org.deegree_impl.model.geometry
Class GM_Curve_Impl

java.lang.Object
  org.deegree_impl.model.geometry.GM_Object_Impl
      org.deegree_impl.model.geometry.GM_Primitive_Impl
          org.deegree_impl.model.geometry.GM_OrientablePrimitive_Impl
              org.deegree_impl.model.geometry.GM_OrientableCurve_Impl
                  org.deegree_impl.model.geometry.GM_Curve_Impl

All Implemented Interfaces:

GM_Curve, GM_GenericCurve, GM_Object, GM_OrientableCurve, GM_OrientablePrimitive, GM_Primitive, java.io.Serializable

class GM_Curve_Impl

extends GM_OrientableCurve_Impl

implements GM_Curve, GM_GenericCurve, java.io.Serializable

default implementation of the GM_Curve interface from package jago.model. ------------------------------------------------------------

Version:

14.10.2001

Author:

Andreas Poth

Field Summary

protected char	orientation
protected java.util.ArrayList	segments
private static long	serialVersionUID Use serialVersionUID for interoperability.

Fields inherited from class org.deegree_impl.model.geometry.GM_Object_Impl

boundary, centroid, convexHull, crs, empty, envelope, mute, valid

Constructor Summary

GM_Curve_Impl(char orientation, GM_CurveSegment[] segments)
initialize the curve by submitting a spatial reference system, an array of curve segments and the orientation of the curve

GM_Curve_Impl(GM_CurveSegment[] segments)
initialize the curve by submitting a spatial reference system and an array of curve segments. the orientation of the curve is '+'

Method Summary

void	addCurveSegment(GM_CurveSegment segment) adds a segment at the end of the curve
private void	calculateBoundary() calculates the boundary of the Curve
private void	calculateCentroid() calculates the centroid of the Curve
private void	calculateEnvelope() calculates the envelope of the Curve
protected void	calculateParam() recalculates internal parameters
java.lang.Object	clone() returns a shallow copy of the geometry
void	deleteCurveSegmentAt(int index) deletes the segment at the submitted index
boolean	equals(java.lang.Object other) checks if this curve is completly equal to the submitted geometry
GM_LineString	getAsLineString() returns the curve as GM_LineString. if there isn't a curve segment within the curve null will be returned
int	getCoordinateDimension() The operation "coordinateDimension" shall return the dimension of the coordinates that define this GM_Object, which must be the same as the coordinate dimension of the coordinate reference system for this GM_Object.
GM_CurveBoundary	getCurveBoundary() returns the boundary of the curve
GM_CurveSegment	getCurveSegmentAt(int index) returns the curve segment at the submitted index
int	getDimension() The operation "dimension" shall return the inherent dimension of this GM_Object, which shall be less than or equal to the coordinate dimension.
GM_Point	getEndPoint() returns the last point of the curve.if the curve doesn't contain a segment or the last segment doesn't contain a point null will be returned
double	getLength() returns the length of the curve in units of the related spatial reference system
int	getNumberOfCurveSegments() returns the number of segments building the curve
char	getOrientation() returns the orientation of a curve
GM_Point	getStartPoint() returns the first point of the curve. if the curve doesn't contain a segment or the first segment doesn't contain a point null will be returned
void	insertCurveSegmentAt(GM_CurveSegment segment, int index) inserts a segment in the curve at the submitted position. all points with a position that equals index or is higher will be shifted
boolean	intersects(GM_Object gmo) The Boolean valued operation "intersects" shall return TRUE if this GM_Object intersects another GM_Object.
boolean	isEmpty() returns true if no segment is within the curve
void	setCurveSegmentAt(GM_CurveSegment segment, int index) writes a segment to the curve at submitted position. the old point will be deleted
void	setOrientation(char orientation) sets the curves orientation
java.lang.String	toString()
void	translate(double[] d) translate each point of the curve with the values of the submitted double array.

Methods inherited from class org.deegree_impl.model.geometry.GM_Object_Impl

contains, contains, difference, distance, getBoundary, getBuffer, getCentroid, getConvexHull, getCoordinateSystem, getEnvelope, intersection, isValid, isWithinDistance, setCoordinateSystem, setEmpty, setValid, union

Methods inherited from class java.lang.Object

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

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

getOrientation, setOrientation

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

contains, contains, difference, distance, getBoundary, getBuffer, getCentroid, getConvexHull, getCoordinateSystem, getEnvelope, intersection, isWithinDistance, union

Field Detail

serialVersionUID

private static final long serialVersionUID

Use serialVersionUID for interoperability.

See Also:

Constant Field Values

segments

protected java.util.ArrayList segments

orientation

protected char orientation

Constructor Detail

GM_Curve_Impl

public GM_Curve_Impl(GM_CurveSegment[] segments)
              throws GM_Exception

initialize the curve by submitting a spatial reference system and an array of curve segments. the orientation of the curve is '+'

Parameters:

segments - array of GM_CurveSegment

GM_Curve_Impl

public GM_Curve_Impl(char orientation,
                     GM_CurveSegment[] segments)
              throws GM_Exception

initialize the curve by submitting a spatial reference system, an array of curve segments and the orientation of the curve

Parameters:

segments - array of GM_CurveSegment

orientation - of the curve

Method Detail

calculateEnvelope

private void calculateEnvelope()

calculates the envelope of the Curve

calculateBoundary

private void calculateBoundary()

calculates the boundary of the Curve

calculateCentroid

private void calculateCentroid()

calculates the centroid of the Curve

calculateParam

protected void calculateParam()

Description copied from class: GM_Object_Impl

recalculates internal parameters

Specified by:

calculateParam in class GM_Object_Impl

getCurveBoundary

public GM_CurveBoundary getCurveBoundary()

returns the boundary of the curve

Specified by:

getCurveBoundary in interface GM_OrientableCurve

getDimension

public int getDimension()

The operation "dimension" shall return the inherent dimension of this GM_Object, which shall be less than or equal to the coordinate dimension. The dimension of a collection of geometric objects shall be the largest dimension of any of its pieces. Points are 0-dimensional, curves are 1-dimensional, surfaces are 2-dimensional, and solids are 3-dimensional.

