org.apache.poi.poifs.storage

Class PropertyBlock

java.lang.Object

org.apache.poi.poifs.storage.PropertyBlock

All Implemented Interfaces:

BlockWritable

public final class PropertyBlock
extends java.lang.Object

A block of Property instances

Author:

Marc Johnson (mjohnson at apache dot org)

Field Summary

Fields

Modifier and Type	Field and Description
protected POIFSBigBlockSize	bigBlockSize Either 512 bytes (POIFSConstants.SMALLER_BIG_BLOCK_SIZE) or 4096 bytes (POIFSConstants.LARGER_BIG_BLOCK_SIZE)

Method Summary

Modifier and Type	Method and Description
static BlockWritable[]	createPropertyBlockArray(POIFSBigBlockSize bigBlockSize, java.util.List<Property> properties) Create an array of PropertyBlocks from an array of Property instances, creating empty Property instances to make up any shortfall
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

bigBlockSize

protected POIFSBigBlockSize bigBlockSize

Either 512 bytes (POIFSConstants.SMALLER_BIG_BLOCK_SIZE) or 4096 bytes (POIFSConstants.LARGER_BIG_BLOCK_SIZE)

Method Detail

createPropertyBlockArray

public static BlockWritable[] createPropertyBlockArray(POIFSBigBlockSize bigBlockSize,
                                                       java.util.List<Property> properties)

Create an array of PropertyBlocks from an array of Property instances, creating empty Property instances to make up any shortfall

Parameters:

properties - the Property instances to be converted into PropertyBlocks, in a java List

Returns:

the array of newly created PropertyBlock instances

doWriteData

protected void doWriteData(java.io.OutputStream stream,
                           byte[] data)
                    throws java.io.IOException

Default implementation of write for extending classes that contain their data in a simple array of bytes.

Parameters:

stream - the OutputStream to which the data should be written.

data - the byte array of to be written.

Throws:

java.io.IOException - on problems writing to the specified stream.

writeBlocks

public void writeBlocks(java.io.OutputStream stream)
                 throws java.io.IOException

Write the storage to an OutputStream

Specified by:

writeBlocks in interface BlockWritable

Parameters:

stream - the OutputStream to which the stored data should be written

Throws:

java.io.IOException - on problems writing to the specified stream