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Java Source Code / Java Documentation » Collaboration » poi 3.0.2 beta2 » org.apache.poi.poifs.storage

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Class Diagram

Java Document (Java Doc)

java.lang .Object

org.apache.poi.poifs.storage .BlockAllocationTableWriter

BlockAllocationTableWriter

public class BlockAllocationTableWriter implements BlockWritable,BATManaged(Code)

This class manages and creates the Block Allocation Table, which is basically a set of linked lists of block indices.

Each block of the filesystem has an index. The first block, the header, is skipped; the first block after the header is index 0, the next is index 1, and so on.

A block's index is also its index into the Block Allocation Table. The entry that it finds in the Block Allocation Table is the index of the next block in the linked list of blocks making up a file, or it is set to -2: end of list.
author:
Marc Johnson (mjohnson at apache dot org)

Constructor Summary
public	BlockAllocationTableWriter()

Method Summary
public int	allocateSpace(int blockCount)
public int	countBlocks()
public int	createBlocks()
public int	getStartBlock()
public void	setStartBlock(int start_block)
void	simpleCreateBlocks()
public void	writeBlocks(OutputStream stream)

Constructor Detail

BlockAllocationTableWriter
public BlockAllocationTableWriter()(Code)
	create a BlockAllocationTableWriter

Method Detail

allocateSpace
public int allocateSpace(int blockCount)(Code)
	Allocate space for a block of indices Parameters: blockCount - the number of blocks to allocate space for the starting index of the blocks

countBlocks
public int countBlocks()(Code)
	Return the number of BigBlock's this instance uses count of BigBlock instances

createBlocks
public int createBlocks()(Code)
	Create the BATBlocks we need start block index of BAT blocks

getStartBlock
public int getStartBlock()(Code)
	get the starting block the starting block index

setStartBlock
public void setStartBlock(int start_block)(Code)
	Set the start block for this instance Parameters: start_block -

simpleCreateBlocks
void simpleCreateBlocks()(Code)
	create the BATBlocks

writeBlocks
public void writeBlocks(OutputStream stream) throws IOException(Code)
	Write the storage to an OutputStream Parameters: stream - the OutputStream to which the stored data shouldbe written exception: IOException - on problems writing to the specifiedstream

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
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native public int hashCode()(Code)(Java Doc)
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public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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