org.mycore.datamodel.ifs.extractors
Class MCRDataExtractorJPEG

java.lang.Object
  org.mycore.common.events.MCREventHandlerBase
      org.mycore.datamodel.ifs.extractors.MCRDataExtractor
          org.mycore.datamodel.ifs.extractors.MCRDataExtractorJPEG

All Implemented Interfaces:

MCREventHandler

public class MCRDataExtractorJPEG
extends MCRDataExtractor

Extracts EXIF and IPTC metadata from JPEG files. Uses the metadata extraction library from Drew Noakes in the com.drew.** packages. See http://www.drewnoakes.com/code/exif/ for details.

Version:

$Revision: 13085 $ $Date: 2008-02-06 18:27:24 +0100 (Mi, 06 Feb 2008) $

Author:

Frank Lützenkirchen

Constructor Summary

MCRDataExtractorJPEG()

Method Summary

protected void	extractData(Element container, InputStream in) Extracts metadata from a file.
protected String	getSupportedContentTypeIDs() Returns the IDs of the FileContentTypes that are supported by this metadata extractor.
static void	main(String[] args) Test application that outputs extracted metadata for a given local file.

Methods inherited from class org.mycore.datamodel.ifs.extractors.MCRDataExtractor

addDataValue, handleFileCreated, handleFileUpdated, outputData, testLocalFile

Methods inherited from class org.mycore.common.events.MCREventHandlerBase

doHandleEvent, doNothing, handleClassificationCreated, handleClassificationDeleted, handleClassificationRepaired, handleClassificationUpdated, handleDerivateCreated, handleDerivateDeleted, handleDerivateRepaired, handleDerivateUpdated, handleFileDeleted, handleFileRepaired, handleObjectCreated, handleObjectDeleted, handleObjectRepaired, handleObjectUpdated, undoClassificationCreated, undoClassificationDeleted, undoClassificationRepaired, undoClassificationUpdated, undoDerivateCreated, undoDerivateDeleted, undoDerivateRepaired, undoDerivateUpdated, undoFileCreated, undoFileDeleted, undoFileRepaired, undoFileUpdated, undoHandleEvent, undoObjectCreated, undoObjectDeleted, undoObjectRepaired, undoObjectUpdated

Methods inherited from class java.lang.Object

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

Constructor Detail

MCRDataExtractorJPEG

public MCRDataExtractorJPEG()

Method Detail

getSupportedContentTypeIDs

protected String getSupportedContentTypeIDs()

Description copied from class: MCRDataExtractor

Returns the IDs of the FileContentTypes that are supported by this metadata extractor. Only if the given file matches one of these types, metadata is extracted.

Specified by:

getSupportedContentTypeIDs in class MCRDataExtractor

Returns:

a String of supported MCRFileContentType ID(s), separated by spaces

extractData

protected void extractData(Element container,
                           InputStream in)
                    throws com.drew.imaging.jpeg.JpegProcessingException

Description copied from class: MCRDataExtractor

Extracts metadata from a file. This method must be overwritten by subclasses.

Specified by:

extractData in class MCRDataExtractor

Parameters:

container - empty XML element that the extractor should fill with data

in - the InputStream to read the file's content from

Throws:

com.drew.imaging.jpeg.JpegProcessingException

main

public static void main(String[] args)

Test application that outputs extracted metadata for a given local file.

Parameters:

args - the path to a locally stored JPEG file