JpegDhtReader

java.lang.Object

com.drew.metadata.jpeg.JpegDhtReader

All Implemented Interfaces:: JpegSegmentMetadataReader

public class JpegDhtReader extends 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)

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

Constructor Details
- JpegDhtReader
  
  public JpegDhtReader()
Method Details
- 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(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 IOException
  
  Throws:
  
  IOException