Package org.apache.lucene.spatial3d.geom

Interface GeoArea

All Superinterfaces:

Membership

All Known Subinterfaces:

GeoAreaShape, GeoBBox, GeoCircle, GeoDistanceShape, GeoPath, GeoPointShape, GeoPolygon, XYZSolid

All Known Implementing Classes:

GeoBaseDistanceShape, GeoCompositeAreaShape, GeoCompositePolygon, GeoDegenerateVerticalLine

public interface GeoArea
extends Membership

A GeoArea represents a standard 2-D breakdown of a part of sphere. It can be bounded in latitude, or bounded in both latitude and longitude, or not bounded at all. The purpose of the interface is to describe bounding shapes used for computation of geo hashes.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary

Fields

Modifier and Type	Field	Description
static int	CONTAINS	The referenced shape CONTAINS this area
static int	DISJOINT	The referenced shape has no relation to this area
static int	OVERLAPS	The referenced shape OVERLAPS this area
static int	WITHIN	The referenced shape IS WITHIN this area

Method Summary

Modifier and Type	Method	Description
int	getRelationship(GeoShape shape)	Find the spatial relationship between a shape and the current geo area.

Methods inherited from interface org.apache.lucene.spatial3d.geom.Membership

isWithin, isWithin

Field Detail

CONTAINS

static final int CONTAINS

The referenced shape CONTAINS this area

See Also:

Constant Field Values

WITHIN

static final int WITHIN

The referenced shape IS WITHIN this area

See Also:

Constant Field Values

OVERLAPS

static final int OVERLAPS

The referenced shape OVERLAPS this area

See Also:

Constant Field Values

DISJOINT

static final int DISJOINT

The referenced shape has no relation to this area

See Also:

Constant Field Values

Method Detail

getRelationship

int getRelationship(GeoShape shape)

Find the spatial relationship between a shape and the current geo area. Note: return value is how the GeoShape relates to the GeoArea, not the other way around. For example, if this GeoArea is entirely within the shape, then CONTAINS should be returned. If the shape is entirely enclosed by this GeoArea, then WITHIN should be returned.

It is permissible to return OVERLAPS instead of WITHIN if the shape intersects with the area at even a single point. So, a circle inscribed in a rectangle could return either OVERLAPS or WITHIN, depending on implementation. It is not permissible to return CONTAINS or DISJOINT in this circumstance, however.

Similarly, it is permissible to return OVERLAPS instead of CONTAINS under conditions where the shape consists of multiple independent overlapping subshapes, and the area overlaps one of the subshapes. It is not permissible to return WITHIN or DISJOINT in this circumstance, however.

Parameters:

shape - is the shape to consider.

Returns:

the relationship, from the perspective of the shape.