Package org.geotools.referencing.operation

Class DefaultOperationMethod

Object

Formattable

AbstractIdentifiedObject

DefaultOperationMethod

All Implemented Interfaces:

Serializable, IdentifiedObject, OperationMethod, PROJFormattable

Direct Known Subclasses:

MathTransformProvider

public class DefaultOperationMethod
extends AbstractIdentifiedObject
implements OperationMethod, PROJFormattable

Definition of an algorithm used to perform a coordinate operation. Most operation methods use a number of operation parameters, although some coordinate conversions use none. Each coordinate operation using the method assigns values to these parameters.

Since:

2.1

Author:

Martin Desruisseaux (IRD)

See Also:

DefaultOperation, Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected int	sourceDimensions	Number of dimensions in the source CRS of this operation method.
protected int	targetDimensions	Number of dimensions in the target CRS of this operation method.

Fields inherited from class AbstractIdentifiedObject

EMPTY_ALIAS_ARRAY, EMPTY_IDENTIFIER_ARRAY, IDENTIFIER_COMPARATOR, NAME_COMPARATOR, REMARKS_COMPARATOR

Fields inherited from class Formattable

SINGLE_LINE

Fields inherited from interface IdentifiedObject

ALIAS_KEY, IDENTIFIERS_KEY, NAME_KEY, REMARKS_KEY

Fields inherited from interface OperationMethod

FORMULA_KEY

Constructor Summary

Constructors

Constructor	Description
DefaultOperationMethod(Map<String,?> properties, int sourceDimensions, int targetDimensions, ParameterDescriptorGroup parameters)	Constructs an operation method from a set of properties and a descriptor group.
DefaultOperationMethod(MathTransform transform)	Convenience constructor that creates an operation method from a math transform.
DefaultOperationMethod(OperationMethod method)	Constructs a new operation method with the same values than the specified one.
DefaultOperationMethod(OperationMethod method, int sourceDimensions, int targetDimensions)	Constructs a new operation method with the same values than the specified one except the dimensions.

Method Summary

Modifier and Type	Method	Description
static void	checkDimensions(OperationMethod method, MathTransform transform)	Checks if an operation method and a math transform have a compatible number of source and target dimensions.
boolean	equals(AbstractIdentifiedObject object, boolean compareMetadata)	Compare this operation method with the specified object for equality.
String	formatPROJ(PROJFormatter formatter)	Format the inner part of a PROJFormattable object.
protected String	formatWKT(Formatter formatter)	Format the inner part of a Well Known Text (WKT) element.
InternationalString	getFormula()	Formula(s) or procedure used by this operation method.
ParameterDescriptorGroup	getParameters()	Returns the set of parameters.
int	getSourceDimensions()	Number of dimensions in the source CRS of this operation method.
int	getTargetDimensions()	Number of dimensions in the target CRS of this operation method.
int	hashCode()	Returns a hash code value for this operation method.

Methods inherited from class AbstractIdentifiedObject

asSet, ensureAngularUnit, ensureLinearUnit, ensureNonNull, ensureNonNull, ensureTimeUnit, equals, equals, equals, equals, getAlias, getIdentifier, getIdentifier, getIdentifiers, getName, getName, getName, getProperties, getProperties, getRemarks, nameMatches, nameMatches, nameMatches

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 IdentifiedObject

getAlias, getIdentifiers, getName, getRemarks, toWKT

Field Detail

sourceDimensions

protected final int sourceDimensions

Number of dimensions in the source CRS of this operation method.

targetDimensions

protected final int targetDimensions

Number of dimensions in the target CRS of this operation method.

Constructor Detail

DefaultOperationMethod

public DefaultOperationMethod(MathTransform transform)

Convenience constructor that creates an operation method from a math transform. The information provided in the newly created object are approximative, and usually acceptable only as a fallback when no other information are available.

Parameters:

transform - The math transform to describe.

DefaultOperationMethod

public DefaultOperationMethod(OperationMethod method)

Constructs a new operation method with the same values than the specified one. This copy constructor provides a way to wrap an arbitrary implementation into a Geotools one or a user-defined one (as a subclass), usually in order to leverage some implementation-specific API. This constructor performs a shallow copy, i.e. the properties are not cloned.

