com.drew.metadata.jpeg

Class JpegReader

java.lang.Object

com.drew.metadata.jpeg.JpegReader

All Implemented Interfaces:

JpegSegmentMetadataReader

public class JpegReader
extends Object
implements JpegSegmentMetadataReader

Decodes JPEG SOFn data, populating a Metadata object with tag values in a JpegDirectory.

Constructor Summary

Constructors

Constructor and Description
JpegReader()

Method Summary

Modifier and Type	Method and Description
void	extract(byte[] segmentBytes, Metadata metadata, JpegSegmentType segmentType)
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

Constructor Detail

JpegReader

public JpegReader()

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(byte[] segmentBytes,
                    Metadata metadata,
                    JpegSegmentType segmentType)