File	Doc	Category	Size	Date	Package
HDGFDiagram.java	API Doc	Apache Poi 3.0.1	6150	Tue Jun 19 20:48:04 BST 2007	org.apache.poi.hdgf

HDGFDiagram

• java.lang.Object

Fields Summary
private static final String	VISIO_HEADER
private POIFSFileSystem	filesystem
private byte[]	_docstream
private short	version
private long	docSize
private Pointer	trailerPointer
private TrailerStream	trailer
private ChunkFactory	chunkFactory
private PointerFactory	ptrFactory

Constructors Summary

public HDGFDiagram(POIFSFileSystem fs) filesystem = fs; DocumentEntry docProps = (DocumentEntry)filesystem.getRoot().getEntry("VisioDocument"); // Grab the document stream _docstream = new byte[docProps.getSize()]; filesystem.createDocumentInputStream("VisioDocument").read(_docstream); // Check it's really visio String typeString = new String(_docstream, 0, 20); if(! typeString.equals(VISIO_HEADER)) { throw new IllegalArgumentException("Wasn't a valid visio document, started with " + typeString); } // Grab the version number, 0x1a -> 0x1b version = LittleEndian.getShort(_docstream, 0x1a); // Grab the document size, 0x1c -> 0x1f docSize = LittleEndian.getUInt(_docstream, 0x1c); // ??? 0x20 -> 0x23 // Create the Chunk+Pointer Factories for the document version ptrFactory = new PointerFactory(version); chunkFactory = new ChunkFactory(version); // Grab the pointer to the trailer trailerPointer = ptrFactory.createPointer(_docstream, 0x24); // Now grab the trailer trailer = (TrailerStream) Stream.createStream(trailerPointer, _docstream, chunkFactory, ptrFactory); // Finally, find all our streams trailer.findChildren(_docstream);

Methods Summary
public void	debug() Prints out some simple debug on the base contents of the file. see org.apache.poi.hdgf.dev.VSDDumper System.err.println("Trailer is at " + trailerPointer.getOffset()); System.err.println("Trailer has type " + trailerPointer.getType()); System.err.println("Trailer has length " + trailerPointer.getLength()); System.err.println("Trailer has format " + trailerPointer.getFormat()); for(int i=0; i<trailer.getPointedToStreams().length; i++) { Stream stream = trailer.getPointedToStreams()[i]; Pointer ptr = stream.getPointer(); System.err.println("Looking at pointer " + i); System.err.println("\tType is " + ptr.getType() + "\t\t" + Integer.toHexString(ptr.getType())); System.err.println("\tOffset is " + ptr.getOffset() + "\t\t" + Long.toHexString(ptr.getOffset())); System.err.println("\tAddress is " + ptr.getAddress() + "\t" + Long.toHexString(ptr.getAddress())); System.err.println("\tLength is " + ptr.getLength() + "\t\t" + Long.toHexString(ptr.getLength())); System.err.println("\tFormat is " + ptr.getFormat() + "\t\t" + Long.toHexString(ptr.getFormat())); System.err.println("\tCompressed is " + ptr.destinationCompressed()); System.err.println("\tStream is " + stream.getClass()); if(stream instanceof PointerContainingStream) { PointerContainingStream pcs = (PointerContainingStream)stream; if(pcs.getPointedToStreams() != null && pcs.getPointedToStreams().length > 0) { System.err.println("\tContains " + pcs.getPointedToStreams().length + " other pointers/streams"); for(int j=0; j<pcs.getPointedToStreams().length; j++) { Stream ss = pcs.getPointedToStreams()[j]; Pointer sptr = ss.getPointer(); System.err.println("\t\t" + j + " - Type is " + sptr.getType() + "\t\t" + Integer.toHexString(sptr.getType())); System.err.println("\t\t" + j + " - Length is " + sptr.getLength() + "\t\t" + Long.toHexString(sptr.getLength())); } } } if(stream instanceof StringsStream) { System.err.println("\t\t**strings**"); StringsStream ss = (StringsStream)stream; System.err.println("\t\t" + ss._getContentsLength()); } }
public long	getDocumentSize() return docSize;
public org.apache.poi.hdgf.streams.Stream[]	getTopLevelStreams() Returns all the top level streams, which are the streams pointed to by the TrailerStream. return trailer.getPointedToStreams();
public org.apache.poi.hdgf.streams.TrailerStream	getTrailerStream() Returns the TrailerStream, which is at the root of the tree of Streams. return trailer;
public static void	main(java.lang.String[] args) For testing only HDGFDiagram hdgf = new HDGFDiagram(new POIFSFileSystem(new FileInputStream(args[0]))); hdgf.debug();