Parameters:

method - The operation method to copy.

DefaultOperationMethod

public DefaultOperationMethod(OperationMethod method,
                              int sourceDimensions,
                              int targetDimensions)

Constructs a new operation method with the same values than the specified one except the dimensions.

Parameters:

method - The operation method to copy.

sourceDimensions - Number of dimensions in the source CRS of this operation method.

targetDimensions - Number of dimensions in the target CRS of this operation method.

DefaultOperationMethod

public DefaultOperationMethod(Map<String,?> properties,
                              int sourceDimensions,
                              int targetDimensions,
                              ParameterDescriptorGroup parameters)

Constructs an operation method from a set of properties and a descriptor group. The properties given in argument follow the same rules than for the super-class constructor. Additionally, the following properties are understood by this construtor:

Property name	Value type	Value given to
"formula"	String or InternationalString	getFormula()

Parameters:

properties - Set of properties. Should contains at least "name".

sourceDimensions - Number of dimensions in the source CRS of this operation method.

targetDimensions - Number of dimensions in the target CRS of this operation method.

parameters - The set of parameters, or null if none.

Method Detail

getFormula

public InternationalString getFormula()

Formula(s) or procedure used by this operation method. This may be a reference to a publication. Note that the operation method may not be analytic, in which case this attribute references or contains the procedure, not an analytic formula.

Specified by:

getFormula in interface OperationMethod

Returns:

The formula used by this method.

getSourceDimensions

public int getSourceDimensions()

Number of dimensions in the source CRS of this operation method.

Specified by:

getSourceDimensions in interface OperationMethod

Returns:

The dimension of source CRS.

getTargetDimensions

public int getTargetDimensions()

Number of dimensions in the target CRS of this operation method.

Specified by:

getTargetDimensions in interface OperationMethod

Returns:

The dimension of target CRS.

getParameters

public ParameterDescriptorGroup getParameters()

Returns the set of parameters.

Specified by:

getParameters in interface OperationMethod

Returns:

The parameters, or an empty group if none.

equals

public boolean equals(AbstractIdentifiedObject object,
                      boolean compareMetadata)

Compare this operation method with the specified object for equality. If compareMetadata is true, then all available properties are compared including formula.

Overrides:

equals in class AbstractIdentifiedObject

Parameters:

object - The object to compare to this.

compareMetadata - true for performing a strict comparaison, or false for comparing only properties relevant to transformations.

Returns:

true if both objects are equal.

hashCode

public int hashCode()

Returns a hash code value for this operation method.

Overrides:

hashCode in class AbstractIdentifiedObject

Returns:

The hash code value. This value doesn't need to be the same in past or future versions of this class.

formatWKT

protected String formatWKT(Formatter formatter)

Format the inner part of a Well Known Text (WKT) element.

Overrides:

formatWKT in class Formattable

Parameters:

formatter - The formatter to use.

Returns:

The WKT element name.

See Also:

Formattable.toWKT(), Formattable.toString()

checkDimensions

public static void checkDimensions(OperationMethod method,
                                   MathTransform transform)
                            throws MismatchedDimensionException

Checks if an operation method and a math transform have a compatible number of source and target dimensions. In the particular case of a pass through transform with more dimension than the expected number, the check will rather be performed against the sub transform.

This convenience method is provided for argument checking.

Parameters:

method - The operation method to compare to the math transform, or null.

transform - The math transform to compare to the operation method, or null.

Throws:

MismatchedDimensionException - if the number of dimensions are incompatibles.

formatPROJ

public String formatPROJ(PROJFormatter formatter)

Description copied from interface: PROJFormattable

Format the inner part of a PROJFormattable object.

This method is automatically invoked by PROJFormatter.append(PROJFormattable).

For example for a element (DefaultOperationMethod) of type Projection, the formatter will invoke this method to prepend the "+proj=" String for completing the PROJ String before appending the Projection Name (e.g. lcc for a Lambert Conformal Conic)

Specified by:

formatPROJ in interface PROJFormattable

Parameters:

formatter - The PROJFormatter to use.

Returns:

The proj String of the PROJ element type if any. (e.g. +ellps= for named ellipsoids, +datum= for named datums).