org.geotools.referencing.operation.transform
Class AbstractMathTransform.Inverse

java.lang.Object
  org.geotools.referencing.wkt.Formattable
      org.geotools.referencing.operation.transform.AbstractMathTransform
          org.geotools.referencing.operation.transform.AbstractMathTransform.Inverse

All Implemented Interfaces:

org.opengis.referencing.operation.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.

Since:

2.0

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.referencing.operation.transform.AbstractMathTransform

AbstractMathTransform.Inverse

Constructor Summary

protected

AbstractMathTransform.Inverse() Constructs an inverse math transform.

Method Summary

org.opengis.referencing.operation.Matrix	derivative(org.opengis.spatialschema.geometry.DirectPosition point) Gets the derivative of this transform at a point.
org.opengis.referencing.operation.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.
protected java.lang.String	formatWKT(Formatter formatter) Format the inner part of a Well Known Text (WKT) element.
int	getSourceDimensions() Gets the dimension of input points.
int	getTargetDimensions() Gets the dimension of output points.
int	hashCode() Returns a hash code value for this math transform.
org.opengis.referencing.operation.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.

Methods inherited from class org.geotools.referencing.operation.transform.AbstractMathTransform

createTransformedShape, ensureNonNull, getDimSource, getDimTarget, getParameterDescriptors, getParameterValues, needCopy, rollLongitude, transform, transform, transform

Methods inherited from class org.geotools.referencing.wkt.Formattable

toString, toWKT, toWKT, toWKT

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.opengis.referencing.operation.MathTransform

toWKT, transform

Constructor Detail

AbstractMathTransform.Inverse

protected AbstractMathTransform.Inverse()

Constructs an inverse math transform.

Method Detail

getSourceDimensions

public int getSourceDimensions()

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

Specified by:

getSourceDimensions in interface org.opengis.referencing.operation.MathTransform

Specified by:

getSourceDimensions in class AbstractMathTransform

getTargetDimensions

public int getTargetDimensions()

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

Specified by:

getTargetDimensions in interface org.opengis.referencing.operation.MathTransform

Specified by:

getTargetDimensions in class AbstractMathTransform

derivative

public org.opengis.referencing.operation.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 org.opengis.referencing.operation.Matrix derivative(org.opengis.spatialschema.geometry.DirectPosition 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 org.opengis.referencing.operation.MathTransform

Overrides:

derivative in class AbstractMathTransform

Parameters:

point - The coordinate point where to evaluate the derivative.

Returns:

The derivative at the specified point (never ).

Throws:

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

inverse

public final org.opengis.referencing.operation.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 is always .

Specified by:

inverse in interface org.opengis.referencing.operation.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 org.opengis.referencing.operation.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 in an instance of the same class than , and then test their enclosing math transforms.

Overrides:

equals in class AbstractMathTransform

formatWKT

protected java.lang.String formatWKT(Formatter formatter)

Format the inner part of a Well Known Text (WKT) element. If this inverse math transform has any parameter values, then this method format the WKT as in the super-class method. Otherwise this method format the math transform as an "INVERSE_MT" entity.

Overrides:

formatWKT in class AbstractMathTransform

Parameters:

formatter - The formatter to use.

Returns:

The WKT element name, which is "PARAM_MT" or "INVERSE_MT" in the default implementation.