uk.org.ogsadai.common
Interface BlockBuffer

All Known Implementing Classes:

SimpleBlockBuffer

public interface BlockBuffer

An interface for buffering sequences of blocks and then retrieving the sequence as a single aggregate block.

Author:

The OGSA-DAI Project Team

Method Summary

void	appendBlock(java.lang.Object block) Appends the specified block to the buffer.
int	size() Returns a count of the number of blocks that have been appended to the buffer.
java.lang.Object	toBlock() Returns a single block containing all the data appended to the buffer.

Method Detail

appendBlock

public void appendBlock(java.lang.Object block)
                 throws OutOfMemoryException

Appends the specified block to the buffer.

Parameters:

block - The block to append.

Throws:

OutOfMemoryException - if there is not enough memory to retrieve the block.

toBlock

public java.lang.Object toBlock()
                         throws OutOfMemoryException

Returns a single block containing all the data appended to the buffer. If not data has been appended then null is returned.

Returns:

the data.

Throws:

OutOfMemoryException - if there is not enough memory to retrieve the block.

size

public int size()

Returns a count of the number of blocks that have been appended to the buffer.

Returns:

the count.