spatial
Class RegionQuery

java.lang.Object
  |
  +--index.Query
        |
        +--spatial.RegionQuery

All Implemented Interfaces:

SpatialSearchTreeQuery

public class RegionQuery

extends Query

implements SpatialSearchTreeQuery

A general region query for search trees

Field Summary

protected int[]	index The current path: search indices for the different heights of the tree.
protected static int	MAXHEIGHT The maximum height of the tree.
protected SpatialSearchTreeNode[]	node The current path: nodes from different heights of the tree.
protected int	operation The query mode.
protected int	pathLength The length of the current path.
protected SpatialQuery	query The current query.
protected SpatialSearchTreeObject	queryObj The current query object, may be null.
protected MBR	rect The current query rectangle.

Fields inherited from class index.Query

ALLLAYERS, ALLSCALES, QUERY, queryNum, REMOVEALL, REMOVEEXACT, resultNum, timer, UPDATEALL, UPDATEEXACT

Constructor Summary

RegionQuery(SpatialQuery query)
Region query constructor.

Method Summary

SpatialSearchTreeObject	getNextObject() Returns the next object fulfilling the query condition.
protected SpatialSearchTreeObject	getNextObject(int actHeight) Returns (or removes or moves) the next object(s) fulfilling the query condition.
SpatialQuery	getQuery() Return the spatial query.
void	init(SpatialSearchTree tree) Initializes a query without spatial conditions.
void	init(SpatialSearchTree tree, int operation) Initializes a query without spatial conditions.
void	initWithObject(SpatialSearchTree tree, SpatialSearchTreeObject queryObj) Initializes a new query.
void	initWithObject(SpatialSearchTree tree, SpatialSearchTreeObject queryObj, int operation) Initializes a new query.
void	initWithPoint(SpatialSearchTree tree, int[] point) Initializes a new query.
void	initWithPoint(SpatialSearchTree tree, int[] point, int operation) Initializes a new query.
void	initWithRect(SpatialSearchTree tree, MBR window) Initializes a new query.
void	initWithRect(SpatialSearchTree tree, MBR window, int operation) Initializes a new query.
void	reset() Resets the query.
void	resetLocks() Resets all locks except of the root node.

Methods inherited from class index.Query

getQueryNum, getQueryTime, getResultNum, resetCounters, setCounters

Methods inherited from class java.lang.Object

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

Methods inherited from interface spatial.SpatialSearchTreeQuery

getQueryNum, getQueryTime, getResultNum, resetCounters

Field Detail

query

protected SpatialQuery query

The current query.

queryObj

protected SpatialSearchTreeObject queryObj

The current query object, may be null.

rect

protected MBR rect

The current query rectangle.

operation

protected int operation

The query mode.

MAXHEIGHT

protected static final int MAXHEIGHT

The maximum height of the tree.

See Also:

Constant Field Values

node

protected SpatialSearchTreeNode[] node

The current path: nodes from different heights of the tree.

index

protected int[] index

The current path: search indices for the different heights of the tree.

pathLength

protected int pathLength

The length of the current path.

Constructor Detail

RegionQuery

public RegionQuery(SpatialQuery query)

Region query constructor.

Parameters:

query - definition of the query

Method Detail

getNextObject

public SpatialSearchTreeObject getNextObject()

Returns the next object fulfilling the query condition. Will return null if no object is found.

Specified by:

getNextObject in interface SpatialSearchTreeQuery

Returns:

the found object

getNextObject

protected SpatialSearchTreeObject getNextObject(int actHeight)

Returns (or removes or moves) the next object(s) fulfilling the query condition. Will return null if no object is found.

Parameters:

actHeight - actual height

Returns:

the found object

getQuery

public SpatialQuery getQuery()

Return the spatial query.

Returns:

the spatial query

init

public void init(SpatialSearchTree tree)

Initializes a query without spatial conditions.

Specified by:

init in interface SpatialSearchTreeQuery

Parameters:

tree - the searchtree

init

public void init(SpatialSearchTree tree,
                 int operation)

Initializes a query without spatial conditions.

Parameters:

tree - the searchtree

operation - the operation

initWithPoint

public void initWithPoint(SpatialSearchTree tree,
                          int[] point)

Initializes a new query.

Parameters:

tree - the searchtree

point - coordinates of the query point

initWithPoint

public void initWithPoint(SpatialSearchTree tree,
                          int[] point,
                          int operation)

Initializes a new query.

Parameters:

tree - the searchtree

point - coordinates of the query point

operation - the query operation

initWithRect

public void initWithRect(SpatialSearchTree tree,
                         MBR window)

Initializes a new query.

Parameters:

tree - the searchtree

window - the query window

initWithRect

public void initWithRect(SpatialSearchTree tree,
                         MBR window,
                         int operation)

Initializes a new query.

Parameters:

tree - the searchtree

window - the query window

operation - the query operation

initWithObject

public void initWithObject(SpatialSearchTree tree,
                           SpatialSearchTreeObject queryObj)

Initializes a new query.

Parameters:

tree - the searchtree

queryObj - the query object

initWithObject

public void initWithObject(SpatialSearchTree tree,
                           SpatialSearchTreeObject queryObj,
                           int operation)

Initializes a new query.

Parameters:

tree - the searchtree

queryObj - the query object

operation - the query operation

reset

public void reset()

Resets the query.

Specified by:

reset in interface SpatialSearchTreeQuery

resetLocks

public void resetLocks()

Resets all locks except of the root node.