org.geotools.ct
Class AbstractMathTransform.Inverse

java.lang.Object
  org.geotools.ct.AbstractMathTransform
      org.geotools.ct.AbstractMathTransform.Inverse

All Implemented Interfaces:

MathTransform, java.io.Serializable

Enclosing class:

AbstractMathTransform

protected abstract class AbstractMathTransform.Inverse

extends AbstractMathTransform

implements java.io.Serializable

Default implementation for inverse math transform. This inner class is the inverse of the enclosing MathTransform. It is serializable only if the enclosing math transform is also serializable.

Version:

$Id: AbstractMathTransform.java 17672 2006-01-19 00:25:55Z desruisseaux $

Author:

Martin Desruisseaux

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class org.geotools.ct.AbstractMathTransform

AbstractMathTransform.Inverse

Constructor Summary

AbstractMathTransform.Inverse()
Construct an inverse math transform.

Method Summary

Matrix	derivative(CoordinatePoint point) Gets the derivative of this transform at a point.
Matrix	derivative(java.awt.geom.Point2D point) Gets the derivative of this transform at a point.
boolean	equals(java.lang.Object object) Compares the specified object with this inverse math transform for equality.
int	getDimSource() Gets the dimension of input points.
int	getDimTarget() Gets the dimension of output points.
int	hashCode() Returns a hash code value for this math transform.
MathTransform	inverse() Returns the inverse of this math transform, which is the enclosing math transform.
boolean	isIdentity() Tests whether this transform does not move any points.
java.lang.String	toString() Returns the Well Know Text (WKT) for this inverse math transform.

Methods inherited from class org.geotools.ct.AbstractMathTransform

createTransformedShape, fromGeoAPI, getName, transform, transform, transform

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.geotools.ct.MathTransform

transform

Constructor Detail

AbstractMathTransform.Inverse

public AbstractMathTransform.Inverse()

Construct an inverse math transform.

Method Detail

getDimSource

public int getDimSource()

Gets the dimension of input points. The default implementation returns the dimension of output points of the enclosing math transform.

Specified by:

getDimSource in interface MathTransform

See Also:

CT_MathTransform.getDimSource()

getDimTarget

public int getDimTarget()

Gets the dimension of output points. The default implementation returns the dimension of input points of the enclosing math transform.

Specified by:

getDimTarget in interface MathTransform

See Also:

CT_MathTransform.getDimTarget()

derivative

public Matrix derivative(java.awt.geom.Point2D point)
                  throws org.opengis.referencing.operation.TransformException

Gets the derivative of this transform at a point. The default implementation compute the inverse of the matrix returned by the enclosing math transform.

Overrides:

derivative in class AbstractMathTransform

Parameters:

point - The coordinate point where to evaluate the derivative.

Returns:

The derivative at the specified point as a 2×2 matrix.

Throws:

org.opengis.referencing.operation.TransformException - if the derivative can't be evaluated at the specified point.

See Also:

MathTransform2D.derivative(Point2D)

derivative

public Matrix derivative(CoordinatePoint point)
                  throws org.opengis.referencing.operation.TransformException

Gets the derivative of this transform at a point. The default implementation compute the inverse of the matrix returned by the enclosing math transform.

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:

org.opengis.referencing.operation.TransformException - if the derivative can't be evaluated at the specified point.

inverse

public final MathTransform inverse()

Returns the inverse of this math transform, which is the enclosing math transform. This method is declared final because some implementation assume that the inverse of this is always AbstractMathTransform.this.

Specified by:

inverse in interface MathTransform

Overrides:

inverse in class AbstractMathTransform

isIdentity

public boolean isIdentity()

Tests whether this transform does not move any points. The default implementation delegate this tests to the enclosing math transform.

Specified by:

isIdentity in interface MathTransform

Overrides:

isIdentity in class AbstractMathTransform

hashCode

public int hashCode()

Returns a hash code value for this math transform.

Overrides:

hashCode in class AbstractMathTransform

equals

public boolean equals(java.lang.Object object)

Compares the specified object with this inverse math transform for equality. The default implementation tests if object in an instance of the same class than this, and then test their enclosing math transforms.

Overrides:

equals in class AbstractMathTransform

toString

public java.lang.String toString()

Returns the Well Know Text (WKT) for this inverse math transform.

Overrides:

toString in class AbstractMathTransform