Package org.zkoss.pivot.util

Class Trees

java.lang.Object

org.zkoss.pivot.util.Trees

public class Trees
extends Object

Utility class for PivotHeaderTree

Author:

simonpai

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Trees.NodeRunner
static class	Trees.TreeTravCtx

Constructor Summary

Constructors

Constructor	Description
Trees()

Method Summary

Modifier and Type	Method	Description
static Calculator	getCalculator(PivotField field, int index)	Retrieves the Calculator from a field by index.
static Calculator	getCalculator(PivotHeaderNode node, int index)	Retrieves the Calculator from a node by index.
static Object	getKey(PivotField field, Object value)	Returns the key defined by GroupHandler on the field, if any.
static PivotHeaderNode	getNode(PivotHeaderTree tree, int[] indicies)	Seek down PivotHeaderNode by indices.
static PivotHeaderNode	getNode(PivotHeaderTree tree, Object[] keys)	Seek down PivotHeaderNode based on keys.
static int	getSize(PivotHeaderTree tree)	Compute the size of tree.
static int	getSize(PivotHeaderTree tree, boolean open)	Compute the size of tree.
static int	getSubtotalCount(PivotField field)	Return the count of subtotal Calculators on a field
static int	getSubtotalCount(PivotHeaderNode node)	Return the count of subtotal Calculators on a node
static int	getSubtotalCount(PivotHeaderNode node, boolean open)	Return the count of subtotal Calculators on a node
static boolean	isRoot(PivotHeaderNode node)	Return true if node is root.
static boolean	isTerminal(PivotHeaderNode node)	Return true if node is leaf or closed.
static void	openDown(PivotHeaderNode node, boolean open)	Recursively set open or close to a node and all its descendants.
static void	traverse(PivotHeaderTree tree, boolean asIfOpenAll, int offset, int limit, Trees.NodeRunner runner)	Traverse the tree in a depth first, children first fashion, while concern paging.
static void	traverse(PivotHeaderTree tree, boolean open, Trees.NodeRunner runner)	Traverse the tree in a depth first, children first fashion.
static void	traverse(PivotHeaderTree tree, Trees.NodeRunner runner)	Traverse the tree in a depth first, children first fashion.

Methods inherited from class java.lang.Object

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

Constructor Detail

Trees

public Trees()

Method Detail

getSubtotalCount

public static int getSubtotalCount(PivotHeaderNode node)

Return the count of subtotal Calculators on a node

getSubtotalCount

public static int getSubtotalCount(PivotHeaderNode node,
                                   boolean open)

Return the count of subtotal Calculators on a node

Parameters:

open - compute as if the node were always open.

getSubtotalCount

public static int getSubtotalCount(PivotField field)

Return the count of subtotal Calculators on a field

getCalculator

public static Calculator getCalculator(PivotHeaderNode node,
                                       int index)

Retrieves the Calculator from a node by index.

getCalculator

public static Calculator getCalculator(PivotField field,
                                       int index)

Retrieves the Calculator from a field by index.

getKey

public static Object getKey(PivotField field,
                            Object value)

Returns the key defined by GroupHandler on the field, if any.

getSize

public static int getSize(PivotHeaderTree tree)

Compute the size of tree. Subtotal Calculator numbers are taken into account. A full traversal of the tree will be performed upon calling this method.

getSize

public static int getSize(PivotHeaderTree tree,
                          boolean open)

Compute the size of tree. Subtotal Calculator numbers are taken into account. A full traversal of the tree will be performed upon calling this method.

Parameters:

open - compute as if all nodes were open

isTerminal

public static boolean isTerminal(PivotHeaderNode node)

Return true if node is leaf or closed.

isRoot

public static boolean isRoot(PivotHeaderNode node)

Return true if node is root.

getNode

public static PivotHeaderNode getNode(PivotHeaderTree tree,
                                      Object[] keys)

Seek down PivotHeaderNode based on keys.

Returns:

null if not found

getNode

public static PivotHeaderNode getNode(PivotHeaderTree tree,
                                      int[] indicies)

Seek down PivotHeaderNode by indices.

Returns:

null if not found

openDown

public static void openDown(PivotHeaderNode node,
                            boolean open)

Recursively set open or close to a node and all its descendants.

traverse

public static void traverse(PivotHeaderTree tree,
                            Trees.NodeRunner runner)

Traverse the tree in a depth first, children first fashion.

traverse

public static void traverse(PivotHeaderTree tree,
                            boolean open,
                            Trees.NodeRunner runner)

Traverse the tree in a depth first, children first fashion.

Parameters:

open - traverse as if all nodes were open.

traverse

public static void traverse(PivotHeaderTree tree,
                            boolean asIfOpenAll,
                            int offset,
                            int limit,
                            Trees.NodeRunner runner)

Traverse the tree in a depth first, children first fashion, while concern paging. runner will not be invoked on nodes that are completely out of range.

Parameters:

asIfOpenAll - traverse as if all nodes were open.

offset -

limit - no limit if negative