[jira] Assigned: (DERBY-1396) ReEncodedInputStream may fail to read all of source Reader.

["Tomohito Nakayama (JIRA)" <de...@db.apache.org>]

     [ http://issues.apache.org/jira/browse/DERBY-1396?page=all ]

Tomohito Nakayama reassigned DERBY-1396:
----------------------------------------

    Assign To: Tomohito Nakayama

>  ReEncodedInputStream may fail to read all of source Reader.
> ------------------------------------------------------------
>
>          Key: DERBY-1396
>          URL: http://issues.apache.org/jira/browse/DERBY-1396
>      Project: Derby
>         Type: Bug

>     Reporter: Tomohito Nakayama
>     Assignee: Tomohito Nakayama

>
> The class org.apache.derby.impl.drda.ReEncodedInputStream seems to have a bug...
> In this class, there exists next code.
>         int count;
> 	if(( count = reader.read(decodedBuffer_, 0, BUFFERED_CHAR_LEN )) < 1 ){
> 	    return null;
> 	}
> In this code, the condition of "<1" was intended to judge whether reader was read entirely.
> However,spec of java api says that reader returns -1 if the end of the reader has been reached and not 0.
> Then "<1" is not appropriate.
> Current code judges 0 as the end of reader.
> Then, if 0 was returned in the meaning that "No character was read now but may continue" as possible in java api, 
> this code will not work correctly...

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