org.deegree_impl.model.ct
Class ConcatenedTransform

java.lang.Object
  org.deegree_impl.model.ct.AbstractMathTransform
      org.deegree_impl.model.ct.ConcatenedTransform

All Implemented Interfaces:

MathTransform, java.io.Serializable

Direct Known Subclasses:

ConcatenedTransform2D, ConcatenedTransformDirect

class ConcatenedTransform

extends AbstractMathTransform

implements java.io.Serializable

Base class for concatened transform. Concatened transforms are serializable if all their step transforms are serializables.

Version:

1.0

Author:

Martin Desruisseaux

Nested Class Summary

Nested classes inherited from class org.deegree_impl.model.ct.AbstractMathTransform

AbstractMathTransform.Inverse

Field Summary

private MathTransform	inverse The inverse transform.
private MathTransformFactory	provider The math transform factory that created this concatened transform.
private static long	serialVersionUID Serial number for interoperability with different versions.
protected MathTransform	transform1 The first math transform.
protected MathTransform	transform2 The second math transform.

Constructor Summary

ConcatenedTransform(MathTransformFactory provider, MathTransform transform1, MathTransform transform2)
Construct a concatenated transform.

Method Summary

private static void	addWKT(java.lang.StringBuffer buffer, MathTransform transform, boolean first) Append to a string buffer the WKT for the specified math transform.
Matrix	derivative(CoordinatePoint point) Gets the derivative of this transform at a point.
boolean	equals(java.lang.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.
private static java.lang.String	getName(MathTransform transform) Returns a name for the specified coordinate system.
int	hashCode() Returns a hash value for this transform.
MathTransform	inverse() Creates the inverse transform of this object.
boolean	isIdentity() Tests whether this transform does not move any points.
protected boolean	isValid() Check if transforms are compatibles.
java.lang.String	toString() Returns the WKT for this math transform.
CoordinatePoint	transform(CoordinatePoint ptSrc, CoordinatePoint ptDst) Transforms the specified ptSrc and stores the result in ptDst.
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_impl.model.ct.AbstractMathTransform

addParameter, addParameter, createTransformedShape, createTransformedShape, derivative, getName, paramMT, toOpenGIS, transform

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

Serial number for interoperability with different versions.

See Also:

Constant Field Values

provider

private MathTransformFactory provider

The math transform factory that created this concatened transform. Will be used for creating the inverse transform when needed.

transform1

protected final MathTransform transform1

The first math transform.

transform2

protected final MathTransform transform2

The second math transform.

inverse

private transient MathTransform inverse

The inverse transform. This field will be computed only when needed.

Constructor Detail

ConcatenedTransform

public ConcatenedTransform(MathTransformFactory provider,
                           MathTransform transform1,
                           MathTransform transform2)

Construct a concatenated transform.

Method Detail

getName

private static final java.lang.String getName(MathTransform transform)

Returns a name for the specified coordinate system.

isValid

protected boolean isValid()

Check if transforms are compatibles. The default implementation check if transfert dimension match.

getDimSource

public final int getDimSource()

Gets the dimension of input points.

Specified by:

getDimSource in interface MathTransform

See Also:

CT_MathTransform.getDimSource()

getDimTarget

public final int getDimTarget()

Gets the dimension of output points.

Specified by:

getDimTarget in interface MathTransform

See Also:

CT_MathTransform.getDimTarget()

transform

public CoordinatePoint transform(CoordinatePoint ptSrc,
                                 CoordinatePoint ptDst)
                          throws TransformException

Transforms the specified ptSrc and stores the result in ptDst.

Specified by:

transform in interface MathTransform

Overrides:

transform in class AbstractMathTransform

Throws:

TransformException

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.

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

Throws:

TransformException

inverse

public final MathTransform inverse()
                            throws NoninvertibleTransformException

Creates the inverse transform of this object.

Specified by:

inverse in interface MathTransform

Overrides:

inverse in class AbstractMathTransform

Throws:

NoninvertibleTransformException

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.

isIdentity

public final boolean isIdentity()

Tests whether this transform does not move any points. Default implementation check if the two transforms are identity. This a way too conservative aproach, but it it doesn't hurt since ConcatenedTransform should not have been created if it were to result in an identity transform (this case should have been detected earlier).

Specified by:

isIdentity in interface MathTransform

Returns:

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

hashCode

public final int hashCode()

Returns a hash value for this transform.

Overrides:

hashCode in class AbstractMathTransform

equals

public final boolean equals(java.lang.Object object)

Compares the specified object with this math transform for equality.

Overrides:

equals in class AbstractMathTransform

toString

public final java.lang.String toString()

Returns the WKT for this math transform.

Overrides:

toString in class AbstractMathTransform

addWKT

private static void addWKT(java.lang.StringBuffer buffer,
                           MathTransform transform,
                           boolean first)

Append to a string buffer the WKT for the specified math transform.