeNode child) Adds a child to this parent.
void	addChild(TreeNode child) Adds a child to this parent.
TreeNode	findTreeNode(java.lang.Object delegator) Convenience method for getting the tree node corresponding to a delegator in this tree node's relationship.
Group	getChildren() Gets an immutable view of this parent's children.
java.lang.Object	getParent() Gets the parent of this child relation.
boolean	hasChildren() Returns true if this parent has any children, false if none.
void	implSetParent(TreeNode parent) Used by the system to mutually set the parent of this child.
void	removeChild(TreeNode child) Removes a child from this parent, and makes the child an orphan.

Methods inherited from class gumbo.util.relation.Relations.RelationWrapper

canFindRelation, dispose, findRelation, getAddedConnectionOut, getRelationship, getRemovingConnectionOut, implReadConnections, implWriteConnections, isDisposed, setRelationship

Methods inherited from class gumbo.util.Delegatables.DelegatableWrapper

getDelegator, initDelegator, isDelegatorInited

Methods inherited from class java.lang.Object

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

Methods inherited from interface gumbo.util.relation.Relation

canFindRelation, findRelation, getAddedConnectionOut, getRelationship, getRemovingConnectionOut, implReadConnections, implWriteConnections, setRelationship

Methods inherited from interface gumbo.util.Disposable

dispose, isDisposed

Methods inherited from interface gumbo.util.Delegatable

getDelegator, initDelegator, isDelegatorInited

Constructor Detail

TreeNodes.TreeNodeWrapper

public TreeNodes.TreeNodeWrapper(TreeNode target)

Parameters:

target - Target tree node. Never null.

Method Detail

getParent

public java.lang.Object getParent()

Description copied from interface: TreeNode

Gets the parent of this child relation.

Specified by:

getParent in interface TreeNode

Returns:

Parent delegator. Null if none (an orphan child).

addChild

public void addChild(TreeNode child)

Description copied from interface: TreeNode

Adds a child to this parent. The child must be an orphan (no parent). If the children store is a list the child is added to the end. Unless otherwise noted, the parent and child must be in the same relationship, the connect change is type TreeNodeConnection.

Specified by:

addChild in interface TreeNode

Parameters:

child - Child relation. Never null. Unless otherwise noted, duplicates are the same as a new child. Note that a SetList children store will throw an exception for duplicates.

addChild

public void addChild(int index,
                     TreeNode child)

Description copied from interface: TreeNode

Adds a child to this parent. The child must be an orphan (no parent). The child is inserted at a given position in the child list, with children at and after this position being shifted towards the end. Unless otherwise noted, the parent and child must be in the same relationship.

Specified by:

addChild in interface TreeNode

Parameters:

index - List index (>=0, <=size). If <0, same as addChild(Object) regardless of children store type.

child - Child relation. Never null. Unless otherwise noted, duplicates are ignored. Note that a SetList children store will throw an exception for duplicates.

removeChild

public void removeChild(TreeNode child)

Description copied from interface: TreeNode

Removes a child from this parent, and makes the child an orphan. Unless otherwise noted, the parent and child will remain in the same relationship.

Specified by:

removeChild in interface TreeNode

Parameters:

child - Child relation. Never null. Unless otherwise noted, a missing child is ignored.

hasChildren

public boolean hasChildren()

Description copied from interface: TreeNode

Returns true if this parent has any children, false if none.

Specified by:

hasChildren in interface TreeNode

Returns:

The result.

getChildren

public Group getChildren()

Description copied from interface: TreeNode

Gets an immutable view of this parent's children. When possible, use hasChildren() instead of this view to minimize lazy builds.

Specified by:

getChildren in interface TreeNode

Returns:

The non-null child delegators (Object). Never null. Unless otherwise noted, this is a singleton immutable view.

findTreeNode

public TreeNode findTreeNode(java.lang.Object delegator)

Description copied from interface: TreeNode

Convenience method for getting the tree node corresponding to a delegator in this tree node's relationship.

Specified by:

findTreeNode in interface TreeNode

Parameters:

delegator - The delegator. Never null.

Returns:

The delegator's tree node. Never null.

implSetParent

public void implSetParent(TreeNode parent)

Description copied from interface: TreeNode

Used by the system to mutually set the parent of this child. By convention, performs checking but affects no other state.

Specified by:

implSetParent in interface TreeNode

Parameters:

parent - Parent relation. Null if none (orphan).