Class GeometryFunction

java.lang.Object

com.vividsolutions.jump.workbench.ui.plugin.analysis.GeometryFunction

public abstract class GeometryFunction
extends Object

A function object for Geometry functions (which return a Geometry). Provides metadata about the function.

Version:

1.0

Author:

Martin Davis

Constructor Summary

Constructors

Constructor	Description
GeometryFunction(String name, int nArgs, int nParams)
GeometryFunction(String name, int nArgs, int nParams, String description)

Method Summary

Modifier and Type	Method	Description
abstract org.locationtech.jts.geom.Geometry	execute(org.locationtech.jts.geom.Geometry[] geom, double[] param)	Exectute the function on the geometry(s) in the geom array.
String	getDescription()
static GeometryFunction	getFunction(String name)
static GeometryFunction	getFunction(Collection<GeometryFunction> functions, String name)
static GeometryFunction[]	getFunctions()
int	getGeometryArgumentCount()
String	getName()
static List<String>	getNames()
static List<String>	getNames(Collection<GeometryFunction> functions)
int	getParameterCount()
String	toString()

Methods inherited from class Object

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

Constructor Details

GeometryFunction

public GeometryFunction(String name,
 int nArgs,
 int nParams)

GeometryFunction

public GeometryFunction(String name,
 int nArgs,
 int nParams,
 String description)

Method Details

getNames

public static List<String> getNames()

getNames

public static List<String> getNames(Collection<GeometryFunction> functions)

getFunction

public static GeometryFunction getFunction(String name)

getFunction

public static GeometryFunction getFunction(Collection<GeometryFunction> functions,
 String name)

getFunctions

public static GeometryFunction[] getFunctions()

getName

public String getName()

getGeometryArgumentCount

public int getGeometryArgumentCount()

getParameterCount

public int getParameterCount()

getDescription

public String getDescription()

execute

public abstract org.locationtech.jts.geom.Geometry execute(org.locationtech.jts.geom.Geometry[] geom,
 double[] param)

Exectute the function on the geometry(s) in the geom array. The function can expect that the correct number of geometry arguments is present in the array. Integer parameters must be passed as doubles. If no result can be computed for some reason, null should be returned to indicate this to the caller. Exceptions may be thrown and must be handled by the caller.

Parameters:

geom - the geometry arguments

param - any non-geometric arguments.

Returns:

the geometry result, or null if no result could be computed.

toString

public String toString()

Overrides:

toString in class Object