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org.globus.ftp
Interface DataSource

All Known Implementing Classes:

DataSourceStream, FileRandomIO, OutputStreamDataSource

public interface DataSource

Data channel uses this interface to read outgoing data. Implement it to provide your own ways of reading data. It must be thread safe; in parallel transfer mode several streams may attempt to read.

Method Summary

void	close() Closes this data source and releases any system resources associated with this source.
Buffer	read() Reads a data buffer from this data source.
long	totalSize() Optional operation.

Method Detail

read

Buffer read()
            throws IOException

Reads a data buffer from this data source.

Returns:

The data buffer read. Null, if there is no more data to be read.

Throws:

IOException - if an I/O error occurs.

close

void close()
           throws IOException

Closes this data source and releases any system resources associated with this source.

Throws:

IOException - if an I/O error occurs.

totalSize

long totalSize()
               throws IOException

Optional operation. Returns the total size, in bytes, of the data in this source. If the implementation is not able to provide a total size for the data source, it should return -1

Throws:

IOException - if an I/O exception occurs