gov.nasa.worldwind.data
Interface DataRasterReaderFactory

All Known Implementing Classes:

BasicDataRasterReaderFactory

public interface DataRasterReaderFactory

Method Summary

DataRasterReader	findReaderFor(Object source, AVList params) Search the list of available data raster readers for one that will read a specified data source.
DataRasterReader	findReaderFor(Object source, AVList params, DataRasterReader[] readers) Search a specified list of data raster readers for one that will read a specified data source.
DataRasterReader[]	getReaders() Returns this class' list of readers.

Method Detail

findReaderFor

DataRasterReader findReaderFor(Object source,
                               AVList params)

Search the list of available data raster readers for one that will read a specified data source. The determination is based on both the data type and the data source reference; some readers may be able to open data of the corresponding type but not as, for example, an InputStream or a URL.

The list of readers searched is determined by the DataRasterReaderFactory associated with the current Configuration, as specified by the AVKey.DATA_RASTER_READER_FACTORY_CLASS_NAME. If no factory is specified in the configuration, BasicDataRasterReaderFactory is used.

Parameters:

source - the source to read. May by a File, a file path, a URL or an InputStream.

params - optional metadata associated with the data source that might be useful in determining the data reader. TODO: How does the caller determine which parameters are necessary or useful?

Returns:

a data reader for the specified source, or null if no reader can be found.

Throws:

IllegalArgumentException - if the source is null.

findReaderFor

DataRasterReader findReaderFor(Object source,
                               AVList params,
                               DataRasterReader[] readers)

Search a specified list of data raster readers for one that will read a specified data source. The determination is based on both the data type and the data source reference; some readers may be able to open data of the corresponding type but not as, for example, an InputStream or a URL.

Parameters:

source - the source to read. May by a File, a file path, a URL or an InputStream.

params - optional metadata associated with the data source that might be useful in determining the data reader.

readers - the list of readers to search.

Returns:

a data reader for the specified source, or null if no reader can be found.

Throws:

IllegalArgumentException - if either the source or the reader list is null.

getReaders

DataRasterReader[] getReaders()

Returns this class' list of readers.

Returns:

the list of readers.