Package com.drew.metadata.jpeg

Class JpegDhtReader

java.lang.Object

com.drew.metadata.jpeg.JpegDhtReader

All Implemented Interfaces:

JpegSegmentMetadataReader

public class JpegDhtReader
extends java.lang.Object
implements JpegSegmentMetadataReader

Reader for JPEG Huffman tables, found in the DHT JPEG segment.

Constructor Summary

Constructors

Constructor	Description
JpegDhtReader()

Method Summary

Modifier and Type	Method	Description
void	extract(SequentialReader reader, Metadata metadata)	Performs the DHT tables extraction, adding found tables to the specified instance of Metadata.
private byte[]	getBytes(SequentialReader reader, int count)
java.lang.Iterable<JpegSegmentType>	getSegmentTypes()	Gets the set of JPEG segment types that this reader is interested in.
void	readJpegSegments(java.lang.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

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

Constructor Detail

JpegDhtReader

public JpegDhtReader()

Method Detail

getSegmentTypes

public java.lang.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(java.lang.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(SequentialReader reader,
                    Metadata metadata)

Performs the DHT tables extraction, adding found tables to the specified instance of Metadata.

getBytes

private byte[] getBytes(SequentialReader reader,
                        int count)
                 throws java.io.IOException

Throws:

java.io.IOException