org.apache.poi.poifs.storage
Interface BlockList

All Known Implementing Classes:

RawDataBlockList, SmallDocumentBlockList

public interface BlockList

Interface for lists of blocks that are mapped by block allocation tables

Author:

Marc Johnson (mjohnson at apache dot org

Method Summary

int	blockCount()
ListManagedBlock[]	fetchBlocks(int startBlock, int headerPropertiesStartBlock) get the blocks making up a particular stream in the list.
ListManagedBlock	remove(int index) remove and return the specified block from the list
void	setBAT(BlockAllocationTableReader bat) set the associated BlockAllocationTable
void	zap(int index) remove the specified block from the list

Method Detail

zap

void zap(int index)

remove the specified block from the list

Parameters:

index - the index of the specified block; if the index is out of range, that's ok

remove

ListManagedBlock remove(int index)
                        throws java.io.IOException

remove and return the specified block from the list

Parameters:

index - the index of the specified block

Returns:

the specified block

Throws:

java.io.IOException - if the index is out of range or has already been removed

fetchBlocks

ListManagedBlock[] fetchBlocks(int startBlock,
                               int headerPropertiesStartBlock)
                               throws java.io.IOException

get the blocks making up a particular stream in the list. The blocks are removed from the list.

Parameters:

startBlock - the index of the first block in the stream

headerPropertiesStartBlock - the index of the first header block in the stream

Returns:

the stream as an array of correctly ordered blocks

Throws:

java.io.IOException - if blocks are missing

setBAT

void setBAT(BlockAllocationTableReader bat)
            throws java.io.IOException

set the associated BlockAllocationTable

Parameters:

bat - the associated BlockAllocationTable

Throws:

java.io.IOException

blockCount

int blockCount()