DefaultCoordinateOperationFactory (Geotools modules 21.0 API)

Object
- AbstractFactory
- - ReferencingFactory
  - - AbstractCoordinateOperationFactory
    - - DefaultCoordinateOperationFactory

All Implemented Interfaces:

Factory, RegistrableFactory, ObjectFactory, CoordinateOperationFactory

Direct Known Subclasses:

AuthorityBackedFactory
```
public class DefaultCoordinateOperationFactory
extends AbstractCoordinateOperationFactory
```
Creates coordinate operations. This factory is capable to find coordinate transformations or conversions between two coordinate reference systems. It delegates most of its work to one or many of createOperationStep methods. Subclasses can override those methods in order to extend the factory capability to some more CRS.

Since:

2.1

Author:

Martin Desruisseaux (IRD)

Field Summary
- Fields inherited from class AbstractCoordinateOperationFactory
  AXIS_CHANGES, DATUM_SHIFT, ELLIPSOID_SHIFT, GEOCENTRIC_CONVERSION, IDENTITY, INVERSE_OPERATION
- Fields inherited from class ReferencingFactory
  LOGGER
- Fields inherited from class AbstractFactory
  hints, MAXIMUM_PRIORITY, MINIMUM_PRIORITY, NORMAL_PRIORITY, priority

Constructor Summary

Constructors
Constructor and Description
`DefaultCoordinateOperationFactory()` Constructs a coordinate operation factory using the default factories.
`DefaultCoordinateOperationFactory(Hints userHints)` Constructs a coordinate operation factory using the specified hints.
`DefaultCoordinateOperationFactory(Hints userHints, int priority)` Constructs a coordinate operation factory using the specified hints and priority.

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`protected CoordinateOperation`	`createFromDatabase(CoordinateReferenceSystem sourceCRS, CoordinateReferenceSystem targetCRS)` If the coordinate operation is explicitly defined in some database (typically EPSG), returns it.
`CoordinateOperation`	`createOperation(CoordinateReferenceSystem sourceCRS, CoordinateReferenceSystem targetCRS)` Returns an operation for conversion or transformation between two coordinate reference systems.
`CoordinateOperation`	`createOperation(CoordinateReferenceSystem sourceCRS, CoordinateReferenceSystem targetCRS, OperationMethod method)` Deprecated. Current implementation ignore the `method` argument.
`protected CoordinateOperation`	`createOperationStep(CompoundCRS sourceCRS, CompoundCRS targetCRS)` Creates an operation between two compound coordinate reference systems.
`protected CoordinateOperation`	`createOperationStep(CompoundCRS sourceCRS, SingleCRS targetCRS)` Creates an operation from a compound to a single coordinate reference systems.
`protected CoordinateOperation`	`createOperationStep(GeocentricCRS sourceCRS, GeocentricCRS targetCRS)` Creates an operation between two geocentric coordinate reference systems.
`protected CoordinateOperation`	`createOperationStep(GeocentricCRS sourceCRS, GeographicCRS targetCRS)` Creates an operation from a geocentric to a geographic coordinate reference systems.
`protected CoordinateOperation`	`createOperationStep(GeographicCRS sourceCRS, GeocentricCRS targetCRS)` Creates an operation from a geographic to a geocentric coordinate reference systems.
`protected CoordinateOperation`	`createOperationStep(GeographicCRS sourceCRS, GeographicCRS targetCRS)` Creates an operation between two geographic coordinate reference systems.
`protected CoordinateOperation`	`createOperationStep(GeographicCRS sourceCRS, ProjectedCRS targetCRS)` Creates an operation from a geographic to a projected coordinate reference system.
`protected CoordinateOperation`	`createOperationStep(GeographicCRS sourceCRS, VerticalCRS targetCRS)` Creates an operation between a geographic and a vertical coordinate reference systems.
`protected CoordinateOperation`	`createOperationStep(ProjectedCRS sourceCRS, GeographicCRS targetCRS)` Creates an operation from a projected to a geographic coordinate reference system.
`protected CoordinateOperation`	`createOperationStep(ProjectedCRS sourceCRS, ProjectedCRS targetCRS)` Creates an operation between two projected coordinate reference systems.
`protected CoordinateOperation`	`createOperationStep(SingleCRS sourceCRS, CompoundCRS targetCRS)` Creates an operation from a single to a compound coordinate reference system.
`protected CoordinateOperation`	`createOperationStep(TemporalCRS sourceCRS, TemporalCRS targetCRS)` Creates an operation between two temporal coordinate reference systems.
`protected CoordinateOperation`	`createOperationStep(VerticalCRS sourceCRS, VerticalCRS targetCRS)` Creates an operation between two vertical coordinate reference systems.
`protected Set<CoordinateOperation>`	`findFromDatabase(CoordinateReferenceSystem sourceCRS, CoordinateReferenceSystem targetCRS, int limit)` Returns a list of available coordinate operations explicitly defined in some database (typically EPSG), for the provided CRS pair.
`Set<CoordinateOperation>`	`findOperations(CoordinateReferenceSystem sourceCRS, CoordinateReferenceSystem targetCRS)` Returns all the available operations for conversion or transformation between two coordinate reference systems.
`protected Set<CoordinateOperation>`	`findOperations(CoordinateReferenceSystem sourceCRS, CoordinateReferenceSystem targetCRS, int limit)` Returns all the available operations for conversion or transformation between two coordinate reference systems.
`protected Set<CoordinateOperation>`	`findOperationSteps(CompoundCRS sourceCRS, CompoundCRS targetCRS, int limit)` Returns all available operations between two compound coordinate reference systems.
`protected Set<CoordinateOperation>`	`findOperationSteps(CompoundCRS sourceCRS, SingleCRS targetCRS, int limit)` Returns all available operations from a compound to a single coordinate reference system.
`protected Set<CoordinateOperation>`	`findOperationSteps(GeographicCRS sourceCRS, ProjectedCRS targetCRS, int limit)` Returns all available operations from a geographic to a projected coordinate reference system.
`protected Set<CoordinateOperation>`	`findOperationSteps(ProjectedCRS sourceCRS, GeographicCRS targetCRS, int limit)` Returns all available operations from a projected to a geographic coordinate reference system.
`protected Set<CoordinateOperation>`	`findOperationSteps(ProjectedCRS sourceCRS, ProjectedCRS targetCRS, int limit)` Returns all available operations between two projected coordinate reference systems.
`protected Set<CoordinateOperation>`	`findOperationSteps(SingleCRS sourceCRS, CompoundCRS targetCRS, int limit)` Returns all available operations from a single to a compound coordinate reference system.

