ExifReader (metadata-extractor - Javadoc - Extracts Exif, IPTC, XMP, ICC and other metadata from image files)

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

All Implemented Interfaces:

JpegSegmentMetadataReader
```
public class ExifReader
extends Object
implements JpegSegmentMetadataReader
```
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 https://drewnoakes.com

Field Summary

Fields
Modifier and Type Field and Description

static String JPEG_SEGMENT_PREAMBLE
Exif data stored in JPEG files' APP1 segment are preceded by this six character preamble.

Fields
Modifier and Type	Field and Description
`static String`	`JPEG_SEGMENT_PREAMBLE` Exif data stored in JPEG files' APP1 segment are preceded by this six character preamble.

Constructor Summary

Constructors
Constructor and Description

ExifReader()

Constructors
Constructor and Description
`ExifReader()`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`extract(RandomAccessReader reader, Metadata metadata)` Reads TIFF formatted Exif data from start of the specified `RandomAccessReader`.
`void`	`extract(RandomAccessReader reader, Metadata metadata, int readerOffset)` Reads TIFF formatted Exif data a specified offset within a `RandomAccessReader`.
`void`	`extract(RandomAccessReader reader, Metadata metadata, int readerOffset, Directory parentDirectory)` Reads TIFF formatted Exif data at a specified offset within a `RandomAccessReader`.
`Iterable<JpegSegmentType>`	`getSegmentTypes()` Gets the set of JPEG segment types that this reader is interested in.
`void`	`readJpegSegments(Iterable<byte[]> segments, Metadata metadata, JpegSegmentType segmentType)` Extracts metadata from all instances of a particular JPEG segment type.

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

- Field Detail
  - JPEG_SEGMENT_PREAMBLE
```
public static final String JPEG_SEGMENT_PREAMBLE
```
    Exif data stored in JPEG files' APP1 segment are preceded by this six character preamble.
    
    See Also:
    Constant Field Values
- Constructor Detail
  - ExifReader
```
public ExifReader()
```
- Method Detail
  - getSegmentTypes
```
public Iterable<JpegSegmentType> getSegmentTypes()
```
    Description copied from interface: JpegSegmentMetadataReader
    
    Gets the set of JPEG segment types that this reader is interested in.
    
    Specified by:
    
    getSegmentTypes in interface JpegSegmentMetadataReader
  - readJpegSegments
```
public void readJpegSegments(Iterable<byte[]> segments,
                    Metadata metadata,
                    JpegSegmentType segmentType)
```
    Description copied from interface: JpegSegmentMetadataReader
    
    Extracts metadata from all instances of a particular JPEG segment type.
    
    Specified by:
    
    readJpegSegments in interface JpegSegmentMetadataReader
    
    Parameters:
    segments - A sequence of byte arrays from which the metadata should be extracted. These are in the order encountered in the original file.
    metadata - The Metadata object into which extracted values should be merged.
    segmentType - The JpegSegmentType being read.
  - extract
```
public void extract(RandomAccessReader reader,
           Metadata metadata)
```
    Reads TIFF formatted Exif data from start of the specified RandomAccessReader.
  - extract
```
public void extract(RandomAccessReader reader,
           Metadata metadata,
           int readerOffset)
```
    Reads TIFF formatted Exif data a specified offset within a RandomAccessReader.
  - extract
```
public void extract(RandomAccessReader reader,
           Metadata metadata,
           int readerOffset,
           Directory parentDirectory)
```
    Reads TIFF formatted Exif data at a specified offset within a RandomAccessReader.

Class ExifReader

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

JPEG_SEGMENT_PREAMBLE

Constructor Detail

ExifReader

Method Detail

getSegmentTypes

readJpegSegments

extract

extract

extract