# Interface Parameterized

All Known Implementing Classes:
  `AbstractMathTransform`, `AbstractMathTransform​.Inverse`, `AbstractMathTransform1D`, `AbstractMathTransform1D​.Inverse`, `AbstractMathTransform2D`, `AbstractMathTransform2D​.Inverse`, `DatumShiftTransform`, `DefaultConversion`, `DefaultTransformation`, `EllipsoidToCentricTransform`, `EllipsoidToRadiusTransform`, `InterpolatedGeocentricTransform`, `InterpolatedTransform`, `MolodenskyTransform`, `PassThroughTransform`, `PoleRotation`, `WraparoundTransform`

public interface Parameterized
An object which can supply its parameters in a `ParameterValueGroup`. All Apache SIS implementations of `MathTransform` implement this interface.

Since:
  0.5

- ## Method Summary

  Modifier and Type
  Method
  Description
  `ParameterDescriptorGroup`
  `getParameterDescriptors()`
  Returns the parameter descriptors for this parameterized object, or `null` if unknown.
  `ParameterValueGroup`
  `getParameterValues()`
  Returns the parameter values for this parameterized object, or `null` if unknown.

- ## Method Details

  - ### getParameterDescriptors

    @OptionalCandidate ParameterDescriptorGroup getParameterDescriptors()
    Returns the parameter descriptors for this parameterized object, or `null` if unknown.
    Returns:
      the parameter descriptors for this object, or `null`.

  - ### getParameterValues

    @OptionalCandidate ParameterValueGroup getParameterValues()
    Returns the parameter values for this parameterized object, or `null` if unknown.

    #### Modifying parameter values

    Unless explicitly allowed by the implementation class, callers should not modify the values returned by this method. Implementers are encouraged to protect their internal data by returning an unmodifiable view or a copy of their parameters. If the caller wishes to edit parameter values, then (s)he should clone the parameters before to modify them, then use the modified parameters for creating a new `Parameterized` object.
    Returns:
      the parameter values for this object, or `null` if unknown.