com.sri.emo.dbobj.selectiontree
Class TreeSelectionFactory

java.lang.Object
  com.sri.emo.dbobj.selectiontree.TreeSelectionFactory

public class TreeSelectionFactory
extends Object

Selects a tree of associated nodes. Each node from the root is included in the tree if it has a strong relationship with its parent.

each parent has an attribute MyChildren set with an Node[] array of children, and each child has an attribute set for its parent, a Node.

Example Code

 Node n = new Node();
 //Set values
 

 TreeSelectionFactory selectionFactory = new TreeSelectionFactory(n);
 Map allNodesElegibleForDeletion = selectionFactory.getNodesInTree();
 

 

Author:

Michael Rimov, Larry Hamel

To Do:

Rewrite the model as a series of decorative interfaces that have an in-memory tree design -- use that tree design to assign indentation levels.

Field Summary

static String

IS_PARENT_OF

Constructor Summary

TreeSelectionFactory(Node root)
Construct a TreeSelectionFactory given the root ndoe.

Method Summary

Map	getNodesInStronglyRelatedTree() Get ALL related nodes in tree beneath this node EXCEPT types indicated for omission recurses into tree; side-effect: adds attribute 'level' with node level w/i tree to each node.
static void	getNodesInStronglyRelatedTreeRecursive(Node currentNode, Map outputMap) Handles the recursive traversal through related nodes in a tree.
Map	getNodesInTree() Get ALL related nodes in tree beneath this node.

Methods inherited from class java.lang.Object

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

Field Detail

IS_PARENT_OF

public static final String IS_PARENT_OF

See Also:

Constant Field Values

Constructor Detail

TreeSelectionFactory

public TreeSelectionFactory(Node root)

Construct a TreeSelectionFactory given the root ndoe.

Parameters:

root - Node

Method Detail

getNodesInTree

public Map getNodesInTree()
                   throws DBException

Get ALL related nodes in tree beneath this node.

side-effect: adds attribute 'level' with node level w/i tree to each node. side-effect: adds attribute 'MyParentIs' with parent node side-effect: adds attribute 'MyChildren' with array of Nodes of all children

uses optional INDENT attribute to determine formatting indentation

Returns:

Map keyed by node id, pointing to the nodes in the tree.

Throws:

DBException

To Do:

get rid of side affect.

getNodesInStronglyRelatedTree

public Map getNodesInStronglyRelatedTree()
                                  throws DBException

Get ALL related nodes in tree beneath this node EXCEPT types indicated for omission recurses into tree; side-effect: adds attribute 'level' with node level w/i tree to each node.

uses optional INDENT attribute to determine formatting indentation

Throws:

DBException - upon database access error.

getNodesInStronglyRelatedTreeRecursive

public static void getNodesInStronglyRelatedTreeRecursive(Node currentNode,
                                                          Map outputMap)
                                                   throws DBException

Handles the recursive traversal through related nodes in a tree. Adds side-effect of an attribute on each node that is array of all immediate children. (null if none)

Parameters:

outputMap - Map

Throws:

DBException