Methods inherited from class AbstractCoordinateOperationFactory
concatenate, concatenate, concatenate, concatenate, createConcatenatedOperation, createDefiningConversion, createFromAffineTransform, createFromMathTransform, createFromMathTransform, createFromParameters, ensureNonNull, getErrorMessage, getImplementationHints, getMathTransformFactory, inverse, swapAndScaleAxis

Methods inherited from class ReferencingFactory
getVendor

Methods inherited from class AbstractFactory
addImplementationHints, equals, getPriority, hashCode, onDeregistration, onRegistration, toString

Methods inherited from class Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface Factory
getVendor

- Constructor Detail
  - DefaultCoordinateOperationFactory
```
public DefaultCoordinateOperationFactory()
```
    Constructs a coordinate operation factory using the default factories.
  - DefaultCoordinateOperationFactory
```
public DefaultCoordinateOperationFactory(Hints userHints)
```
    Constructs a coordinate operation factory using the specified hints. This constructor recognizes the CRS, CS, DATUM and MATH_TRANSFORM FACTORY hints.
    
    Parameters:
    
    userHints - The hints, or null if none.
  - DefaultCoordinateOperationFactory
```
public DefaultCoordinateOperationFactory(Hints userHints,
                                         int priority)
```
    Constructs a coordinate operation factory using the specified hints and priority. This constructor recognizes the CRS, CS, DATUM and MATH_TRANSFORM FACTORY hints.
    
    Parameters:
    
    userHints - The hints, or null if none.
    
    priority - The priority for this factory, as a number between MINIMUM_PRIORITY and MAXIMUM_PRIORITY inclusive.
    
    Since:
    
    2.2
- Method Detail
  - createOperation
```
public CoordinateOperation createOperation(CoordinateReferenceSystem sourceCRS,
                                           CoordinateReferenceSystem targetCRS)
                                    throws OperationNotFoundException,
                                           FactoryException
```
    Returns an operation for conversion or transformation between two coordinate reference systems. If an operation exists, it is returned. If more than one operation exists, the default is returned. If no operation exists, then the exception is thrown.
    The default implementation inspects the CRS and delegates the work to one or many createOperationStep(...) methods. This method fails if no path between the CRS is found.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    limit - The maximum number of operations to be returned. Use -1 to return all the available operations. Use 1 to return just one operation. Currently, the behavior for other values of limit is undefined.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    OperationNotFoundException - if no operation path was found from sourceCRS to targetCRS.
    
