FileDocCategorySizeDatePackage
UserEditAndPersistListing.javaAPI DocApache Poi 3.0.14863Mon Jan 01 18:55:34 GMT 2007org.apache.poi.hslf.dev

UserEditAndPersistListing

public class UserEditAndPersistListing extends Object
Uses record level code to locate UserEditAtom records, and other persistence related atoms. Tries to match them together, to help illuminate quite what all the offsets mean

Fields Summary
private static byte[]
fileContents
Constructors Summary
Methods Summary
public static org.apache.poi.hslf.record.RecordfindRecordAtPos(int pos)

		long type = LittleEndian.getUShort(fileContents, pos+2);
		long rlen = LittleEndian.getUInt(fileContents, pos+4);

		Record r = Record.createRecordForType(type,fileContents,pos,(int)rlen+8);
		
		return r;
public static voidmain(java.lang.String[] args)

		if(args.length < 1) {
			System.err.println("Need to give a filename");
			System.exit(1);
		}


		// Create the slideshow object, for normal working with
		HSLFSlideShow ss = new HSLFSlideShow(args[0]);
		fileContents = ss.getUnderlyingBytes();
		System.out.println("");

		// Find any persist ones first
		Record[] records = ss.getRecords();
		int pos = 0;
		for(int i=0; i<records.length; i++) {
			Record r = records[i];

			if(r.getRecordType() == 6001l) {
				// PersistPtrFullBlock
				System.out.println("Found PersistPtrFullBlock at " + pos + " (" + Integer.toHexString(pos) + ")");
			}
			if(r.getRecordType() == 6002l) {
				// PersistPtrIncrementalBlock
				System.out.println("Found PersistPtrIncrementalBlock at " + pos + " (" + Integer.toHexString(pos) + ")");
				PersistPtrHolder pph = (PersistPtrHolder)r;

				// Check the sheet offsets
				int[] sheetIDs = pph.getKnownSlideIDs();
				Hashtable sheetOffsets = pph.getSlideLocationsLookup();
				for(int j=0; j<sheetIDs.length; j++) {
					Integer id = new Integer(sheetIDs[j]);
					Integer offset = (Integer)sheetOffsets.get(id);

					System.out.println("  Knows about sheet " + id);
					System.out.println("    That sheet lives at " + offset);

					Record atPos = findRecordAtPos(offset.intValue());
					System.out.println("    The record at that pos is of type " + atPos.getRecordType());
					System.out.println("    The record at that pos has class " + atPos.getClass().getName());

					if(! (atPos instanceof PositionDependentRecord)) {
						System.out.println("    ** The record class isn't position aware! **");
					}
				}
			}

			// Increase the position by the on disk size
			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			r.writeOut(baos);
			pos += baos.size();
		}

		System.out.println("");

		pos = 0;
		// Now look for UserEditAtoms
		for(int i=0; i<records.length; i++) {
			Record r = records[i];

			if(r instanceof UserEditAtom) {
				UserEditAtom uea = (UserEditAtom)r;
				System.out.println("Found UserEditAtom at " + pos + " (" + Integer.toHexString(pos) + ")");
				System.out.println("  lastUserEditAtomOffset = " + uea.getLastUserEditAtomOffset() );
				System.out.println("  persistPointersOffset  = " + uea.getPersistPointersOffset() );
				System.out.println("  docPersistRef          = " + uea.getDocPersistRef() );
				System.out.println("  maxPersistWritten      = " + uea.getMaxPersistWritten() );
			}

			// Increase the position by the on disk size
			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			r.writeOut(baos);
			pos += baos.size();
		}

		System.out.println("");


		// Query the CurrentUserAtom
		CurrentUserAtom cua = ss.getCurrentUserAtom();
		System.out.println("Checking Current User Atom");
		System.out.println("  Thinks the CurrentEditOffset is " + cua.getCurrentEditOffset());
		
		System.out.println("");