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From "Andy Seaborne (Closed) (JIRA)" <>
Subject [jira] [Closed] (JENA-198) TSV Output may be invalid but TSV Input reads it fine
Date Thu, 19 Jan 2012 18:10:41 GMT


Andy Seaborne closed JENA-198.

> TSV Output may be invalid but TSV Input reads it fine
> -----------------------------------------------------
>                 Key: JENA-198
>                 URL:
>             Project: Jena
>          Issue Type: Bug
>          Components: ARQ
>    Affects Versions: ARQ 2.9.1
>         Environment: Any
>            Reporter: Rob Vesse
>            Assignee: Andy Seaborne
>            Priority: Minor
>              Labels: tsv
>             Fix For: ARQ 2.9.1
>         Attachments: TSVIllegalIOTests.patch, TSVIllegalInput.patch, TSVIllegalOutput.patch
> I noticed today that TSVOutput may produce output that contains prefixed names which
is invalid per my reading of the relevant specification -
> This is due to the fact that TSVOutput called FmtUtils.stringForNode() with only a Node
resulting in it using the ARQ default prefix mapping for output.
> Attached is a simple patch which fixes the issue, it should also speed up TSVOutput marginally
as the existing code requires a SerializationContext to be created for every term serialized
and incurs the cost of trying to turn URIs into prefixed names.  Essentially the patch creates
a null SerializationContext variable and just passes that to every call to FmtUtils.stringForNode()
so that the ARQ default prefix mapping never gets used.
> The second part of the issue is that this malformed TSV input may be accepted because
TSVInputIterator uses NodeFactory.parseNode() to parse terms which calls SSE.parseNode() without
any prefix mapping and thus internally ends up using the default SSE prefix mapping which
means some prefixed names get permitted as valid when they should be rejected.
> The second patch attached fixes this part of the issue by keeping an empty static prefix
map and calling SSE.parseNode() directly and passing in this map.

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