public interface ILcdInputStreamFactory
ILcdInputStreamFactory creates an InputStream from a given source.
This can be used in implementations of ILcdModelDecoder
to implement, e.g., ways of securely transferring data from the actual source to the actual decoder.
ILcdModelDecoder| Modifier and Type | Method and Description |
|---|---|
default boolean |
canCreateInputStream(String aSource)
Checks whether this input stream factory can provide access to
aSource. |
InputStream |
createInputStream(String aSource)
Creates an
InputStream from aSource. |
default boolean canCreateInputStream(String aSource)
aSource. It is acceptable for this method to
return true for a source while createInputStream throws an exception for that same source.
For performance reasons, we strongly recommend that implementations perform only a simple test.
For example: check the structure of aSource to see if it is a URI with a specific scheme, but do not verify
that aSource really is accessible.
The default implementation of this method returns true.
Make sure to override this method if you can easily reject sources. This can help avoid pointless invocations of
createInputStream which would have to throw exceptions for unsupported sources.
aSource - the data source to be verified; typically a file name or a URL.true if this input stream factory can likely access the source, false otherwise.createInputStream(String)InputStream createInputStream(String aSource) throws IOException
InputStream from aSource.aSource - an accessible data source.InputStream from the data source.IOException - when aSource is not accepted by canCreateInputStream or is not accessible.canCreateInputStream(String)