PropertyBlock (POI API Documentation)

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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
extends java.lang.Object

A block of Property instances

Author:: Marc Johnson (mjohnson at apache dot org)

Field Summary
`protected POIFSBigBlockSize`	`bigBlockSize` Either 512 bytes (`POIFSConstants.SMALLER_BIG_BLOCK_SIZE`) or 4096 bytes (`POIFSConstants.LARGER_BIG_BLOCK_SIZE`)

Method Summary
`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