org.apache.poi.hslf.record

Class PersistPtrHolder

java.lang.Object

org.apache.poi.hslf.record.Record

org.apache.poi.hslf.record.RecordAtom

org.apache.poi.hslf.record.PositionDependentRecordAtom

org.apache.poi.hslf.record.PersistPtrHolder

All Implemented Interfaces:

PositionDependentRecord

public final class PersistPtrHolder
extends PositionDependentRecordAtom

General holder for PersistPtrFullBlock and PersistPtrIncrementalBlock records. We need to handle them specially, since we have to go around updating UserEditAtoms if they shuffle about on disk These hold references to where slides "live". If the position of a slide moves, then we have update all of these. If we come up with a new version of a slide, then we have to add one of these to the end of the chain (via CurrentUserAtom and UserEditAtom) pointing to the new slide location

Author:

Nick Burch

Field Summary

Fields inherited from class org.apache.poi.hslf.record.PositionDependentRecordAtom

myLastOnDiskOffset

Fields inherited from class org.apache.poi.hslf.record.Record

logger

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	PersistPtrHolder(byte[] source, int start, int len) Create a new holder for a PersistPtr record

Method Summary

Methods

Modifier and Type	Method and Description
void	addSlideLookup(int slideID, int posOnDisk) Adds a new slide, notes or similar, to be looked up by this.
int[]	getKnownSlideIDs() Get the list of slides that this PersistPtrHolder knows about.
long	getRecordType() Return the value we were given at creation, be it 6001 or 6002
Hashtable<Integer,Integer>	getSlideLocationsLookup() Get the lookup from slide numbers to byte offsets, for the slides known about by this PersistPtrHolder.
Hashtable<Integer,Integer>	getSlideOffsetDataLocationsLookup() Get the lookup from slide numbers to their offsets inside _ptrData, used when adding or moving slides.
void	updateOtherRecordReferences(Hashtable<Integer,Integer> oldToNewReferencesLookup) At write-out time, update the references to the sheets to their new positions
void	writeOut(OutputStream out) Write the contents of the record back, so it can be written to disk

Methods inherited from class org.apache.poi.hslf.record.PositionDependentRecordAtom

getLastOnDiskOffset, setLastOnDiskOffset

Methods inherited from class org.apache.poi.hslf.record.RecordAtom

getChildRecords, isAnAtom

Methods inherited from class org.apache.poi.hslf.record.Record

buildRecordAtOffset, createRecordForType, findChildRecords, writeLittleEndian, writeLittleEndian

Methods inherited from class java.lang.Object

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

Constructor Detail

PersistPtrHolder

protected PersistPtrHolder(byte[] source,
                int start,
                int len)

Create a new holder for a PersistPtr record

Method Detail

getKnownSlideIDs

public int[] getKnownSlideIDs()

Get the list of slides that this PersistPtrHolder knows about. (They will be the keys in the hashtable for looking up the positions of these slides)

getSlideLocationsLookup

public Hashtable<Integer,Integer> getSlideLocationsLookup()

Get the lookup from slide numbers to byte offsets, for the slides known about by this PersistPtrHolder.

getSlideOffsetDataLocationsLookup

public Hashtable<Integer,Integer> getSlideOffsetDataLocationsLookup()

Get the lookup from slide numbers to their offsets inside _ptrData, used when adding or moving slides.

addSlideLookup

public void addSlideLookup(int slideID,
                  int posOnDisk)

Adds a new slide, notes or similar, to be looked up by this. For now, won't look for the most optimal on disk representation.

getRecordType

public long getRecordType()

Return the value we were given at creation, be it 6001 or 6002

Specified by:

getRecordType in class Record

updateOtherRecordReferences

public void updateOtherRecordReferences(Hashtable<Integer,Integer> oldToNewReferencesLookup)

At write-out time, update the references to the sheets to their new positions

Specified by:

updateOtherRecordReferences in interface PositionDependentRecord

Specified by:

updateOtherRecordReferences in class PositionDependentRecordAtom

writeOut

public void writeOut(OutputStream out)
              throws IOException

Write the contents of the record back, so it can be written to disk

Specified by:

writeOut in class Record

Throws:

IOException