Package org.geotools.referencing.factory.gridshift

Class NTv2GridShiftFactory

Object
AbstractFactory
ReferencingFactory
NTv2GridShiftFactory
All Implemented Interfaces:
Factory, BufferedFactory, Factory, RegistrableFactory
public class NTv2GridShiftFactory extends ReferencingFactory implements BufferedFactory
Loads and caches NTv2 grid files. Thisthat incorporates a soft cache mechanism to keep grids in memory when first loaded. It also checks NTv2 grid file format in #isNTv2Grid(String) method.
Author:
Oscar Fonts

  • Field Details

    • LOGGER

      protected static final Logger LOGGER
      Logger.

  • Constructor Details

    • NTv2GridShiftFactory

      public NTv2GridShiftFactory()
      Constructs a factory with the default priority.

    • NTv2GridShiftFactory

      public NTv2GridShiftFactory(int priority)
      Constructs an instance using the specified priority level.
      Parameters:
      priority - The priority for this factory, as a number between MINIMUM_PRIORITY and MAXIMUM_PRIORITY inclusive.

  • Method Details

    • isNTv2Grid

      public boolean isNTv2Grid(URL location)
      Performs a NTv2 grid file lookup given its name, and checks for file format correctness.
      Parameters:
      location - The NTv2 grid file location
      Returns:
      true if file exists and is valid, false otherwise

    • createNTv2Grid

      public GridShiftFile createNTv2Grid(URL gridLocation) throws FactoryException
      Creates a NTv2 Grid.
      Parameters:
      gridLocation - The NTv2 grid file location
      Returns:
      the grid
      Throws:
      FactoryException - if grid cannot be created

    • isNTv2GridFileValid

      protected boolean isNTv2GridFileValid(URL url)
      Checks if a given resource is a valid NTv2 file without fully loading it.

      If file is not valid, the cause is logged at warning level.

      Parameters:
      url - the NTv2 file absolute path
      Returns:
      true if file has NTv2 format, false otherwise