org.deegree_impl.model.geometry
Class GM_Polygon_Impl

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

All Implemented Interfaces:

GM_GenericSurface, GM_Polygon, GM_SurfacePatch, java.io.Serializable

class GM_Polygon_Impl

extends GM_SurfacePatch_Impl

implements GM_Polygon, java.io.Serializable

default implementierung of the GM_Polygon interface from package jago.model. ------------------------------------------------------------

Version:

11.6.2001

Author:

Andreas Poth

Field Summary

protected double	area
private GM_SurfaceBoundary	boundary
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

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

Method Summary

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.
protected void	calculateParam() calculates the centroid and the area of the surface patch
java.lang.Object	clone() returns a shallow copy of the geometry
boolean	contains(GM_Object gmo) The Boolean valued operation "contains" shall return TRUE if this GM_Object contains another GM_Object.
private boolean	containsMultiObject(GM_Aggregate gmo)
boolean	equals(java.lang.Object other) checks if this curve is completly equal to the submitted geometry
double	getArea() The operation "area" shall return the area of this GM_GenericSurface.
GM_SurfaceBoundary	getBoundary() The operation "boundary" shall return the boundary of this GM_SurfacePatch represented as a collection of GM_Curves organized as a GM_SurfaceBoundary, consisting of GM_Curve instances along the boundary of the aggregate GM_Surface, and interior to the GM_Surface where GM_SurfacePatches are adjacent.
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.
boolean	intersects(GM_Object gmo) The Boolean valued operation "intersects" shall return TRUE if this GM_Object intersects another GM_Object.
private boolean	intersectsMultiObject(GM_Aggregate mprim) the operations returns true if the submitted multi primitive intersects with the curve segment
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

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

Methods inherited from interface org.deegree.model.geometry.GM_SurfacePatch

getArea, getCentroid, getCoordinateSystem, getExteriorRing, getInteriorRings, getInterpolation

Methods inherited from interface org.deegree.model.geometry.GM_GenericSurface

getEnvelope, getPerimeter

Field Detail

serialVersionUID

private static final long serialVersionUID

Use serialVersionUID for interoperability.

See Also:

Constant Field Values

boundary

private GM_SurfaceBoundary boundary

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_Polygon_Impl

public GM_Polygon_Impl(GM_SurfaceInterpolation interpolation,
                       GM_Position[] exteriorRing,
                       GM_Position[][] interiorRings,
                       CS_CoordinateSystem crs)
                throws GM_Exception

Creates a new GM_Polygon_Impl object.

Parameters:

interpolation -

exteriorRing -

interiorRings -

crs -

Throws:

GM_Exception

Method Detail

getBoundary

public GM_SurfaceBoundary getBoundary()

The operation "boundary" shall return the boundary of this GM_SurfacePatch represented as a collection of GM_Curves organized as a GM_SurfaceBoundary, consisting of GM_Curve instances along the boundary of the aggregate GM_Surface, and interior to the GM_Surface where GM_SurfacePatches are adjacent.

equals

public boolean equals(java.lang.Object other)

checks if this curve is completly equal to the submitted geometry

Overrides:

equals in class GM_SurfacePatch_Impl

Parameters:

other - object to compare to

Returns:

toString

public java.lang.String toString()

Overrides:

toString in class GM_SurfacePatch_Impl

Returns:

clone

public java.lang.Object clone()

returns a shallow copy of the geometry

intersects

public boolean intersects(GM_Object gmo)

The Boolean valued operation "intersects" shall return TRUE if this GM_Object intersects another GM_Object. Within a GM_Complex, the GM_Primitives do not intersect one another. In general, topologically structured data uses shared geometric objects to capture intersection information.

Specified by:

intersects in interface GM_SurfacePatch

intersectsMultiObject

private boolean intersectsMultiObject(GM_Aggregate mprim)
                               throws java.lang.Exception

the operations returns true if the submitted multi primitive intersects with the curve segment

Throws:

java.lang.Exception

contains

public boolean contains(GM_Object gmo)

The Boolean valued operation "contains" shall return TRUE if this GM_Object contains another GM_Object.

Specified by:

contains in interface GM_SurfacePatch

containsMultiObject

private boolean containsMultiObject(GM_Aggregate gmo)

Parameters:

gmo -

Returns:

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

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

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

calculateParam

protected void calculateParam()

calculates the centroid and the area of the surface patch

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.