Specified by:

getDimension in interface GM_Object

getCoordinateDimension

public int getCoordinateDimension()

The operation "coordinateDimension" shall return the dimension of the coordinates that define this GM_Object, which must be the same as the coordinate dimension of the coordinate reference system for this GM_Object.

Specified by:

getCoordinateDimension in interface GM_Object

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.

dummy implementation

Specified by:

intersects in interface GM_Object

Overrides:

intersects in class GM_Object_Impl

Parameters:

gmo - the GM_Object to intersect with

Returns:

true if the objects intersects, else false

getLength

public double getLength()

returns the length of the curve in units of the related spatial reference system

Specified by:

getLength in interface GM_GenericCurve

getNumberOfCurveSegments

public int getNumberOfCurveSegments()

returns the number of segments building the curve

Specified by:

getNumberOfCurveSegments in interface GM_Curve

getStartPoint

public GM_Point getStartPoint()

returns the first point of the curve. if the curve doesn't contain a segment or the first segment doesn't contain a point null will be returned

Specified by:

getStartPoint in interface GM_GenericCurve

getEndPoint

public GM_Point getEndPoint()

returns the last point of the curve.if the curve doesn't contain a segment or the last segment doesn't contain a point null will be returned

Specified by:

getEndPoint in interface GM_GenericCurve

getAsLineString

public GM_LineString getAsLineString()
                              throws GM_Exception

returns the curve as GM_LineString. if there isn't a curve segment within the curve null will be returned

Specified by:

getAsLineString in interface GM_GenericCurve

Throws:

GM_Exception

getCurveSegmentAt

public GM_CurveSegment getCurveSegmentAt(int index)
                                  throws GM_Exception

returns the curve segment at the submitted index

Specified by:

getCurveSegmentAt in interface GM_Curve

Parameters:

index - index of the curve segment that should be returned

Throws:

GM_Exception - a exception will be thrown if index is smaller than '0' or larger than getNumberOfCurveSegments()-1

setCurveSegmentAt

public void setCurveSegmentAt(GM_CurveSegment segment,
                              int index)
                       throws GM_Exception

writes a segment to the curve at submitted position. the old point will be deleted

Specified by:

setCurveSegmentAt in interface GM_Curve

Parameters:

segment - curve segment that should be set

index - index where to set the curve segment

Throws:

GM_Exception - a exception will be thrown if index is smaller than '0' or larger than getNumberOfCurveSegments()-1 or or the starting point of the submitted curve segment isn't equal to the ending point of segment at index-1 and/or the ending point of the submitted segment isn't equals to the curve segment at index+1

insertCurveSegmentAt

public void insertCurveSegmentAt(GM_CurveSegment segment,
                                 int index)
                          throws GM_Exception

inserts a segment in the curve at the submitted position. all points with a position that equals index or is higher will be shifted

Specified by:

insertCurveSegmentAt in interface GM_Curve

Parameters:

segment - curve segment that should be inserted

index - index where to insert the curve segment

Throws:

GM_Exception - a exception will be thrown if index is smaller than '0' or larger than getNumberOfCurveSegments()-1 or or the starting point of the submitted curve segment isn't equal to the ending point of segment at index-1 and/or the ending point of the submitted segment isn't equals to the curve segment at index+1

addCurveSegment

public void addCurveSegment(GM_CurveSegment segment)
                     throws GM_Exception

adds a segment at the end of the curve

Specified by:

addCurveSegment in interface GM_Curve

Parameters:

segment - curve segment that should be set

Throws:

GM_Exception - a exception will be thrown if the starting point of the submitted curve segment isn't equal to the ending point of the last segment.

deleteCurveSegmentAt

public void deleteCurveSegmentAt(int index)
                          throws GM_Exception

deletes the segment at the submitted index

Specified by:

deleteCurveSegmentAt in interface GM_Curve

Parameters:

index - index of the curve segement that should be removed from the curve.

Throws:

GM_Exception - will be thrown if index is smaller '0' or larger getNumberOfCurveSegments()-1

isEmpty

public boolean isEmpty()

returns true if no segment is within the curve

Specified by:

isEmpty in interface GM_Object

Overrides:

isEmpty in class GM_Object_Impl

translate

public void translate(double[] d)

translate each point of the curve with the values of the submitted double array.

Specified by:

translate in interface GM_Object

Overrides:

translate in class GM_Object_Impl

equals

public boolean equals(java.lang.Object other)

checks if this curve is completly equal to the submitted geometry

Overrides:

equals in class GM_Object_Impl

Parameters:

other - object to compare to

Returns:

true if the objects are equal, else false

clone

public java.lang.Object clone()

returns a shallow copy of the geometry

Overrides:

clone in class GM_Object_Impl

toString

public java.lang.String toString()

Overrides:

toString in class GM_Object_Impl

Returns:

getOrientation

public char getOrientation()

returns the orientation of a curve

Specified by:

getOrientation in interface GM_OrientablePrimitive

Returns:

curve orientation ('+'|'-')

setOrientation

public void setOrientation(char orientation)
                    throws GM_Exception

sets the curves orientation

Specified by:

setOrientation in interface GM_OrientablePrimitive

Parameters:

orientation - orientation of the curve ('+'|'-')

Throws:

GM_Exception - will be thrown if orientation is invalid