com.luciad.reference.format

LuciadLightspeedClass TLcdEPSGModelReferenceDecoder

java.lang.Object

com.luciad.reference.format.TLcdEPSGModelReferenceDecoder

All Implemented Interfaces:

ILcdInputStreamFactoryCapable, ILcdModelReferenceDecoder

@LcdService(service=ILcdModelReferenceDecoder.class,
            priority=20000)
public class TLcdEPSGModelReferenceDecoder
extends Object
implements ILcdModelReferenceDecoder, ILcdInputStreamFactoryCapable

This ILcdModelReferenceDecoder decodes model references based on .epsg files corresponding to the given source files. A .epsg file contains a single decimal EPSG code, formatted as "n" or "EPSG:n", that defines a georeference. Any lines starting with a hash sign "#" are treated as comments and ignored.

The decoder first tries to find a .epsg file by replacing the extension of the source file by .epsg.

If this fails, it tries to find a directory.epsg file next to the source file.

If this fails, it tries to find a DIRECTORY.EPSG file next to the source file.

If this fails, it throws an IOException.

See TLcdEPSGReferenceParser for a list of supported epsg codes.

Since:

8.0

See Also:

TLcdEPSGReferenceParser, TLcdCompositeModelReferenceDecoder

Nested Class Summary

Nested classes/interfaces inherited from interface com.luciad.model.ILcdModelReferenceDecoder

ILcdModelReferenceDecoder.ModelReferenceWithSource

Constructor Summary

Constructors

Constructor and Description
TLcdEPSGModelReferenceDecoder()

Method Summary

Modifier and Type	Method and Description
ILcdModelReference	decodeModelReference(String aDataSourceName) Returns the model reference, associated with the specified data source.
ILcdModelReferenceDecoder.ModelReferenceWithSource	findAndDecodeModelReference(String aSource) Tries to locate the model reference file by replacing the suffix by '.epsg', or adding the suffix '.epsg' if there was no suffix looking for a 'directory.epsg' in the same directory, looking for a 'DIRECTORY.EPSG' in the same directory. If no such file is found, an IOException is thrown.
ILcdInputStreamFactory	getInputStreamFactory() Returns the input stream factory that is used for accessing .epsg files.
void	setInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory) Sets the input stream factory that will be used for accessing .epsg files.

Methods inherited from class java.lang.Object

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

Constructor Detail

TLcdEPSGModelReferenceDecoder

public TLcdEPSGModelReferenceDecoder()

Method Detail

setInputStreamFactory

public void setInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory)

Sets the input stream factory that will be used for accessing .epsg files.

Specified by:

setInputStreamFactory in interface ILcdInputStreamFactoryCapable

Parameters:

aInputStreamFactory - the factory responsible to generate input streams from which the model references will be decoded.

See Also:

getInputStreamFactory()

getInputStreamFactory

public ILcdInputStreamFactory getInputStreamFactory()

Returns the input stream factory that is used for accessing .epsg files.

Specified by:

getInputStreamFactory in interface ILcdInputStreamFactoryCapable

Returns:

the factory responsible to generate input streams from which the model references are decoded.

See Also:

setInputStreamFactory(ILcdInputStreamFactory)

decodeModelReference

public ILcdModelReference decodeModelReference(String aDataSourceName)
                                        throws IOException

Returns the model reference, associated with the specified data source. This implementation delegates to findAndDecodeModelReference(java.lang.String) and returns the resulting model reference.

Specified by:

decodeModelReference in interface ILcdModelReferenceDecoder

Parameters:

aDataSourceName - a data source for which to return the model reference; typically a file name or a URL.

Returns:

the ILcdModelReference associated with the data source. While null is allowed, implementors are advised to throw an error instead.

Throws:

IOException - if the ILcdModelReference cannot be decoded.
When the thread on which this method is called is interrupted, it is recommended to stop the decoding and throw an InterruptedIOException. This same exception can also be used if the decoder shows UI to the user, and the user cancels the decoding through the UI.

findAndDecodeModelReference

public ILcdModelReferenceDecoder.ModelReferenceWithSource findAndDecodeModelReference(String aSource)
                                                                               throws IOException

Tries to locate the model reference file by

1. replacing the suffix by '.epsg', or adding the suffix '.epsg' if there was no suffix
2. looking for a 'directory.epsg' in the same directory,
3. looking for a 'DIRECTORY.EPSG' in the same directory.

If no such file is found, an IOException is thrown.

Specified by:

findAndDecodeModelReference in interface ILcdModelReferenceDecoder

Parameters:

aSource - the location of the data file for which to locate and decode a reference file.

Returns:

an ILcdModelReference decoded from one of the files as described above, along with the location of that file.

Throws:

IOException - if none of the files as described above exists, or when the file found cannot be decoded as a properties file.