Package com.drew.metadata.exif

Class ExifTiffHandler

java.lang.Object

com.drew.metadata.tiff.DirectoryTiffHandler

com.drew.metadata.exif.ExifTiffHandler

All Implemented Interfaces:

TiffHandler

Direct Known Subclasses:

PhotoshopTiffHandler

public class ExifTiffHandler
extends DirectoryTiffHandler

Implementation of TiffHandler used for handling TIFF tags according to the Exif standard.

Includes support for camera manufacturer makernotes.

Field Summary

Fields inherited from class com.drew.metadata.tiff.DirectoryTiffHandler

_currentDirectory, _metadata

Constructor Summary

Constructors

Constructor	Description
ExifTiffHandler(Metadata metadata, Directory parentDirectory)

Method Summary

Modifier and Type	Method	Description
boolean	customProcessTag(int tagOffset, Set<Integer> processedIfdOffsets, int tiffHeaderOffset, RandomAccessReader reader, int tagId, int byteCount)
private static String	getReaderString(RandomAccessReader reader, int makernoteOffset, int bytesRequested)	Read a given number of bytes from the stream This method is employed to "suppress" attempts to read beyond end of the file as may happen at the beginning of processMakernote when we read increasingly longer camera makes.
private static boolean	handlePrintIM(Directory directory, int tagId)
boolean	hasFollowerIfd()
private static void	processBinary(Directory directory, int tagValueOffset, RandomAccessReader reader, int byteCount, Boolean isSigned, int arrayLength)
private static void	processKodakMakernote(KodakMakernoteDirectory directory, int tagValueOffset, RandomAccessReader reader)
private boolean	processMakernote(int makernoteOffset, Set<Integer> processedIfdOffsets, int tiffHeaderOffset, RandomAccessReader reader)
private static void	processPrintIM(PrintIMDirectory directory, int tagValueOffset, RandomAccessReader reader, int byteCount)	Process PrintIM IFD Converted from Exiftool version 10.33 created by Phil Harvey http://www.sno.phy.queensu.ca/~phil/exiftool/ lib\Image\ExifTool\PrintIM.pm
private static void	processReconyxHyperFire2Makernote(ReconyxHyperFire2MakernoteDirectory directory, int makernoteOffset, RandomAccessReader reader)
private static void	processReconyxHyperFireMakernote(ReconyxHyperFireMakernoteDirectory directory, int makernoteOffset, RandomAccessReader reader)
private static void	processReconyxUltraFireMakernote(ReconyxUltraFireMakernoteDirectory directory, int makernoteOffset, RandomAccessReader reader)
void	setTiffMarker(int marker)	Receives the 2-byte marker found in the TIFF header.
Long	tryCustomProcessFormat(int tagId, int formatCode, long componentCount)
boolean	tryEnterSubIfd(int tagId)

Methods inherited from class com.drew.metadata.tiff.DirectoryTiffHandler

endingIFD, error, pushDirectory, setByteArray, setDouble, setDoubleArray, setFloat, setFloatArray, setInt16s, setInt16sArray, setInt16u, setInt16uArray, setInt32s, setInt32sArray, setInt32u, setInt32uArray, setInt8s, setInt8sArray, setInt8u, setInt8uArray, setRational, setRationalArray, setString, warn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ExifTiffHandler

public ExifTiffHandler(Metadata metadata,
 Directory parentDirectory)

Method Details

setTiffMarker

public void setTiffMarker(int marker)
                   throws TiffProcessingException

Description copied from interface: TiffHandler

Receives the 2-byte marker found in the TIFF header.

Implementations are not obligated to use this information for any purpose, though it may be useful for validation or perhaps differentiating the type of mapping to use for observed tags and IFDs.

Parameters:

marker - the 2-byte value found at position 2 of the TIFF header

Throws:

TiffProcessingException

tryEnterSubIfd

public boolean tryEnterSubIfd(int tagId)

hasFollowerIfd

public boolean hasFollowerIfd()

tryCustomProcessFormat

public Long tryCustomProcessFormat(int tagId,
 int formatCode,
 long componentCount)

customProcessTag

public boolean customProcessTag(int tagOffset,
 Set<Integer> processedIfdOffsets,
 int tiffHeaderOffset,
 RandomAccessReader reader,
 int tagId,
 int byteCount)
                         throws IOException

Throws:

IOException

processBinary

private static void processBinary(Directory directory,
 int tagValueOffset,
 RandomAccessReader reader,
 int byteCount,
 Boolean isSigned,
 int arrayLength)
                           throws IOException

Throws:

IOException

getReaderString

private static String getReaderString(RandomAccessReader reader,
 int makernoteOffset,
 int bytesRequested)
                               throws IOException

Read a given number of bytes from the stream This method is employed to "suppress" attempts to read beyond end of the file as may happen at the beginning of processMakernote when we read increasingly longer camera makes. Instead of failing altogether in this context we return an empty string which will fail all sensible attempts to compare to makes while avoiding a full-on failure.

Throws:

IOException

processMakernote

private boolean processMakernote(int makernoteOffset,
 Set<Integer> processedIfdOffsets,
 int tiffHeaderOffset,
 RandomAccessReader reader)
                          throws IOException

Throws:

IOException

handlePrintIM

private static boolean handlePrintIM(Directory directory,
 int tagId)

processPrintIM

private static void processPrintIM(PrintIMDirectory directory,
 int tagValueOffset,
 RandomAccessReader reader,
 int byteCount)
                            throws IOException

Process PrintIM IFD Converted from Exiftool version 10.33 created by Phil Harvey http://www.sno.phy.queensu.ca/~phil/exiftool/ lib\Image\ExifTool\PrintIM.pm

Throws:

IOException

processKodakMakernote

private static void processKodakMakernote(KodakMakernoteDirectory directory,
 int tagValueOffset,
 RandomAccessReader reader)

processReconyxHyperFireMakernote

private static void processReconyxHyperFireMakernote(ReconyxHyperFireMakernoteDirectory directory,
 int makernoteOffset,
 RandomAccessReader reader)
                                              throws IOException

Throws:

IOException

processReconyxHyperFire2Makernote

private static void processReconyxHyperFire2Makernote(ReconyxHyperFire2MakernoteDirectory directory,
 int makernoteOffset,
 RandomAccessReader reader)
                                               throws IOException

Throws:

IOException

processReconyxUltraFireMakernote

private static void processReconyxUltraFireMakernote(ReconyxUltraFireMakernoteDirectory directory,
 int makernoteOffset,
 RandomAccessReader reader)
                                              throws IOException

Throws:

IOException