    FactoryException - if the operation creation failed for some other reason.
  - findOperations
```
public Set<CoordinateOperation> findOperations(CoordinateReferenceSystem sourceCRS,
                                               CoordinateReferenceSystem targetCRS)
                                        throws FactoryException
```
    Returns all the available operations for conversion or transformation between two coordinate reference systems. If no operation exists, then an empty set is returned.
    The default implementation inspects the CRS and delegates the work to one or many createOperationStep(...) methods. This method fails if no path between the CRSs is found.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A Set of coordinate operations from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - if the operation creation failed for some other reason.
  - findOperations
```
protected Set<CoordinateOperation> findOperations(CoordinateReferenceSystem sourceCRS,
                                                  CoordinateReferenceSystem targetCRS,
                                                  int limit)
                                           throws FactoryException
```
    Returns all the available operations for conversion or transformation between two coordinate reference systems. If no operation exists, then an empty set is returned.
    The default implementation inspects the CRS and delegates the work to one or many createOperationStep(...) methods. This method fails if no path between the CRSs is found.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    limit - The maximum number of operations to be returned. Use -1 to return all the available operations. Use 1 to return just one operations. Currently, the behavior for other values of limit is undefined.
    
    Returns:
    
    A Set of coordinate operations from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - if the operation creation failed for some other reason.
  - createOperation
```
public CoordinateOperation createOperation(CoordinateReferenceSystem sourceCRS,
                                           CoordinateReferenceSystem targetCRS,
                                           OperationMethod method)
                                    throws OperationNotFoundException,
                                           FactoryException
```
    Deprecated. Current implementation ignore the method argument.
    
    Returns an operation using a particular method for conversion or transformation between two coordinate reference systems. If the operation exists on the implementation, then it is returned. If the operation does not exist on the implementation, then the implementation has the option of inferring the operation from the argument objects. If for whatever reason the specified operation will not be returned, then the exception is thrown.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    method - the algorithmic method for conversion or transformation
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    OperationNotFoundException - if no operation path was found from sourceCRS to targetCRS.
    
    FactoryException - if the operation creation failed for some other reason.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(TemporalCRS sourceCRS,
                                                  TemporalCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation between two temporal coordinate reference systems. The default implementation checks if both CRS use the same datum, and then adjusts for axis direction, units and epoch.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(VerticalCRS sourceCRS,
                                                  VerticalCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation between two vertical coordinate reference systems. The default implementation checks if both CRS use the same datum, and then adjusts for axis direction and units.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(GeographicCRS sourceCRS,
                                                  VerticalCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation between a geographic and a vertical coordinate reference systems. The default implementation accepts the conversion only if the geographic CRS is a tri dimensional one and the vertical CRS is for height above the ellipsoid. More elaborated operation, like transformation from ellipsoidal to geoidal height, should be implemented here.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(GeographicCRS sourceCRS,
                                                  GeographicCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation between two geographic coordinate reference systems. The default implementation can adjust axis order and orientation (e.g. transforming from (NORTH,WEST) to (EAST,NORTH)), performs units conversion and apply datum shifts if needed.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(ProjectedCRS sourceCRS,
                                                  ProjectedCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation between two projected coordinate reference systems. The default implementation can adjust axis order and orientation. It also performs units conversion if it is the only extra change needed. Otherwise, it performs three steps:
    - Unproject from sourceCRS to its base geographic CRS.
    - Convert the source to target base geographic CRS.
    - Project from the base geographic CRS to the targetCRS.
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - findOperationSteps
```
protected Set<CoordinateOperation> findOperationSteps(ProjectedCRS sourceCRS,
                                                      ProjectedCRS targetCRS,
                                                      int limit)
                                               throws FactoryException
```
    Returns all available operations between two projected coordinate reference systems. The default implementation can adjust axis order and orientation. It also performs units conversion if it is the only extra change needed. Otherwise, it performs three steps:
    - Unproject from sourceCRS to its base geographic CRS.
    - Convert the source to target base geographic CRS.
    - Project from the base geographic CRS to the targetCRS.
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    limit - The maximum number of operations to be returned. Use -1 to return all the available operations. Use 1 to return just one operation. Currently, the behavior for other values of limit is undefined.
    
