com.twelvemonkeys.imageio.metadata.jpeg

Class JPEGSegmentUtil

java.lang.Object

com.twelvemonkeys.imageio.metadata.jpeg.JPEGSegmentUtil

public final class JPEGSegmentUtil
extends java.lang.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

Fields

Modifier and Type	Field and Description
static java.util.List<java.lang.String>	ALL_IDS
static java.util.Map<java.lang.Integer,java.util.List<java.lang.String>>	ALL_SEGMENTS
static java.util.Map<java.lang.Integer,java.util.List<java.lang.String>>	APP_SEGMENTS

Method Summary

Modifier and Type	Method and Description
static boolean	isKnownJPEGMarker(int marker)
static void	main(java.lang.String[] args)
static java.util.List<JPEGSegment>	readSegments(javax.imageio.stream.ImageInputStream stream, int marker, java.lang.String identifier) Reads the requested JPEG segments from the stream.
static java.util.List<JPEGSegment>	readSegments(javax.imageio.stream.ImageInputStream stream, java.util.Map<java.lang.Integer,java.util.List<java.lang.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 java.util.List<java.lang.String> ALL_IDS

ALL_SEGMENTS

public static final java.util.Map<java.lang.Integer,java.util.List<java.lang.String>> ALL_SEGMENTS

APP_SEGMENTS

public static final java.util.Map<java.lang.Integer,java.util.List<java.lang.String>> APP_SEGMENTS

Method Detail

readSegments

public static java.util.List<JPEGSegment> readSegments(javax.imageio.stream.ImageInputStream stream,
                                                       int marker,
                                                       java.lang.String identifier)
                                                throws java.io.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:

javax.imageio.IIOException - if a JPEG format exception occurs during reading

java.io.IOException - if an I/O exception occurs during reading

readSegments

public static java.util.List<JPEGSegment> readSegments(javax.imageio.stream.ImageInputStream stream,
                                                       java.util.Map<java.lang.Integer,java.util.List<java.lang.String>> segmentIdentifiers)
                                                throws java.io.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:

javax.imageio.IIOException - if a JPEG format exception occurs during reading

java.io.IOException - if an I/O exception occurs during reading

See Also:

ALL_SEGMENTS, APP_SEGMENTS, ALL_IDS

isKnownJPEGMarker

public static boolean isKnownJPEGMarker(int marker)

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Throws:

java.io.IOException