| Class | Description | 
|---|---|
| ByteArrayDataSource | 
 A DataSource backed by a byte array. 
 | 
| SharedByteArrayInputStream | 
 A ByteArrayInputStream that implements the SharedInputStream interface,
 allowing the underlying byte array to be shared between multiple readers. 
 | 
| SharedFileInputStream | 
 A  
SharedFileInputStream is a
 BufferedInputStream that buffers
 data from the file and supports the mark
 and reset methods. |