[jira] Updated: (TIKA-482) Refactor image and jpeg parsers for access to MetadataExtractor API

["Staffan Olsson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TIKA-482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Staffan Olsson updated TIKA-482:
--------------------------------

    Attachment: TIKA-451-DublinCore_and_TIKA-482.patch

Was developed as several commits at http://github.com/solsson/tika

> Refactor image and jpeg parsers for access to MetadataExtractor API
> -------------------------------------------------------------------
>
>                 Key: TIKA-482
>                 URL: https://issues.apache.org/jira/browse/TIKA-482
>             Project: Tika
>          Issue Type: Improvement
>          Components: parser
>    Affects Versions: 0.7
>            Reporter: Staffan Olsson
>         Attachments: TIKA-451-DublinCore_and_TIKA-482.patch
>
>
> When I added support for more image metadata in TIKA-472, i realized
> the current design had some restrictions:
>  * I could not access the typed getters from Metadata Extractor, such
> as getDate (to format iso date) and getStringArray (for keywords).
>  * The handler function was called one field at a time which prevents
> logic where one field depends on the value of another (there is for
> example record versions and fields that specify encoding)
> See attached patch. It refactors TiffExtractor to MetadataExtractorExtractor.
> The patch also includes the date fix, see https://issues.apache.org/jira/browse/TIKA-451#action_12898794
> We can later add more Extractors using other libraries, and map to parsers based on format. For example we already use ImageIO in ImageParser so maybe there should be an ImageIOExtractor. To support more image formats we could investigate XMP, for example using http://www.pkg.dk/projects/XMP-Utilities-for-Java-XMPUtil4J/.

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