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From "Nick Burch (JIRA)" <j...@apache.org>
Subject [jira] Commented: (TIKA-482) Refactor image and jpeg parsers for access to MetadataExtractor API
Date Wed, 29 Sep 2010 15:13:33 GMT

    [ https://issues.apache.org/jira/browse/TIKA-482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12916167#action_12916167
] 

Nick Burch commented on TIKA-482:
---------------------------------

Staffan - do you think this is now stable enough to apply? If so, could you please upload
a patch + tick the license grant box, and I'll review + hopefully commit!

> 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.

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