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See:
Description
Interface Summary | |
---|---|
GeneralParameterDescriptor | Abstract definition of a parameter or group of parameters used by an operation method. |
GeneralParameterValue | Abstract parameter value or group of parameter values. |
ParameterDescriptor<T> | The definition of a parameter used by an operation method. |
ParameterDescriptorGroup | The definition of a group of related parameters used by an operation method. |
ParameterValue<T> | A parameter value used by an operation method. |
ParameterValueGroup | A group of related parameter values. |
Exception Summary | |
---|---|
InvalidParameterCardinalityException | Thrown by ParameterValueGroup if adding or removing a parameter value would result in more or less parameters than the expected range. |
InvalidParameterNameException | Thrown when an unexpected parameter was found in a parameter group. |
InvalidParameterTypeException | Thrown by ParameterValue getter methods when a value can not be casted to the
requested type. |
InvalidParameterValueException | Thrown by ParameterValue setter methods when they are given an invalid value. |
ParameterNotFoundException | Thrown by ParameterValueGroup and ParameterDescriptorGroup
when a parameter is requested but not found in that group. |
Description and storage of parameter values. The first two paragraphs below are adapted from OpenGIS® Spatial Referencing by Coordinates (Topic 2) specification.
Most parameter values are numeric, but for some operation methods, notably those implementing a grid interpolation algorithm, the parameter value could be a file name and location (this may be a URI). An example is the coordinate transformation from NAD 27 to NAD 83 in the USA; depending on the locations of the points to be transformed, one of a series of grid files should be used.
Some operation methods may require a large number of coordinate operation parameters. Also, some operation methods require that groups of parameters be repeatable as a group. In such cases, it is helpful to group related parameters in parameter groups. Two or more parameter groups are then associated with a particular operation method, and each parameter group consists of a set of operation parameters, or other, nested parameter groups. This way of modeling is not mandatory; all coordinate operation parameters may be assigned directly to the coordinate operation method.
Departure from OGC/ISO specification:
Moved theGeneralParameterDescriptor
,ParameterDescriptor
,ParameterDescriptorGroup
,GeneralParameterValue
,ParameterValue
,ParameterValueGroup
,InvalidParameterNameException
,InvalidParameterTypeException
andInvalidParameterValueException
interfaces fromorg.opengis.referencing.operation
toorg.opengis.parameter
. With this move, GeoAPI has extended the use of these parameter classes to a more general use rather than only for referencing operation types.
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