com.spatial4j.core

Class SpatialPredicate

java.lang.Object

com.spatial4j.core.SpatialPredicate

All Implemented Interfaces:

Serializable

public abstract class SpatialPredicate
extends Object
implements Serializable

A predicate that compares a stored geometry to a supplied geometry. It's enum-like. For more explanation of each predicate, consider looking at the source implementation of evaluate(com.spatial4j.core.shape.Shape, com.spatial4j.core.shape.Shape). It's important to be aware that Lucene-spatial makes no distinction of shape boundaries, unlike many standardized definitions. Nor does it make dimensional distinctions (e.g. line vs polygon). You can lookup a predicate by "Covers" or "Contains", for example, and you will get the same underlying predicate implementation.

See Also:

DE-9IM at Wikipedia, based on OGC specs, ESRIs docs on spatial relations, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static SpatialPredicate	BBoxIntersects Bounding box of the *indexed* shape, then Intersects.
static SpatialPredicate	BBoxWithin Bounding box of the *indexed* shape, then IsWithin.
static SpatialPredicate	Contains Meets the "Covers" OGC definition (boundary-neutral).
static SpatialPredicate	Intersects Meets the "Intersects" OGC definition.
static SpatialPredicate	IsDisjointTo Meets the "Disjoint" OGC definition.
static SpatialPredicate	IsEqualTo Meets the "Equals" OGC definition.
static SpatialPredicate	IsWithin Meets the "CoveredBy" OGC definition (boundary-neutral).
static SpatialPredicate	Overlaps Almost meets the "Overlaps" OGC definition, but boundary-neutral (boundary==interior).

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SpatialPredicate(String name)

Method Summary

Modifier and Type	Method and Description
abstract boolean	evaluate(Shape indexedShape, Shape queryShape) Returns whether the relationship between indexedShape and queryShape is satisfied by this operation.
static SpatialPredicate	get(String v)
String	getName()
static boolean	is(SpatialPredicate op, SpatialPredicate... tst)
protected void	register(String name)
String	toString()
static List<SpatialPredicate>	values()

Methods inherited from class java.lang.Object

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

Field Detail

BBoxIntersects

public static final SpatialPredicate BBoxIntersects

Bounding box of the *indexed* shape, then Intersects.

BBoxWithin

public static final SpatialPredicate BBoxWithin

Bounding box of the *indexed* shape, then IsWithin.

Contains

public static final SpatialPredicate Contains

Meets the "Covers" OGC definition (boundary-neutral).

Intersects

public static final SpatialPredicate Intersects

Meets the "Intersects" OGC definition.

IsEqualTo

public static final SpatialPredicate IsEqualTo

Meets the "Equals" OGC definition.

IsDisjointTo

public static final SpatialPredicate IsDisjointTo

Meets the "Disjoint" OGC definition.

IsWithin

public static final SpatialPredicate IsWithin

Meets the "CoveredBy" OGC definition (boundary-neutral).

Overlaps

public static final SpatialPredicate Overlaps

Almost meets the "Overlaps" OGC definition, but boundary-neutral (boundary==interior).

Constructor Detail

SpatialPredicate

protected SpatialPredicate(String name)

Method Detail

register

protected void register(String name)

get

public static SpatialPredicate get(String v)

values

public static List<SpatialPredicate> values()

is

public static boolean is(SpatialPredicate op,
                         SpatialPredicate... tst)

evaluate

public abstract boolean evaluate(Shape indexedShape,
                                 Shape queryShape)

Returns whether the relationship between indexedShape and queryShape is satisfied by this operation.

getName

public String getName()

toString

public String toString()

Overrides:

toString in class Object