org.deegree.model.csct.ct
Class PassThroughTransform

java.lang.Object
  org.deegree.model.csct.ct.AbstractMathTransform
      org.deegree.model.csct.ct.PassThroughTransform

All Implemented Interfaces:

Serializable, MathTransform

final class PassThroughTransform
extends AbstractMathTransform
implements Serializable

Transform which passes through a subset of ordinates to another transform. This allows transforms to operate on a subset of ordinates. For example, if you have (latitude,longitude,height) coordinates, then you may wish to convert the height values from feet to meters without affecting the latitude and longitude values.

Version:

1.00

Author:

OpenGIS (www.opengis.org), Martin Desruisseaux

Nested Class Summary

Nested classes/interfaces inherited from class org.deegree.model.csct.ct.AbstractMathTransform

AbstractMathTransform.Inverse

Field Summary

protected int	firstAffectedOrdinate Index of the first affected ordinate.
protected int	numTrailingOrdinates Number of unaffected ordinates after the affected ones.
protected MathTransform	transform The sub transform.

Constructor Summary

PassThroughTransform(int firstAffectedOrdinate, MathTransform transform, int numTrailingOrdinates)
Create a pass through transform.

Method Summary

Matrix	derivative(CoordinatePoint point) Gets the derivative of this transform at a point.
boolean	equals(Object object) Compares the specified object with this math transform for equality.
int	getDimSource() Gets the dimension of input points.
int	getDimTarget() Gets the dimension of output points.
MathTransform	inverse() Creates the inverse transform of this object.
boolean	isIdentity() Tests whether this transform does not move any points.
String	toString() Returns the WKT for this math transform.
void	transform(double[] srcPts, int srcOff, double[] dstPts, int dstOff, int numPts) Transforms a list of coordinate point ordinal values.
void	transform(float[] srcPts, int srcOff, float[] dstPts, int dstOff, int numPts) Transforms a list of coordinate point ordinal values.

Methods inherited from class org.deegree.model.csct.ct.AbstractMathTransform

addParameter, addParameter, createTransformedShape, createTransformedShape, derivative, getName, hashCode, paramMT, transform, transform

Methods inherited from class java.lang.Object

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

Field Detail

firstAffectedOrdinate

protected final int firstAffectedOrdinate

Index of the first affected ordinate.

numTrailingOrdinates

protected final int numTrailingOrdinates

Number of unaffected ordinates after the affected ones. Always 0 when used through the strict OpenGIS API.

transform

protected final MathTransform transform

The sub transform.

Constructor Detail

PassThroughTransform

public PassThroughTransform(int firstAffectedOrdinate,
                            MathTransform transform,
                            int numTrailingOrdinates)

Create a pass through transform.

Parameters:

firstAffectedOrdinate - Index of the first affected ordinate.

transform - The sub transform.

numTrailingOrdinates - Number of trailing ordinates to pass through. Affected ordinates will range from firstAffectedOrdinate inclusive to dimTarget-numTrailingOrdinates exclusive.

Method Detail

getDimSource

public int getDimSource()

Gets the dimension of input points.

Specified by:

getDimSource in interface MathTransform

Returns:

the dimension of input points.

See Also:

"org.opengis.ct.CT_MathTransform#getDimSource()"

getDimTarget

public int getDimTarget()

Gets the dimension of output points.

Specified by:

getDimTarget in interface MathTransform

Returns:

the dimension of output points.

See Also:

"org.opengis.ct.CT_MathTransform#getDimTarget()"

isIdentity

public boolean isIdentity()

Tests whether this transform does not move any points.

Specified by:

isIdentity in interface MathTransform

Returns:

true if this MathTransform is an identity transform; false otherwise.

transform

public void transform(float[] srcPts,
                      int srcOff,
                      float[] dstPts,
                      int dstOff,
                      int numPts)
               throws TransformException

Transforms a list of coordinate point ordinal values.

Specified by:

transform in interface MathTransform

Overrides:

transform in class AbstractMathTransform

Parameters:

srcPts - the array containing the source point coordinates.

srcOff - the offset to the first point to be transformed in the source array.

dstPts - the array into which the transformed point coordinates are returned. May be the same than srcPts.

dstOff - the offset to the location of the first transformed point that is stored in the destination array.

numPts - the number of point objects to be transformed.

Throws:

TransformException - if a point can't be transformed.

transform

public void transform(double[] srcPts,
                      int srcOff,
                      double[] dstPts,
                      int dstOff,
                      int numPts)
               throws TransformException

Transforms a list of coordinate point ordinal values.

Specified by:

transform in interface MathTransform

Parameters:

srcPts - the array containing the source point coordinates.

srcOff - the offset to the first point to be transformed in the source array.

dstPts - the array into which the transformed point coordinates are returned. May be the same than srcPts.

dstOff - the offset to the location of the first transformed point that is stored in the destination array.

numPts - the number of point objects to be transformed.

Throws:

TransformException - if a point can't be transformed.

derivative

public Matrix derivative(CoordinatePoint point)
                  throws TransformException

Gets the derivative of this transform at a point.

Specified by:

derivative in interface MathTransform

Overrides:

derivative in class AbstractMathTransform

Parameters:

point - The coordinate point where to evaluate the derivative.

Returns:

The derivative at the specified point (never null).

Throws:

TransformException - if the derivative can't be evaluated at the specified point.

inverse

public MathTransform inverse()
                      throws NoninvertibleTransformException

Creates the inverse transform of this object.

Specified by:

inverse in interface MathTransform

Overrides:

inverse in class AbstractMathTransform

Returns:

The inverse transform.

Throws:

NoninvertibleTransformException - if the transform can't be inversed.

equals

public boolean equals(Object object)

Compares the specified object with this math transform for equality.

Overrides:

equals in class AbstractMathTransform

toString

public String toString()

Returns the WKT for this math transform.

Overrides:

toString in class AbstractMathTransform