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Date: Thu, 6 Nov 2008 04:05:45 -0800 (PST)
From: "Kristian Waagan (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Updated: (DERBY-3935) Introduce interface for a position
 aware stream
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     [ https://issues.apache.org/jira/browse/DERBY-3935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kristian Waagan updated DERBY-3935:
-----------------------------------

    Attachment: derby-3935-1a-PositionedStream.diff

'derby-3935-1a-PositionedStream.diff' is the first revision of the PositionedStream interface.
Two streams implement the interface: PositionedStoreStream and LOBInputStream.

The interface has the following methods:
 - asInputStream() : convenience method to return a reference to the stream as InputStream.
 - getPosition() : returns the current position of the stream.
 - reposition(long) : repositions the stream to the requested position.

Patch ready for review.

> Introduce interface for a position aware stream
> -----------------------------------------------
>
>                 Key: DERBY-3935
>                 URL: https://issues.apache.org/jira/browse/DERBY-3935
>             Project: Derby
>          Issue Type: Sub-task
>          Components: JDBC
>    Affects Versions: 10.5.0.0
>            Reporter: Kristian Waagan
>            Assignee: Kristian Waagan
>            Priority: Minor
>         Attachments: derby-3935-1a-PositionedStream.diff
>
>
> Add an interface for streams that are aware of their position and that can reposition itself on request.
> Initially there will be two such stream objects; PositionedStoreStream and LOBInputStream.
> The interface will be used to allow the Clob implementation (including UTF8Reader) to handle the various internal Clob representations in a consistent manner when it comes to positioning the underlying byte stream.

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