org.geotools.referencing.operation.transform

Class AbstractMathTransform.Inverse

Object

Formattable

AbstractMathTransform

AbstractMathTransform.Inverse

All Implemented Interfaces:

Serializable, MathTransform

Enclosing class:

AbstractMathTransform

protected abstract class AbstractMathTransform.Inverse
extends AbstractMathTransform
implements 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

Author:

Martin Desruisseaux (IRD)

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class AbstractMathTransform

AbstractMathTransform.Inverse

Field Summary

Fields inherited from class Formattable

SINGLE_LINE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Inverse() Constructs an inverse math transform.

Method Summary

Modifier and Type	Method and Description
Matrix	derivative(DirectPosition point) Gets the derivative of this transform at a point.
Matrix	derivative(Point2D point) Gets the derivative of this transform at a point.
boolean	equals(Object object) Compares the specified object with this inverse math transform for equality.
protected String	formatWKT(Formatter formatter) Format the inner part of a Well Known Text (WKT) element.
String	getName() Returns a name for this math transform (never null).
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.
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 AbstractMathTransform

createTransformedShape, ensureNonNull, getParameterDescriptors, getParameterValues, needCopy, normalizeAngle, rollLongitude, transform, transform, transform, transform, transform

Methods inherited from class Formattable

cleanupThreadLocals, toString, toWKT, toWKT, toWKT, toWKT

Methods inherited from class Object

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

Methods inherited from interface MathTransform

toWKT, transform

Constructor Detail

Inverse

protected Inverse()

Constructs an inverse math transform.

Method Detail

getName

public String getName()

Returns a name for this math transform (never null). The default implementation returns the direct transform name concatenated with localized flavor (when available) of "(Inverse transform)".

Overrides:

getName in class AbstractMathTransform

Returns:

A name for this math transform (never null).

Since:

2.5

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 MathTransform

Specified by:

getSourceDimensions in class AbstractMathTransform

Returns:

The dimension of input points.

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 MathTransform

Specified by:

getTargetDimensions in class AbstractMathTransform

Returns:

The dimension of output points.

derivative

public Matrix derivative(Point2D point)
                  throws 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:

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

See Also:

MathTransform2D.derivative(Point2D)

derivative

public Matrix derivative(DirectPosition point)
                  throws 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:

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

inverse

public MathTransform inverse()

Returns the inverse of this math transform, which is the enclosing math transform. This behavior should not be changed since some implementation assume that the inverse of this is always AbstractMathTransform.this.

Specified by:

inverse in interface MathTransform

Overrides:

inverse in class AbstractMathTransform

Returns:

The inverse transform.

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

Returns:

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

hashCode

public int hashCode()

Returns a hash code value for this math transform.

Overrides:

hashCode in class AbstractMathTransform

equals

public boolean equals(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

Parameters:

object - The object to compare with this transform.

Returns:

true if the given object is a transform of the same class and if, given identical source position, the transformed position would be the equals.

formatWKT

protected 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.

See Also:

Formattable.toWKT(), Formattable.toString()