>>I need to work with (user)models... What else must i serialize to get
it working? <<
sorry that was a dumb question... it was easy to find it out myself ^^
>>Is it possible only to save the most recent records to save some disk
space and to avoid problems with CurrentUserAtoms and
PersistIncrementalBlocks? <<
This is still very important for me. (Now i also dump the CUserAtom, but
if theres a way to skip it, i would appreciate it)
regards
felix
Felix Kalka schrieb:
I played a bit around and tried out three ways to serialize the
records to binary file:
- SlideShow.getMostRecentCoreRecords[i].writeOut(out);
- HSLFSlideShow.getRecords[i].writeOut(out);
- reading the docstream like its done in PPTXMLDump.java
[poifs.createDocumentInputStream("PowerPoint
Document").read(docstream)] then serialize docstream;
After loading the docstream and rebuilding the poifs, i want to create
a new SlideShow.
All three ending in "java.lang.RuntimeException: Creation support for
Current User Atom not complete".
However i can use the poifs.writeFilesystem to pruduce a (tested only
with few ppts) perfect clone. (Not working with
getMostRecentCoreRecords..., rebuild cant be opened...)
Thats how i rebuild the ppt:
fs = new POIFSFileSystem();
fsorg = new POIFSFileSystem(path to org ppt);
fin = new FileInputStream(path to records file);
fs.getRoot().createDocument("PowerPoint Document", fin);
ppt = new SlideShow(new HSLFSlideShow(fs.getRoot, fs));
I need to work with (user)models... What else must i serialize to get
it working?
Is it possible only to save the most recent records to save some disk
space and to avoid problems with CurrentUserAtoms and
PersistIncrementalBlocks?
I want to save the ppt in a db. But i cant just copy all binary data
into the db, i need some more abstract level, and as i didnt get good
results with the (user)models i want to use the record level now to
dump the ppt and then transform the records to models after i loaded
them.
regards
Felix
Felix Kalka schrieb:
I want to serialize the most recent records to some binary file.
Could you give me some information on how i can rebuild the ppt of
the binary data records stream.
I thought that i only save the most recent records due to disk space
and so i dont have to handle with the PersistIncBlock-Stuff. Is this
idea right and do i have all necesary data to rebuild exactly the
same ppt in the most recent recs?
regards,
felix
Yegor Kozlov schrieb:
For example the PPTXMLDump.java from you, Yegor, does it generate a
xml file with all necesary data to rebuild the presentation?
Yes, it generates all necessary data to rebuild the presentation.
Suppose you serialize root records and want to assemble a ppt from
them. A typical structure of records is as follows:
- Document
- MainMaster
- Slide1
- Slide2
...
- Slide N
- PersistIncrementalBlock
- UserEditAtom
The tricky part is PersistIncrementalBlock. For each root record it
maps the record offset and persistId. In its turn, persistId is
referenced in Document.SlideListWithText.SlidePersistAtom. If you
assemble a ppt from slides from different slide shows you need to
make sure Document.SlideListWithText and PersistIncrementalBlock match.
Yegor
regards,
felix
Yegor Kozlov schrieb:
Generally speaking, your rebuilt ppt will always be lossy. You
have to rebuilt the master sheet too but for now masters are
read-only - HSLF can read from master sheets but can't modify them.
There are three important pieces of data to preserve:
(a) Anchor - defines position of a shape in the slide:
Rectangle2D anchor = shape.getAnchor2D();
(b) Text properties, the ones returned by RichTextRun getters.
(c) basic shape properties, aka "Escher" properties.
The code below demonstrates how to copy Escher properties from one
shape to another :
Map<Integer, Integer> shapeProps = new HashMap();
org.apache.poi.hslf.model.Shape srcShape = ....; // source
shape
EscherOptRecord opt =
(EscherOptRecord)srcShape.getEscherChild(srcShape.getSpContainer(),
EscherOptRecord.RECORD_ID);
for (Iterator it = opt.getEscherProperties().iterator();
it.hasNext(); ) {
Object p = it.next();
if(p instanceof EscherSimpleProperty){
EscherSimpleProperty sp = (EscherSimpleProperty)p;
int propId = sp.getId();
int propValue = sp.getPropertyValue();
shapeProps.put(propId, propValue);
} else {
//for simplicity skip complex and array properties
}
}
//rebuilding presentation
org.apache.poi.hslf.model.Shape tgtShape = ...; //target
shape
for (Iterator<Integer> it =
shapeProps.keySet().iterator(); it.hasNext(); ) {
int propId = it.next();
int propValue = shapeProps.get(propId);
tgtShape.setEscherProperty((short)propId, propValue);
}
Regards,
Yegor
Hi all,
i wrote a programm that iterates over all slides of a
presentation and saves all the data of its elements (raw text of
TextBoxes/AutoShapes, binary data of Pictures, etc) in some other
place.
now i want to "rebuild" the presentation with those elements.
So my question is what fields/objects must i save that the
rebuilded presentation looks like the original one?
For now, im just talking about TextBoxes and AutoShapes, but i
dont mind any answer that helps with other Shape-objects too :)
When i save all the fields from my RichTextRun and Shape-objects
i have getter/setter-Methods for (eg. fontname/size, bold,
italic... margin, alignment...) it doesnt look the same.
if i write my original created SlideShow-object out to the
filesystem, it looks like the original presenation... So i think
i just miss to save some fields...
Maybe theres a way to marshal/unmarshal the objects needed to
format the presentation, so i dont have to handle with alot of
fields...
Since i dont know alot about mastersheets and i read that POI
dont know much either, i dont know what can be handled through it...
greetings,
Felix
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