edu.harvard.hul.ois.jhove.module.jpeg
Class SpiffDir
java.lang.Object
   edu.harvard.hul.ois.jhove.module.jpeg.SpiffDir
edu.harvard.hul.ois.jhove.module.jpeg.SpiffDir
- public class SpiffDir 
- extends java.lang.Object
This class represents a SPIFF directory and the tags defined under
 it.  A SPIFF directory consists of one or more APP8 segments, and
 may define ancillary images. It is always contained within the
 primary image stream.
- Author:
- Gary McGath
 
| Method Summary | 
|  void | appendThumbnailProps(java.util.List imageList)Appends any thumbnail properties that have been collected to
 the provided list.
 | 
|  void | readDirEntry(java.io.DataInputStream dstream,
             int length)Reads a directory entry, starting at the position after
 the APP8 marker and length.
 | 
 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
 
SpiffDir
public SpiffDir(JpegModule module)
readDirEntry
public void readDirEntry(java.io.DataInputStream dstream,
                         int length)
                  throws java.io.IOException
- Reads a directory entry, starting at the position after
 the APP8 marker and length.  If the entry is for a thumbnail, create
 a Property for that thumbnail and add it to the thumbnail
 list.  Other tags provide interesting information, some of
 which should go into properties, but for the moment we
 just handle the thumbnail and ignore other tags.
 
 An APP8 segment which is in a SPIFF file, and isn't the
 first APP8 segment (file header), is presumed to be a
 directory entry.  These directory entries are a little
 inconvenient, because they can contain offsets to data in
 what we otherwise handle as a stream format. The offsets
 can be either to data within the block, or to faraway
 indirect data blocks.  For the present version, we ignore
 offset data, which seems to be used only for the actual
 image bits (e.g., TNDATA).
 
- 
- Throws:
- java.io.IOException
 
appendThumbnailProps
public void appendThumbnailProps(java.util.List imageList)
- Appends any thumbnail properties that have been collected to
 the provided list.
 
-