com.drew.metadata.exif
Class ExifReader

java.lang.Object
  com.drew.metadata.exif.ExifReader

All Implemented Interfaces:

MetadataReader

public class ExifReader
extends Object
implements MetadataReader

Decodes Exif binary data, populating a Metadata object with tag values in ExifSubIFDDirectory, ExifThumbnailDirectory, ExifInteropDirectory, GpsDirectory and one of the many camera makernote directories.

Author:

Drew Noakes http://drewnoakes.com

Field Summary

static int	TAG_EXIF_SUB_IFD_OFFSET This tag is a pointer to the Exif SubIFD.
static int	TAG_GPS_INFO_OFFSET This tag is a pointer to the Exif GPS IFD.
static int	TAG_INTEROP_OFFSET This tag is a pointer to the Exif Interop IFD.
static int	TAG_MAKER_NOTE_OFFSET This tag is a pointer to the Exif Makernote IFD.
static int	TIFF_HEADER_START_OFFSET

Constructor Summary

ExifReader()

Method Summary

void	extract(BufferReader reader, Metadata metadata) Performs the Exif data extraction, adding found values to the specified instance of Metadata.
void	extractTiff(BufferReader reader, Metadata metadata) Performs the Exif data extraction on a TIFF/RAW, adding found values to the specified instance of Metadata.

Methods inherited from class java.lang.Object

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

Field Detail

TAG_EXIF_SUB_IFD_OFFSET

public static final int TAG_EXIF_SUB_IFD_OFFSET

This tag is a pointer to the Exif SubIFD.

See Also:

Constant Field Values

TAG_INTEROP_OFFSET

public static final int TAG_INTEROP_OFFSET

This tag is a pointer to the Exif Interop IFD.

See Also:

Constant Field Values

TAG_GPS_INFO_OFFSET

public static final int TAG_GPS_INFO_OFFSET

This tag is a pointer to the Exif GPS IFD.

See Also:

Constant Field Values

TAG_MAKER_NOTE_OFFSET

public static final int TAG_MAKER_NOTE_OFFSET

This tag is a pointer to the Exif Makernote IFD.

See Also:

Constant Field Values

TIFF_HEADER_START_OFFSET

public static final int TIFF_HEADER_START_OFFSET

See Also:

Constant Field Values

Constructor Detail

ExifReader

public ExifReader()

Method Detail

extract

public void extract(BufferReader reader,
                    Metadata metadata)

Performs the Exif data extraction, adding found values to the specified instance of Metadata.

Specified by:

extract in interface MetadataReader

Parameters:

reader - The buffer reader from which Exif data should be read.

metadata - The Metadata object into which extracted values should be merged.

extractTiff

public void extractTiff(BufferReader reader,
                        Metadata metadata)

Performs the Exif data extraction on a TIFF/RAW, adding found values to the specified instance of Metadata.

Parameters:

reader - The BufferReader from which TIFF data should be read.

metadata - The Metadata object into which extracted values should be merged.