    Returns:
    
    A Set of coordinate operations from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(GeographicCRS sourceCRS,
                                                  ProjectedCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation from a geographic to a projected coordinate reference system. The default implementation constructs the following operation chain:
    sourceCRS → baseCRS → targetCRS
    where the conversion from baseCRS to targetCRS is obtained from targetCRS.getConversionFromBase().
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - findOperationSteps
```
protected Set<CoordinateOperation> findOperationSteps(GeographicCRS sourceCRS,
                                                      ProjectedCRS targetCRS,
                                                      int limit)
                                               throws FactoryException
```
    Returns all available operations from a geographic to a projected coordinate reference system. The default implementation constructs the following operation chain:
    sourceCRS → baseCRS → targetCRS
    where the conversion from baseCRS to targetCRS is obtained from targetCRS.getConversionFromBase().
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    limit - The maximum number of operations to be returned. Use -1 to return all the available operations. Use 1 to return just one operations. Currently, the behavior for other values of limit is undefined.
    
    Returns:
    
    A Set of coordinate operations from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(ProjectedCRS sourceCRS,
                                                  GeographicCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation from a projected to a geographic coordinate reference system. The default implementation constructs the following operation chain:
    sourceCRS → baseCRS → targetCRS
    where the conversion from sourceCRS to baseCRS is obtained from the inverse of sourceCRS.getConversionFromBase().
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - findOperationSteps
```
protected Set<CoordinateOperation> findOperationSteps(ProjectedCRS sourceCRS,
                                                      GeographicCRS targetCRS,
                                                      int limit)
                                               throws FactoryException
```
    Returns all available operations from a projected to a geographic coordinate reference system. The default implementation constructs the following operation chain:
    sourceCRS → baseCRS → targetCRS
    where the conversion from sourceCRS to baseCRS is obtained from the inverse of sourceCRS.getConversionFromBase().
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    limit - The maximum number of operations to be returned. Use -1 to return all the available operations. Use 1 to return just one operations. Currently, the behavior for other values of limit is undefined.
    
    Returns:
    
    A Set of coordinate operations from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(GeocentricCRS sourceCRS,
                                                  GeocentricCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation between two geocentric coordinate reference systems. The default implementation can adjust for axis order and orientation, performs units conversion and apply Bursa Wolf transformation if needed.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(GeographicCRS sourceCRS,
                                                  GeocentricCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation from a geographic to a geocentric coordinate reference systems. If the source CRS doesn't have a vertical axis, height above the ellipsoid will be assumed equals to zero everywhere. The default implementation uses the "Ellipsoid_To_Geocentric" math transform.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(GeocentricCRS sourceCRS,
                                                  GeographicCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation from a geocentric to a geographic coordinate reference systems. The default implementation use the "Geocentric_To_Ellipsoid" math transform.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(CompoundCRS sourceCRS,
                                                  SingleCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation from a compound to a single coordinate reference systems.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - findOperationSteps
```
protected Set<CoordinateOperation> findOperationSteps(CompoundCRS sourceCRS,
                                                      SingleCRS targetCRS,
                                                      int limit)
                                               throws FactoryException
```
    Returns all available operations from a compound to a single coordinate reference system.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    limit - The maximum number of operations to be returned. Use -1 to return all the available operations. Use 1 to return just one operations. Currently, the behavior for other values of limit is undefined.
    
    Returns:
    
    A Set of coordinate operations from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(SingleCRS sourceCRS,
                                                  CompoundCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation from a single to a compound coordinate reference system.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - findOperationSteps
```
protected Set<CoordinateOperation> findOperationSteps(SingleCRS sourceCRS,
                                                      CompoundCRS targetCRS,
                                                      int limit)
                                               throws FactoryException
```
    Returns all available operations from a single to a compound coordinate reference system.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    limit - The maximum number of operations to be returned. Use -1 to return all the available operations. Use 1 to return just one operations. Currently, the behavior for other values of limit is undefined.
    
    Returns:
    
    A Set of coordinate operations from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createOperationStep
```
protected CoordinateOperation createOperationStep(CompoundCRS sourceCRS,
                                                  CompoundCRS targetCRS)
                                           throws FactoryException
```
    Creates an operation between two compound coordinate reference systems.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - findOperationSteps
```
protected Set<CoordinateOperation> findOperationSteps(CompoundCRS sourceCRS,
                                                      CompoundCRS targetCRS,
                                                      int limit)
                                               throws FactoryException
```
    Returns all available operations between two compound coordinate reference systems.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    limit - The maximum number of operations to be returned. Use -1 to return all the available operations. Use 1 to return just one operations. Currently, the behavior for other values of limit is undefined.
    
