jxl.write.biff
Class CompoundFile

java.lang.Object
  |
  +--jxl.biff.BaseCompoundFile
        |
        +--jxl.write.biff.CompoundFile

final class CompoundFile

extends BaseCompoundFile

Writes out a compound file Header block is -1 Excel data is e..n (where is the head extension blocks, normally 0 and n is at least 8) Summary information (8 blocks) Document summary (8 blocks) BBD is block p..q (where p=e+n+16 and q-p+1 is the number of BBD blocks) Property storage block is q+b...r (normally 1 block) (where b is the number of BBD blocks)

Inner classes inherited from class jxl.biff.BaseCompoundFile

BaseCompoundFile.PropertyStorage

Field Summary

private int	bbdPos The current position within the bbd.
private int	bbdStartBlock The start block of the big block depot
private byte[]	bigBlockDepot The current bbd block
private byte[]	excelData The organized biff records which form the actual excel data
private int	excelDataBlocks The number of blocks it takes to store the excel data
private int	excelDataStartBlock The start block of the excel data
private int	extensionBlock The extension block for the header
private int	numBigBlockDepotBlocks The number of blocks it takes to store the big block depot
private int	numExtensionBlocks The number of extension blocks required for the header to describe the BBD
private java.io.OutputStream	out The stream to which the jumbled up data is written to
private int	requiredSize The size the excel data should be in order to comply with the general compound file format
private int	rootStartBlock The start block of the root entry
private int	size The size of the array

Fields inherited from class jxl.biff.BaseCompoundFile

BIG_BLOCK_DEPOT_BLOCKS_POS, BIG_BLOCK_SIZE, DIRECTORY_POS, EXTENSION_BLOCK_POS, identifier, NEXT_POS, NUM_BIG_BLOCK_DEPOT_BLOCKS_POS, NUM_EXTENSION_BLOCK_POS, PREVIOUS_POS, PROPERTY_STORAGE_BLOCK_SIZE, ROOT_START_BLOCK_POS, SIZE_OF_NAME_POS, SIZE_POS, SMALL_BLOCK_DEPOT_BLOCK_POS, SMALL_BLOCK_SIZE, SMALL_BLOCK_THRESHOLD, START_BLOCK_POS, TYPE_POS

Constructor Summary

CompoundFile(byte[] data, int l, java.io.OutputStream os)
Constructor

Method Summary

private void	checkBbdPos() Checks that the data can fit into the current BBD block.
void	write() Writes out the excel file in OLE compound file format
private void	writeBigBlockDepot() Writes out the Big Block Depot
private void	writeExcelData() Writes out the excel data, padding it out with empty bytes as necessary
private void	writeHeader() Writes the compound file header
private void	writePropertySets() Writes out the property sets

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

out

private java.io.OutputStream out

The stream to which the jumbled up data is written to

excelData

private byte[] excelData

The organized biff records which form the actual excel data

size

private int size

The size of the array

requiredSize

private int requiredSize

The size the excel data should be in order to comply with the general compound file format

numBigBlockDepotBlocks

private int numBigBlockDepotBlocks

The number of blocks it takes to store the big block depot

numExtensionBlocks

private int numExtensionBlocks

The number of extension blocks required for the header to describe the BBD

extensionBlock

private int extensionBlock

The extension block for the header

excelDataBlocks

private int excelDataBlocks

The number of blocks it takes to store the excel data

rootStartBlock

private int rootStartBlock

The start block of the root entry

excelDataStartBlock

private int excelDataStartBlock

The start block of the excel data

bbdStartBlock

private int bbdStartBlock

The start block of the big block depot

bbdPos

private int bbdPos

The current position within the bbd. Used when writing out the BBD

bigBlockDepot

private byte[] bigBlockDepot

The current bbd block

Constructor Detail

CompoundFile

public CompoundFile(byte[] data,
                    int l,
                    java.io.OutputStream os)

Constructor

Parameters:

l - the length of the data

os - the output stream to write to

data - the excel data

Method Detail

write

public void write()
           throws java.io.IOException

Writes out the excel file in OLE compound file format

Throws:

java.io.IOException -

writeExcelData

private void writeExcelData()
                     throws java.io.IOException

Writes out the excel data, padding it out with empty bytes as necessary

Throws:

java.io.IOException -

writeHeader

private void writeHeader()
                  throws java.io.IOException

Writes the compound file header

Throws:

java.io.IOException -

checkBbdPos

private void checkBbdPos()
                  throws java.io.IOException

Checks that the data can fit into the current BBD block. If not, then it moves on to the next block

Throws:

java.io.IOException -

writeBigBlockDepot

private void writeBigBlockDepot()
                         throws java.io.IOException

Writes out the Big Block Depot

Throws:

java.io.IOException -

writePropertySets

private void writePropertySets()
                        throws java.io.IOException

Writes out the property sets

Throws:

java.io.IOException -