* @throws IOException If there is an unexpected IOException from the passed
* in OutputStream
*/
public void write(OutputStream out) throws IOException {
// Get a new Filesystem to write into
POIFSFileSystem outFS = new POIFSFileSystem();
// Write out the Property Streams
writeProperties(outFS);
// For position dependent records, hold where they were and now are
// As we go along, update, and hand over, to any Position Dependent
// records we happen across
Hashtable oldToNewPositions = new Hashtable();
// First pass - figure out where all the position dependent
// records are going to end up, in the new scheme
// (Annoyingly, some powerpoing files have PersistPtrHolders
// that reference slides after the PersistPtrHolder)
ByteArrayOutputStream baos = new ByteArrayOutputStream();
for(int i=0; i<_records.length; i++) {
if(_records[i] instanceof PositionDependentRecord) {
PositionDependentRecord pdr = (PositionDependentRecord)_records[i];
int oldPos = pdr.getLastOnDiskOffset();
int newPos = baos.size();
pdr.setLastOnDiskOffset(newPos);
oldToNewPositions.put(new Integer(oldPos),new Integer(newPos));
//System.out.println(oldPos + " -> " + newPos);
}
// Dummy write out, so the position winds on properly
_records[i].writeOut(baos);
}
// No go back through, actually writing ourselves out
baos.reset();
for(int i=0; i<_records.length; i++) {
// For now, we're only handling PositionDependentRecord's that
// happen at the top level.
// In future, we'll need the handle them everywhere, but that's
// a bit trickier
if(_records[i] instanceof PositionDependentRecord) {
// We've already figured out their new location, and
// told them that
// Tell them of the positions of the other records though
PositionDependentRecord pdr = (PositionDependentRecord)_records[i];
pdr.updateOtherRecordReferences(oldToNewPositions);
}
// Whatever happens, write out that record tree
_records[i].writeOut(baos);
}
// Update our cached copy of the bytes that make up the PPT stream
_docstream = baos.toByteArray();
// Write the PPT stream into the POIFS layer
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
outFS.createDocument(bais,"PowerPoint Document");
// Update and write out the Current User atom
int oldLastUserEditAtomPos = (int)currentUser.getCurrentEditOffset();
Integer newLastUserEditAtomPos = (Integer)oldToNewPositions.get(new Integer(oldLastUserEditAtomPos));
if(newLastUserEditAtomPos == null) {
throw new RuntimeException("Couldn't find the new location of the UserEditAtom that used to be at " + oldLastUserEditAtomPos);
}
currentUser.setCurrentEditOffset(newLastUserEditAtomPos.intValue());
currentUser.writeToFS(outFS);
// Write any pictures, into another stream
if (_pictures != null) {
ByteArrayOutputStream pict = new ByteArrayOutputStream();
for (int i = 0; i < _pictures.length; i++ ) {
_pictures[i].write(pict);
}
outFS.createDocument(
new ByteArrayInputStream(pict.toByteArray()), "Pictures"
);
}
// Send the POIFSFileSystem object out to the underlying stream
outFS.writeFilesystem(out);
}