    Returns:
    
    A Set of coordinate operations from sourceCRS to targetCRS.
    
    Throws:
    
    FactoryException - If the operation can't be constructed.
  - createFromDatabase
```
protected CoordinateOperation createFromDatabase(CoordinateReferenceSystem sourceCRS,
                                                 CoordinateReferenceSystem targetCRS)
```
    If the coordinate operation is explicitly defined in some database (typically EPSG), returns it. Otherwise (if there is no database, or if the database doesn't contains an explicit operation from sourceCRS to targetCRS, or if this method failed to create an operation from the database), returns null.
    The default implementation always returns null, since there is no database connected to a DefaultCoordinateOperationFactory instance. In other words, the default implementation is "standalone": it tries to figure out transformation paths by itself. Subclasses should override this method if they can fetch a more accurate operation from some database. The mean subclass doing so is AuthorityBackedFactory.
    This method is invoked by createOperation(sourceCRS, targetCRS) before to try to figure out a transformation path by itself. It is also invoked by various createOperationStep(...) methods when an intermediate CRS was obtained by GeneralDerivedCRS.getBaseCRS() (this case occurs especially during geographic from/to projected CRS operations). This method is not invoked for synthetic CRS generated by createOperationStep(...), since those temporary CRS are not expected to exist in a database.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    Returns:
    
    A coordinate operation from sourceCRS to targetCRS if and only if one is explicitly defined in some underlying database, or null otherwise.
    
    Since:
    
    2.3
  - findFromDatabase
```
protected Set<CoordinateOperation> findFromDatabase(CoordinateReferenceSystem sourceCRS,
                                                    CoordinateReferenceSystem targetCRS,
                                                    int limit)
```
    Returns a list of available coordinate operations explicitly defined in some database (typically EPSG), for the provided CRS pair. Otherwise (if there is no database, or if the database doesn't contains any explicit operation from sourceCRS to targetCRS, or if this method failed to create the operations from the database), returns an empty Set.
    The default implementation always returns an empty Set, since there is no database connected to a DefaultCoordinateOperationFactory instance. In other words, the default implementation is "standalone": it tries to figure out transformation paths by itself. Subclasses should override this method if they can fetch a more accurate operation from some database. The mean subclass doing so is AuthorityBackedFactory.
    This method is invoked by findOperations(sourceCRS, targetCRS) before to try to figure out a transformation path by itself. It is also invoked by various findOperationSteps(...) methods when an intermediate CRS was obtained by GeneralDerivedCRS.getBaseCRS() (this case occurs especially during geographic from/to projected CRS operations). This method is not invoked for synthetic CRS generated by createOperationStep(...), since those temporary CRS are not expected to exist in a database.
    
    Parameters:
    
    sourceCRS - Input coordinate reference system.
    
    targetCRS - Output coordinate reference system.
    
    limit - The maximum number of operations to be returned. Use -1 to return all the available operations. Use 1 to return just one operations. Currently, the behavior for other values of limit is undefined.
    
    Returns:
    
    A set of coordinate operations from sourceCRS to targetCRS if and only if one is explicitly defined in some underlying database, or an empty Set otherwise.
    
    Since:
    
    2.3

Class DefaultCoordinateOperationFactory

Field Summary

Fields inherited from class AbstractCoordinateOperationFactory

Fields inherited from class ReferencingFactory

Fields inherited from class AbstractFactory

Constructor Summary

Method Summary

Methods inherited from class AbstractCoordinateOperationFactory

Methods inherited from class ReferencingFactory

Methods inherited from class AbstractFactory

Methods inherited from class Object

Methods inherited from interface Factory

Constructor Detail

DefaultCoordinateOperationFactory

DefaultCoordinateOperationFactory

DefaultCoordinateOperationFactory

Method Detail

createOperation

findOperations

findOperations

createOperation

createOperationStep

createOperationStep

createOperationStep

createOperationStep

createOperationStep

findOperationSteps

createOperationStep

findOperationSteps

createOperationStep

findOperationSteps

createOperationStep

createOperationStep

createOperationStep

createOperationStep

findOperationSteps

createOperationStep

findOperationSteps

createOperationStep

findOperationSteps

createFromDatabase

findFromDatabase