Package org.apache.poi.hdgf.streams
Class CompressedStreamStore
- java.lang.Object
-
- org.apache.poi.hdgf.streams.StreamStore
-
- org.apache.poi.hdgf.streams.CompressedStreamStore
-
public final class CompressedStreamStore extends StreamStore
A StreamStore where the data on-disk is compressed, using the crazy Visio LZW
-
-
Constructor Summary
Constructors Modifier Constructor Description protected
CompressedStreamStore(byte[] data, int offset, int length)
Creates a new compressed StreamStore, which will handle the decompression.
-
Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description protected byte[]
_getBlockHeader()
protected byte[]
_getCompressedContents()
protected void
copyBlockHeaderToContents()
Some kinds of streams expect their 4 byte header to be on the front of the contents.static byte[][]
decompress(byte[] data, int offset, int length)
Decompresses the given data, returning it as header + contents-
Methods inherited from class org.apache.poi.hdgf.streams.StreamStore
_getContents, getContents, prependContentsWith
-
-
-
-
Method Detail
-
_getCompressedContents
protected byte[] _getCompressedContents()
-
_getBlockHeader
protected byte[] _getBlockHeader()
-
copyBlockHeaderToContents
protected void copyBlockHeaderToContents()
Some kinds of streams expect their 4 byte header to be on the front of the contents. They can call this to have it sorted.- Overrides:
copyBlockHeaderToContents
in classStreamStore
-
decompress
public static byte[][] decompress(byte[] data, int offset, int length) throws java.io.IOException
Decompresses the given data, returning it as header + contents- Throws:
java.io.IOException
-
-