[jira] Updated: (LUCENENET-198) CharReader throws NullReferenceException

["Roger Chapman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENENET-198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Roger Chapman updated LUCENENET-198:
------------------------------------

    Attachment: CharReader.patch

> CharReader throws NullReferenceException
> ----------------------------------------
>
>                 Key: LUCENENET-198
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-198
>             Project: Lucene.Net
>          Issue Type: Bug
>         Environment: 2.9.0
>            Reporter: Roger Chapman
>            Priority: Blocker
>         Attachments: CharReader.patch
>
>
> CharReader passes null into the base CharStream Class however CharStream passes reader.BaseStream which causes the Exception.
> Problem is that CharStream inherits  from a StreamReader and the CharReader (which inherits from CharStream)  excepts a TextReader in its constructor.
> My solution was to change CharStream to inherit from TextReader instead. This means that the Methods "MarkSupported", "Mark" and "Reset"  are no longer usable, however I could not find any use of these methods. 
> This effects CharFilter also.

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