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https://issues.apache.org/jira/browse/DERBY-3936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kristian Waagan updated DERBY-3936:
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Attachment: derby-3936-1a-CharacterStreamDescriptor.diff
'derby-3936-1a-CharacterStreamDescriptor.diff' is the first revision of the
CharacterStreamDescriptor class.
There is no code showing how it will be used yet, but I plan to pass it to
UTF8Reader so that it can properly configure itself.
Patch ready for review.
What you people think of the builder pattern used?
The reasons I tried it are to avoid a constructor with a load of arguments,
avoid having a set of many constructors and a wish to keep the descriptor
object immutable.
> Add CharacterStreamDescriptor
> -----------------------------
>
> Key: DERBY-3936
> URL: https://issues.apache.org/jira/browse/DERBY-3936
> Project: Derby
> Issue Type: Sub-task
> Components: JDBC
> Affects Versions: 10.5.0.0
> Reporter: Kristian Waagan
> Assignee: Kristian Waagan
> Priority: Minor
> Attachments: derby-3936-1a-CharacterStreamDescriptor.diff
>
>
> A set of state information is required about byte streams representing
> characters to be able to handle them properly.
> The basic pieces of information are:
> - is bufferable
> - is position aware
> - data offset
> - current byte position
> - current char position
> - byte length
> - char length
> Additional info:
> - encoding
> - max allowed length
> - bytes per char information
> The information is chosen with UTF8Reader in mind, and the plan is to pass a
> CharacterStreamDescriptor instance to the constructor to allow the reader to
> configure itself appropriately. The information is expected to be valid only
> at a specific point in time, as some of it will change as soon as the reader
> starts working with the underlying stream.
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