com.twelvemonkeys.imageio.metadata.jpeg
Class JPEGSegmentUtil

java.lang.Object
  com.twelvemonkeys.imageio.metadata.jpeg.JPEGSegmentUtil

public final class JPEGSegmentUtil
extends Object

JPEGSegmentUtil

Version:

$Id: JPEGSegmentUtil.java,v 1.0 24.01.11 17.37 haraldk Exp$

Author:

Harald Kuhr, last modified by $Author: haraldk$

Field Summary

static List<String>	ALL_IDS
static Map<Integer,List<String>>	ALL_SEGMENTS
static Map<Integer,List<String>>	APP_SEGMENTS

Method Summary

static void	main(String[] args)
static List<JPEGSegment>	readSegments(ImageInputStream stream, int marker, String identifier) Reads the requested JPEG segments from the stream.
static List<JPEGSegment>	readSegments(ImageInputStream stream, Map<Integer,List<String>> segmentIdentifiers) Reads the requested JPEG segments from the stream.

Methods inherited from class java.lang.Object

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

Field Detail

ALL_IDS

public static final List<String> ALL_IDS

ALL_SEGMENTS

public static final Map<Integer,List<String>> ALL_SEGMENTS

APP_SEGMENTS

public static final Map<Integer,List<String>> APP_SEGMENTS

Method Detail

readSegments

public static List<JPEGSegment> readSegments(ImageInputStream stream,
                                             int marker,
                                             String identifier)
                                      throws IOException

Reads the requested JPEG segments from the stream. The stream position must be directly before the SOI marker, and only segments for the current image is read.

Parameters:

stream - the stream to read from.

marker - the segment marker to read

identifier - the identifier to read, or null to match any segment

Returns:

a list of segments with the given app marker and optional identifier. If no segments are found, an empty list is returned.

Throws:

IIOException - if a JPEG format exception occurs during reading

IOException - if an I/O exception occurs during reading

readSegments

public static List<JPEGSegment> readSegments(ImageInputStream stream,
                                             Map<Integer,List<String>> segmentIdentifiers)
                                      throws IOException

Reads the requested JPEG segments from the stream. The stream position must be directly before the SOI marker, and only segments for the current image is read.

Parameters:

stream - the stream to read from.

segmentIdentifiers - the segment identifiers

Returns:

a list of segments with the given app markers and optional identifiers. If no segments are found, an empty list is returned.

Throws:

IIOException - if a JPEG format exception occurs during reading

IOException - if an I/O exception occurs during reading

See Also:

ALL_SEGMENTS, APP_SEGMENTS, ALL_IDS

main

public static void main(String[] args)
                 throws IOException

Throws:

IOException