spatial
Class BasicSpatialQuery

java.lang.Object
  |
  +--spatial.BasicSpatialQuery

All Implemented Interfaces:

SpatialQuery

Direct Known Subclasses:

AllQuery, ExactMatchQuery, IsContainedQuery, SelectQuery, WindowQuery

public abstract class BasicSpatialQuery

extends java.lang.Object

implements SpatialQuery

Class offering some basic operations required for spatial queries performed by a spatial search tree.

Field Summary

protected int

tolerance tolerance, required by some queries

Constructor Summary

BasicSpatialQuery()

Method Summary

boolean	areEqual(SpatialSearchTreeObject queryObj, SpatialSearchTreeObject storedObj) Tests whether the query object and the stored object are equal.
boolean	conditionFulfilled(MBR rect, MBR entryMBR) Tests whether the query rectangle and the MBR of a non-leaf entry intersect.
boolean	conditionFulfilled(MBR rect, SpatialSearchTreeEntry entry) Tests whether the query rectangle and the MBR of an leaf entry intersect.
boolean	conditionFulfilled(MBR rect, SpatialSearchTreeObject obj) Tests whether the query rectangle and the MBR of an object intersect.
void	setTolerance(int tolerance) Sets the tolerance attribute.

Methods inherited from class java.lang.Object

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

Field Detail

tolerance

protected int tolerance

tolerance, required by some queries

Constructor Detail

BasicSpatialQuery

public BasicSpatialQuery()

Method Detail

areEqual

public boolean areEqual(SpatialSearchTreeObject queryObj,
                        SpatialSearchTreeObject storedObj)

Tests whether the query object and the stored object are equal.

Specified by:

areEqual in interface SpatialQuery

Parameters:

queryObj - the query object

storedObj - the stored object

Returns:

true if equal

conditionFulfilled

public boolean conditionFulfilled(MBR rect,
                                  MBR entryMBR)

Tests whether the query rectangle and the MBR of a non-leaf entry intersect. The tolerance attribute is considered.

Specified by:

conditionFulfilled in interface SpatialQuery

Parameters:

rect - the query rectangle

entryMBR - the minimum bounding rectangle of non-leaf entry

Returns:

true if the condition is fulfilled

conditionFulfilled

public boolean conditionFulfilled(MBR rect,
                                  SpatialSearchTreeEntry entry)

Tests whether the query rectangle and the MBR of an leaf entry intersect. The tolerance attribute is considered.

Specified by:

conditionFulfilled in interface SpatialQuery

Parameters:

rect - the query rectangle

entry - the entry of a leaf entry

Returns:

true if the condition is fulfilled

conditionFulfilled

public boolean conditionFulfilled(MBR rect,
                                  SpatialSearchTreeObject obj)

Tests whether the query rectangle and the MBR of an object intersect. The tolerance attribute is considered.

Specified by:

conditionFulfilled in interface SpatialQuery

Parameters:

rect - the query rectangle

obj - the object

Returns:

true if the condition fulfilled

setTolerance

public void setTolerance(int tolerance)

Sets the tolerance attribute.

Parameters:

tolerance - the new value of tolerance