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## edu.harvard.hul.ois.jhove.module
Class TiffModule

    java.lang.Object
      edu.harvard.hul.ois.jhove.ModuleBase
          edu.harvard.hul.ois.jhove.module.TiffModule

All Implemented Interfaces:
  Module

    public class TiffModule

extends ModuleBase

Module for identification and validation of TIFF files.

Field Summary
`protected boolean` | `_byteOffsetIsValid`
`protected boolean` | `_dngRawFlag` Special flag for DNG profiles; is raw IFD profile satisfied
`protected boolean` | `_dngThumbnailFlag` Special flag for DNG profiles; is "thumbnail" (IFD 0) profile satisfied
`protected boolean` | `_exifFirstFlag` Special flag for Exif profiles: Is main IFD profile satisfied
`protected boolean` | `_exifThumbnailFlag` Special flag for Exif profiles: Is thumbnail IFD profile satisfied
`protected java.util.logging.Logger` | `_logger` Logger for this class.
`protected java.util.List<TiffProfile>` | `_profile` List of profile checkers.
`protected java.io.RandomAccessFile` | `_raf` Open TIFF file.
`protected int` | `_version` TIFF version.
`static java.lang.String[]` | `defaultConfigParams` Value to write as module params to the default config file.

Fields inherited from class edu.harvard.hul.ois.jhove.ModuleBase
`_app, _bigEndian, _checksumFinished, _countStream, _coverage, _crc32, _date, _defaultParams, _features, _format, _init, _isRandomAccess, _je, _md5, _mimeType, _name, _nByte, _note, _param, _release, _repInfoNote, _rights, _sha1, _signature, _specification, _validityNote, _vendor, _verbosity, _wellFormedNote`

Fields inherited from interface edu.harvard.hul.ois.jhove.Module
`MAXIMUM_VERBOSITY, MINIMUM_VERBOSITY`

Constructor Summary
`TiffModule()` Instantiate a `TiffModule` object.

Method Summary
`protected void` | `buildProfileList()` Build list of profiles to check.
`protected void` | `checkValidity(java.util.List<IFD> ifds, RepInfo info)` Go through all the IFD's, calling checkIFDValidity on each one that is a standard IFD.
`protected void` | `checkValidity(TiffIFD ifd, RepInfo info)` Check the validity of the IFD.
`java.util.List<IFD>` | `exifParse(java.io.RandomAccessFile raf, RepInfo info)` Special-purpose, limited parser for embedded Exif files.
`protected void` | `initParse()` Initializes the state of the module for parsing.
`void` | `parse(java.io.RandomAccessFile raf, RepInfo info)` Parse the TIFF for well-formedness and validity, accumulating representation information.
`protected IFD` | `parseIFDChain(long next, RepInfo info, int type, java.util.List<IFD> list, boolean suppressErrors)`
`protected java.util.List<IFD>` | `parseIFDs(long offset, RepInfo info)` Parse all IFDs in the file, accumulating representation information.
`protected java.util.List<IFD>` | `parseIFDs(long offset, RepInfo info, boolean suppressErrors, int ifdType)` Parse all IFDs in the file, accumulating representation information.
`protected void` | `reportInvalid(java.lang.String s, RepInfo info)` Report an instance of invalidity.
`protected int` | `selectMimeTypeIndex()` Return the index into _mimeType which should be used for the MIME type property.
`void` | `setByteOffsetValid(boolean v)` Allow odd offsets in values

Methods inherited from class edu.harvard.hul.ois.jhove.ModuleBase
`addIntegerProperty, addIntegerProperty, applyDefaultParams, calcRAChecksum, checkSignatures, checkSignatures, getApp, getBase, getBufferedDataStream, getCoverage, getCRC32, getDate, getDefaultParams, getFeatures, getFormat, getMimeType, getName, getNByte, getNote, getRelease, getRepInfoNote, getRights, getSignature, getSpecification, getValidityNote, getVendor, getWellFormedNote, hasFeature, init, initFeatures, isBigEndian, isRandomAccess, param, parse, readByteBuf, readDouble, readDouble, readDouble, readFloat, readFloat, readSignedByte, readSignedByte, readSignedByte, readSignedInt, readSignedInt, readSignedInt, readSignedLong, readSignedRational, readSignedRational, readSignedShort, readSignedShort, readSignedShort, readUnsignedByte, readUnsignedByte, readUnsignedByte, readUnsignedInt, readUnsignedInt, readUnsignedInt, readUnsignedRational, readUnsignedRational, readUnsignedRational, readUnsignedShort, readUnsignedShort, readUnsignedShort, resetParams, setApp, setBase, setChecksums, setCRC32, setDefaultParams, setMD5, setNByte, setSHA1, setValidityNote, setVerbosity, show, skipBytes, skipBytes, vectorToPropArray`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### defaultConfigParams

    public static final java.lang.String[] defaultConfigParams

  Value to write as module params to the default config file.

