org.deegree.model.spatialschema
Class SurfacePatchImpl

java.lang.Object
  org.deegree.model.spatialschema.SurfacePatchImpl

All Implemented Interfaces:

Serializable, GenericSurface

Direct Known Subclasses:

PolygonImpl

abstract class SurfacePatchImpl
extends Object
implements GenericSurface, Serializable

default implementation of the SurfacePatch interface from package jago.model. the class is abstract because it should be specialized by derived classes Polygon for example

Author:

Andreas Poth, last edited by: $Author: aschmitz $

Field Summary

protected double	area
protected Point	centroid
protected CoordinateSystem	crs
protected Ring	exteriorRing
protected Ring[]	interiorRings
protected SurfaceInterpolation	interpolation
protected boolean	valid

Constructor Summary

protected	SurfacePatchImpl(Ring exteriorRing, Ring[] interiorRings, CoordinateSystem crs)
protected	SurfacePatchImpl(SurfaceInterpolation interpolation, Position[] exteriorRing, Position[][] interiorRings, CoordinateSystem crs) Creates a new SurfacePatchImpl object.

Method Summary

protected Position	calculateCentroid(Position[] point) calculates the centroid of the surface patch taken from gems iv (modified) this method is only valid for the two-dimensional case.
protected void	calculateParam() calculates the centroid and the area of the surface patch
boolean	equals(Object other)
double	getArea() The operation "area" shall return the area of this GenericSurface.
Point	getCentroid() The operation "centroid" shall return the mathematical centroid for this Geometry.
CoordinateSystem	getCoordinateSystem() returns the coordinate system of the surface patch
Envelope	getEnvelope() returns the bounding box of the surface patch
Position[]	getExteriorRing() returns a reference to the exterior ring of the surface
Position[][]	getInteriorRings() returns a reference to the interior rings of the surface
SurfaceInterpolation	getInterpolation() The interpolation determines the surface interpolation mechanism used for this SurfacePatch.
double	getPerimeter() returns the length of all boundaries of the surface in a reference system appropriate for measuring distances.
protected boolean	isValid() returns true if the calculated parameters of the Geometry are valid and false if they must be recalculated
protected void	setValid(boolean valid) invalidates the calculated parameters of the Geometry
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

crs

protected CoordinateSystem crs

centroid

protected Point centroid

interpolation

protected SurfaceInterpolation interpolation

exteriorRing

protected Ring exteriorRing

interiorRings

protected Ring[] interiorRings

area

protected double area

valid

protected boolean valid

Constructor Detail

SurfacePatchImpl

protected SurfacePatchImpl(Ring exteriorRing,
                           Ring[] interiorRings,
                           CoordinateSystem crs)

Parameters:

exteriorRing -

interiorRings -

crs -

SurfacePatchImpl

protected SurfacePatchImpl(SurfaceInterpolation interpolation,
                           Position[] exteriorRing,
                           Position[][] interiorRings,
                           CoordinateSystem crs)
                    throws GeometryException

Creates a new SurfacePatchImpl object.

Parameters:

interpolation -

exteriorRing -

interiorRings -

crs -

Throws:

GeometryException

Method Detail

setValid

protected void setValid(boolean valid)

invalidates the calculated parameters of the Geometry

isValid

protected boolean isValid()

returns true if the calculated parameters of the Geometry are valid and false if they must be recalculated

getInterpolation

public SurfaceInterpolation getInterpolation()

The interpolation determines the surface interpolation mechanism used for this SurfacePatch. This mechanism uses the control points and control parameters defined in the various subclasses to determine the position of this SurfacePatch.

getEnvelope

public Envelope getEnvelope()

returns the bounding box of the surface patch

Specified by:

getEnvelope in interface GenericSurface

getExteriorRing

public Position[] getExteriorRing()

returns a reference to the exterior ring of the surface

Returns:

exterior ring as Positions

getInteriorRings

public Position[][] getInteriorRings()

returns a reference to the interior rings of the surface

Returns:

interior rings as Positions

getPerimeter

public double getPerimeter()

returns the length of all boundaries of the surface in a reference system appropriate for measuring distances.

Specified by:

getPerimeter in interface GenericSurface

getCoordinateSystem

public CoordinateSystem getCoordinateSystem()

returns the coordinate system of the surface patch

equals

public boolean equals(Object other)

Overrides:

equals in class Object

Parameters:

other -

Returns:

getCentroid

public Point getCentroid()

The operation "centroid" shall return the mathematical centroid for this Geometry. The result is not guaranteed to be on the object.

getArea

public double getArea()

The operation "area" shall return the area of this GenericSurface. The area of a 2 dimensional geometric object shall be a numeric measure of its surface area Since area is an accumulation (integral) of the product of two distances, its return value shall be in a unit of measure appropriate for measuring distances squared.

Specified by:

getArea in interface GenericSurface

calculateParam

protected void calculateParam()

calculates the centroid and the area of the surface patch

calculateCentroid

protected Position calculateCentroid(Position[] point)

calculates the centroid of the surface patch

taken from gems iv (modified)

this method is only valid for the two-dimensional case.

toString

public String toString()

Overrides:

toString in class Object