Package org.openstreetmap.josm.data.projection.datum

Class NTV2GridShiftFileWrapper

java.lang.Object

org.openstreetmap.josm.data.projection.datum.NTV2GridShiftFileWrapper

public class NTV2GridShiftFileWrapper
extends java.lang.Object

Wrapper for NTV2GridShiftFile. Loads the shift file from disk, when it is first accessed.

Since:

5226

Field Summary

Fields

Modifier and Type	Field	Description
private java.lang.String	gridFileName
private NTV2GridShiftFile	instance
static float	NTV2_SOURCE_PRIORITY_DOWNLOAD	Priority for downloaded NTV2 grid files
static float	NTV2_SOURCE_PRIORITY_LOCAL	Priority for local NTV2 grid files
private static java.util.Map<java.lang.Float,NTV2GridShiftFileSource>	sources

Constructor Summary

Constructors

Constructor	Description
NTV2GridShiftFileWrapper(java.lang.String filename)	Constructs a new NTV2GridShiftFileWrapper.

Method Summary

Modifier and Type	Method	Description
NTV2GridShiftFile	getShiftFile()	Returns the actual NTV2GridShiftFile behind this wrapper.
static void	registerNTV2GridShiftFileSource(float priority, NTV2GridShiftFileSource source)	Register a source for NTV2 grid files.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

instance

private NTV2GridShiftFile instance

gridFileName

private final java.lang.String gridFileName

NTV2_SOURCE_PRIORITY_LOCAL

public static final float NTV2_SOURCE_PRIORITY_LOCAL

Priority for local NTV2 grid files

See Also:

Constant Field Values

NTV2_SOURCE_PRIORITY_DOWNLOAD

public static final float NTV2_SOURCE_PRIORITY_DOWNLOAD

Priority for downloaded NTV2 grid files

See Also:

Constant Field Values

sources

private static final java.util.Map<java.lang.Float,NTV2GridShiftFileSource> sources

Constructor Detail

NTV2GridShiftFileWrapper

public NTV2GridShiftFileWrapper(java.lang.String filename)

Constructs a new NTV2GridShiftFileWrapper.

Parameters:

filename - Path to the grid file (GSB format)

Method Detail

registerNTV2GridShiftFileSource

public static void registerNTV2GridShiftFileSource(float priority,
                                                   NTV2GridShiftFileSource source)

Register a source for NTV2 grid files.

Parameters:

priority - the priority, sources with higher priority are checked first; use NTV2_SOURCE_PRIORITY_LOCAL for local files and NTV2_SOURCE_PRIORITY_DOWNLOAD for remote downloads

source - the NTV2 grid file source

Since:

12777

getShiftFile

public NTV2GridShiftFile getShiftFile()
                               throws java.io.IOException

Returns the actual NTV2GridShiftFile behind this wrapper. The grid file is only loaded once, when first accessed.

Returns:

The NTv2 grid file

Throws:

java.io.IOException - if the grid file cannot be found/loaded