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java.lang.Objectorg.apache.poi.poifs.storage.BATBlock
public final class BATBlock
A block of block allocation table entries. BATBlocks are created only through a static factory method: createBATBlocks.
Field Summary | |
---|---|
protected POIFSBigBlockSize |
bigBlockSize
Either 512 bytes ( POIFSConstants.SMALLER_BIG_BLOCK_SIZE )
or 4096 bytes (POIFSConstants.LARGER_BIG_BLOCK_SIZE ) |
Method Summary | |
---|---|
static int |
calculateStorageRequirements(POIFSBigBlockSize bigBlockSize,
int entryCount)
Calculate how many BATBlocks are needed to hold a specified number of BAT entries. |
static int |
calculateXBATStorageRequirements(POIFSBigBlockSize bigBlockSize,
int entryCount)
Calculate how many XBATBlocks are needed to hold a specified number of BAT entries. |
static BATBlock[] |
createBATBlocks(POIFSBigBlockSize bigBlockSize,
int[] entries)
Create an array of BATBlocks from an array of int block allocation table entries |
static BATBlock[] |
createXBATBlocks(POIFSBigBlockSize bigBlockSize,
int[] entries,
int startBlock)
Create an array of XBATBlocks from an array of int block allocation table entries |
protected void |
doWriteData(java.io.OutputStream stream,
byte[] data)
Default implementation of write for extending classes that contain their data in a simple array of bytes. |
void |
writeBlocks(java.io.OutputStream stream)
Write the storage to an OutputStream |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
protected POIFSBigBlockSize bigBlockSize
POIFSConstants.SMALLER_BIG_BLOCK_SIZE
)
or 4096 bytes (POIFSConstants.LARGER_BIG_BLOCK_SIZE
)
Method Detail |
---|
public static BATBlock[] createBATBlocks(POIFSBigBlockSize bigBlockSize, int[] entries)
entries
- the array of int entries
public static BATBlock[] createXBATBlocks(POIFSBigBlockSize bigBlockSize, int[] entries, int startBlock)
entries
- the array of int entriesstartBlock
- the start block of the array of XBAT blocks
public static int calculateStorageRequirements(POIFSBigBlockSize bigBlockSize, int entryCount)
entryCount
- the number of entries
public static int calculateXBATStorageRequirements(POIFSBigBlockSize bigBlockSize, int entryCount)
entryCount
- the number of entries
protected void doWriteData(java.io.OutputStream stream, byte[] data) throws java.io.IOException
stream
- the OutputStream to which the data should be
written.data
- the byte array of to be written.
java.io.IOException
- on problems writing to the specified
stream.public void writeBlocks(java.io.OutputStream stream) throws java.io.IOException
writeBlocks
in interface BlockWritable
stream
- the OutputStream to which the stored data should
be written
java.io.IOException
- on problems writing to the specified
stream
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