org.deegree_impl.model.geometry
Class GM_SurfacePatch_Impl

java.lang.Object
  org.deegree_impl.model.geometry.GM_SurfacePatch_Impl

All Implemented Interfaces:

GM_GenericSurface, java.io.Serializable

Direct Known Subclasses:

GM_Polygon_Impl

abstract class GM_SurfacePatch_Impl

extends java.lang.Object

implements GM_GenericSurface, java.io.Serializable

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

Version:

11.6.2001

Author:

Andreas Poth

Field Summary

protected double	area
protected GM_Point	centroid
protected CS_CoordinateSystem	crs
protected GM_Envelope	envelope
protected GM_Position[]	exteriorRing
protected GM_Position[][]	interiorRings
protected GM_SurfaceInterpolation	interpolation
private static long	serialVersionUID Use serialVersionUID for interoperability.
protected boolean	valid

Constructor Summary

protected

GM_SurfacePatch_Impl(GM_SurfaceInterpolation interpolation, GM_Position[] exteriorRing, GM_Position[][] interiorRings, CS_CoordinateSystem crs) Creates a new GM_SurfacePatch_Impl object.

Method Summary

private double	calculateArea(GM_Position[] point) calculates the area of the surface patch taken from gems iv (modified) this method is only valid for the two-dimensional case.
protected GM_Position	calculateCentroid(GM_Position[] point) calculates the centroid of the surface patch taken from gems iv (modified) this method is only valid for the two-dimensional case.
private void	calculateCentroidArea() calculates the centroid and area of the surface patch. this method is only valid for the two-dimensional case.
private void	calculateEnvelope()
protected void	calculateParam() calculates the centroid and the area of the surface patch
boolean	equals(java.lang.Object other)
double	getArea() The operation "area" shall return the area of this GM_GenericSurface.
GM_Point	getCentroid() The operation "centroid" shall return the mathematical centroid for this GM_Object.
CS_CoordinateSystem	getCoordinateSystem() returns the coordinate system of the surface patch
GM_Envelope	getEnvelope() returns the bounding box of the surface patch
GM_Position[]	getExteriorRing() returns a reference to the exterior ring of the surface
GM_Position[][]	getInteriorRings() returns a reference to the interior rings of the surface
GM_SurfaceInterpolation	getInterpolation() The interpolation determines the surface interpolation mechanism used for this GM_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 GM_Object are valid and false if they must be recalculated
protected void	setValid(boolean valid) invalidates the calculated parameters of the GM_Object
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

Use serialVersionUID for interoperability.

See Also:

Constant Field Values

crs

protected CS_CoordinateSystem crs

envelope

protected GM_Envelope envelope

centroid

protected GM_Point centroid

interpolation

protected GM_SurfaceInterpolation interpolation

exteriorRing

protected GM_Position[] exteriorRing

interiorRings

protected GM_Position[][] interiorRings

area

protected double area

valid

protected boolean valid

Constructor Detail

GM_SurfacePatch_Impl

protected GM_SurfacePatch_Impl(GM_SurfaceInterpolation interpolation,
                               GM_Position[] exteriorRing,
                               GM_Position[][] interiorRings,
                               CS_CoordinateSystem crs)
                        throws GM_Exception

Creates a new GM_SurfacePatch_Impl object.

Parameters:

interpolation -

exteriorRing -

interiorRings -

crs -

Throws:

GM_Exception

Method Detail

setValid

protected void setValid(boolean valid)

invalidates the calculated parameters of the GM_Object

isValid

protected boolean isValid()

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

calculateEnvelope

private void calculateEnvelope()

getInterpolation

public GM_SurfaceInterpolation getInterpolation()

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

getEnvelope

public GM_Envelope getEnvelope()

returns the bounding box of the surface patch

Specified by:

getEnvelope in interface GM_GenericSurface

getExteriorRing

public GM_Position[] getExteriorRing()

returns a reference to the exterior ring of the surface

getInteriorRings

public GM_Position[][] getInteriorRings()

returns a reference to the interior rings of the surface

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 GM_GenericSurface

getCoordinateSystem

public CS_CoordinateSystem getCoordinateSystem()

returns the coordinate system of the surface patch

equals

public boolean equals(java.lang.Object other)

Parameters:

other -

Returns:

getCentroid

public GM_Point getCentroid()

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

getArea

public double getArea()

The operation "area" shall return the area of this GM_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 GM_GenericSurface

calculateCentroidArea

private void calculateCentroidArea()

calculates the centroid and area of the surface patch. this method is only valid for the two-dimensional case.

calculateParam

protected void calculateParam()

calculates the centroid and the area of the surface patch

calculateArea

private double calculateArea(GM_Position[] point)

calculates the area of the surface patch

taken from gems iv (modified)

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

calculateCentroid

protected GM_Position calculateCentroid(GM_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 java.lang.String toString()

Returns: