ExifReader (Metadata-Extractor - JavaDoc - An Open Source Java Library for Image File Metadata)

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

Fields
Modifier and Type	Field and Description
`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

Constructors
Constructor and Description

ExifReader()

Constructors
Constructor and Description
`ExifReader()`

Method Summary

Methods
Modifier and Type	Method and Description
`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.

Class ExifReader

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

TAG_EXIF_SUB_IFD_OFFSET

TAG_INTEROP_OFFSET

TAG_GPS_INFO_OFFSET

TAG_MAKER_NOTE_OFFSET

TIFF_HEADER_START_OFFSET

Constructor Detail

ExifReader

Method Detail

extract

extractTiff