org.locationtech.geowave.core.geotime.store.query.filter

Class SpatialQueryFilter.GeometryImage

java.lang.Object

org.locationtech.geowave.core.geotime.store.query.filter.SpatialQueryFilter.GeometryImage

Enclosing class:

SpatialQueryFilter

public static class SpatialQueryFilter.GeometryImage
extends Object

This class is used for interning a PreparedGeometry. Prepared geometries cannot be interned since they do not extend Object.hashCode().

Interning a geometry assumes a geometry is already constructed on the heap at the time interning begins. The byte image of geometry provides a more efficient component to hash and associate with a single image of the geometry.

The approach of interning the Geometry prior to construction of a PreparedGeometry lead to excessive memory use. Thus, this class is constructed to hold the prepared geometry and prevent reconstruction of the underlying geometry from a byte array if the Geometry has been interned.

Using this approach increased performance of a large query unit test by 40% and reduced heap memory consumption by roughly 50%.

Field Summary

Fields

Modifier and Type	Field and Description
byte[]	geometryBinary
org.locationtech.jts.geom.prep.PreparedGeometry	preparedGeometry

Constructor Summary

Constructors

Constructor and Description
GeometryImage(byte[] geometryBinary)
GeometryImage(org.locationtech.jts.geom.prep.PreparedGeometry preparedGeometry)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
org.locationtech.jts.geom.prep.PreparedGeometry	getGeometry()
int	hashCode()
void	init()

Methods inherited from class java.lang.Object

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

Field Detail

geometryBinary

public byte[] geometryBinary

preparedGeometry

public org.locationtech.jts.geom.prep.PreparedGeometry preparedGeometry

Constructor Detail

GeometryImage

public GeometryImage(org.locationtech.jts.geom.prep.PreparedGeometry preparedGeometry)

GeometryImage

public GeometryImage(byte[] geometryBinary)

Method Detail

init

public void init()

getGeometry

public org.locationtech.jts.geom.prep.PreparedGeometry getGeometry()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object