org.apache.poi.poifs.storage

Class RawDataBlock

java.lang.Object

org.apache.poi.poifs.storage.RawDataBlock

All Implemented Interfaces:

ListManagedBlock

public class RawDataBlock
extends java.lang.Object
implements ListManagedBlock

A big block created from an InputStream, holding the raw data

Author:

Marc Johnson (mjohnson at apache dot org

Constructor Summary

Constructors

Constructor and Description
RawDataBlock(java.io.InputStream stream) Constructor RawDataBlock
RawDataBlock(java.io.InputStream stream, int blockSize) Constructor RawDataBlock

Method Summary

Methods

Modifier and Type	Method and Description
boolean	eof() When we read the data, did we hit end of file?
byte[]	getData() Get the data from the block
boolean	hasData() Did we actually find any data to read? It's possible, in the event of a short last block, to both have hit the EoF, but also to have data

Methods inherited from class java.lang.Object

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

Constructor Detail

RawDataBlock

public RawDataBlock(java.io.InputStream stream)
             throws java.io.IOException

Constructor RawDataBlock

Parameters:

stream - the InputStream from which the data will be read

Throws:

java.io.IOException - on I/O errors, and if an insufficient amount of data is read (the InputStream must be an exact multiple of the block size)

RawDataBlock

public RawDataBlock(java.io.InputStream stream,
            int blockSize)
             throws java.io.IOException

Constructor RawDataBlock

Parameters:

stream - the InputStream from which the data will be read

blockSize - the size of the POIFS blocks, normally 512 bytes POIFSConstants.BIG_BLOCK_SIZE

Throws:

java.io.IOException - on I/O errors, and if an insufficient amount of data is read (the InputStream must be an exact multiple of the block size)

Method Detail

eof

public boolean eof()

When we read the data, did we hit end of file?

Returns:

true if the EoF was hit during this block, or false if not. If you have a dodgy short last block, then it's possible to both have data, and also hit EoF...

hasData

public boolean hasData()

Did we actually find any data to read? It's possible, in the event of a short last block, to both have hit the EoF, but also to have data

getData

public byte[] getData()
               throws java.io.IOException

Get the data from the block

Specified by:

getData in interface ListManagedBlock

Returns:

the block's data as a byte array

Throws:

java.io.IOException - if there is no data