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From "Peter Ansell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ANY23-83) Remove hardcoded formats throughout Any23 to make it useful as a library
Date Fri, 01 Jun 2012 04:28:23 GMT

    [ https://issues.apache.org/jira/browse/ANY23-83?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13287145#comment-13287145
] 

Peter Ansell commented on ANY23-83:
-----------------------------------

I rebased my git repository onto a copy of the current trunk to check how many patches I still
had in this area and noticed that RDFSchemaUtils still hardcodes the supported formats. I
may not be seeing the significance of VocabularyFormat currently, but I assume that it could
be generalised to any RDFFormat.

Is it related to the ability to type in a human readable alias for the format in VocabPrinter?
If so, have you tried using RDFFormat.valueOf(String) in the converter inside VocabPrinter
which matches against registered formats using:

    format.getName().equalsIgnoreCase(formatName)

These names may not exactly match the historical names for each format that were previously
used, but they are extensible at runtime so it makes RDFSchemaUtils easier to maintain. This
may also help with ANY23-3 as N3 would be available, although it would just be the Turtle
subset in practice as we only hold RDF triples in memory.
                
> Remove hardcoded formats throughout Any23 to make it useful as a library
> ------------------------------------------------------------------------
>
>                 Key: ANY23-83
>                 URL: https://issues.apache.org/jira/browse/ANY23-83
>             Project: Apache Any23
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 0.7.0
>            Reporter: Peter Ansell
>            Assignee: Michele Mostarda
>             Fix For: 0.7.0
>
>         Attachments: any23-rdfwritertriplehandler.diff, any23-rio-naive-mime-detector.diff
>
>
> Many classes inside of Any23 seem to hardcode restrictions on the supported formats,
making it difficult to utilise Any23 as an extensible library. 
> One example of this are RDFSchemaUtils that artificially restricts itself to three formats
using an enum mapping, where it could easily accept any RDFHandler, even if it were not an
RDFWriter. 
> Another example is RDFUtils where the list of RDFParser's is hardcoded in, and enforced
using an enum.
> What was the reasoning for creating artificial format classes and manually mapping them
to writers/parsers instead of using either allowing any RDFHandler in the first case, or allowing
any accessible RDFParser in the second case, using Rio.getParser() to avoid hardcoding anything.

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