### _logger

    protected java.util.logging.Logger _logger

  Logger for this class.

### _profile

    protected java.util.List<TiffProfile> _profile

  List of profile checkers.

### _exifFirstFlag

    protected boolean _exifFirstFlag

  Special flag for Exif profiles: Is main IFD profile satisfied

### _exifThumbnailFlag

    protected boolean _exifThumbnailFlag

  Special flag for Exif profiles: Is thumbnail IFD profile satisfied

### _dngThumbnailFlag

    protected boolean _dngThumbnailFlag

  Special flag for DNG profiles; is "thumbnail" (IFD 0) profile satisfied

### _dngRawFlag

    protected boolean _dngRawFlag

  Special flag for DNG profiles; is raw IFD profile satisfied

### _raf

    protected java.io.RandomAccessFile _raf

  Open TIFF file.

### _version

    protected int _version

  TIFF version.

### _byteOffsetIsValid

    protected boolean _byteOffsetIsValid

Constructor Detail

### TiffModule

    public TiffModule()

  Instantiate a `TiffModule` object.

Method Detail

### parse

    public final void parse(java.io.RandomAccessFile raf,
                            RepInfo info)
                     throws java.io.IOException

  Parse the TIFF for well-formedness and validity, accumulating representation information.

  Specified by:
    `parse` in interface `Module`
  Overrides:
    `parse` in class `ModuleBase`
  Parameters:
    `raf` - Open TIFF file
    `info` - Representation informatino
  Throws:
    `java.io.IOException`

### setByteOffsetValid

    public void setByteOffsetValid(boolean v)

  Allow odd offsets in values

### exifParse

    public final java.util.List<IFD> exifParse(java.io.RandomAccessFile raf,
                                               RepInfo info)
                                        throws java.io.IOException

  Special-purpose, limited parser for embedded Exif files.

  Parameters:
    `raf` - Open TIFF file
    `info` - Representation informatino
  Throws:
    `java.io.IOException`

### buildProfileList

    protected void buildProfileList()

  Build list of profiles to check. Profile checking is, for the most part, done per IFD rather than per file. Exif profile checking is an exception, since it requires the coordination of multiple IFD's. Hence, the Exif profiles aren't added to the list, but treated elsewhere.

### checkValidity

    protected void checkValidity(java.util.List<IFD> ifds,
                                 RepInfo info)

  Go through all the IFD's, calling checkIFDValidity on each one that is a standard IFD. (Private IFD's have different requirements, and for the moment aren't checked here.) If any of them are invalid, set info's valid field to false. Validity problems are non-fatal, and more information is better, so we keep going with all IFDs even if we find problems.

### checkValidity

    protected void checkValidity(TiffIFD ifd,
                                 RepInfo info)
                          throws TiffException

  Check the validity of the IFD.

  Parameters:
    `ifd` - IFD
  Throws:
    `TiffException`

### reportInvalid

    protected void reportInvalid(java.lang.String s,
                                 RepInfo info)

  Report an instance of invalidity.

### parseIFDs

    protected java.util.List<IFD> parseIFDs(long offset,
                                            RepInfo info)
                                     throws TiffException

  Parse all IFDs in the file, accumulating representation information.

  Parameters:
    `offset` - Starting byte offset
    `info` - Representation information
  Throws:
    `TiffException`

### parseIFDs

    protected java.util.List<IFD> parseIFDs(long offset,
                                            RepInfo info,
                                            boolean suppressErrors,
                                            int ifdType)
                                     throws TiffException

  Parse all IFDs in the file, accumulating representation information.

  Parameters:
    `offset` - Starting byte offset
    `info` - Representation information
    `suppressErrors` - If true, use IFD even if it has errors
  Throws:
    `TiffException`

### parseIFDChain

    protected IFD parseIFDChain(long next,
                                RepInfo info,
                                int type,
                                java.util.List<IFD> list,
                                boolean suppressErrors)
                         throws TiffException

  Throws:
    `TiffException`

### initParse

    protected void initParse()

  Initializes the state of the module for parsing. This overrides the superclass method to reset all the profile flags.

  Overrides:
    `initParse` in class `ModuleBase`

### selectMimeTypeIndex

    protected int selectMimeTypeIndex()

  Return the index into _mimeType which should be used for the MIME type property. This must be called after all the profiles have been checked. An index of 0 is dominant; if any profiles return 0 from their getMimeClass method, or if conflicting values are returned by different satisfied profiles, then we return 0.

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