org.apache.lucene.spatial.query

Class SpatialArgs

java.lang.Object

org.apache.lucene.spatial.query.SpatialArgs

public class SpatialArgs
extends Object

Principally holds the query Shape and the SpatialOperation. It's used as an argument to some methods on SpatialStrategy.

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

Field Summary

Fields

Modifier and Type	Field and Description
static double	DEFAULT_DISTERRPCT

Constructor Summary

Constructors

Constructor and Description
SpatialArgs(SpatialOperation operation, com.spatial4j.core.shape.Shape shape)

Method Summary

Methods

Modifier and Type	Method and Description
static double	calcDistanceFromErrPct(com.spatial4j.core.shape.Shape shape, double distErrPct, com.spatial4j.core.context.SpatialContext ctx) Computes the distance given a shape and the distErrPct.
Double	getDistErr() The acceptable error of the shape.
Double	getDistErrPct() A measure of acceptable error of the shape as a fraction.
SpatialOperation	getOperation()
com.spatial4j.core.shape.Shape	getShape()
double	resolveDistErr(com.spatial4j.core.context.SpatialContext ctx, double defaultDistErrPct) Gets the error distance that specifies how precise the query shape is.
void	setDistErr(Double distErr)
void	setDistErrPct(Double distErrPct)
void	setOperation(SpatialOperation operation)
void	setShape(com.spatial4j.core.shape.Shape shape)
String	toString()
void	validate() Check if the arguments make sense -- throw an exception if not

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_DISTERRPCT

public static final double DEFAULT_DISTERRPCT

See Also:

Constant Field Values

Constructor Detail

SpatialArgs

public SpatialArgs(SpatialOperation operation,
           com.spatial4j.core.shape.Shape shape)

Method Detail

calcDistanceFromErrPct

public static double calcDistanceFromErrPct(com.spatial4j.core.shape.Shape shape,
                            double distErrPct,
                            com.spatial4j.core.context.SpatialContext ctx)

Computes the distance given a shape and the distErrPct. The algorithm is the fraction of the distance from the center of the query shape to its closest bounding box corner.

Parameters:

shape - Mandatory.

distErrPct - 0 to 0.5

ctx - Mandatory

Returns:

A distance (in degrees).

resolveDistErr

public double resolveDistErr(com.spatial4j.core.context.SpatialContext ctx,
                    double defaultDistErrPct)

Gets the error distance that specifies how precise the query shape is. This looks at getDistErr(), getDistErrPct(), and defaultDistErrPct.

Parameters:

defaultDistErrPct - 0 to 0.5

Returns:

>= 0

validate

public void validate()
              throws IllegalArgumentException

Check if the arguments make sense -- throw an exception if not

Throws:

IllegalArgumentException

toString

public String toString()

Overrides:

toString in class Object

getOperation

public SpatialOperation getOperation()

setOperation

public void setOperation(SpatialOperation operation)

getShape

public com.spatial4j.core.shape.Shape getShape()

setShape

public void setShape(com.spatial4j.core.shape.Shape shape)

getDistErrPct

public Double getDistErrPct()

A measure of acceptable error of the shape as a fraction. This effectively inflates the size of the shape but should not shrink it.

Returns:

0 to 0.5

See Also:

calcDistanceFromErrPct(com.spatial4j.core.shape.Shape, double, com.spatial4j.core.context.SpatialContext)

setDistErrPct

public void setDistErrPct(Double distErrPct)

getDistErr

public Double getDistErr()

The acceptable error of the shape. This effectively inflates the size of the shape but should not shrink it.

Returns:

>= 0

setDistErr

public void setDistErr(Double distErr)