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https://issues.apache.org/jira/browse/LUCENE-547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12986490#action_12986490
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Andre Schild commented on LUCENE-547:
-------------------------------------

The problem with RAMDirectory is, that it uses java.io.File

When you work in a applet environment, then you don't have explicit 
java.io.File objects (for security reasons)
but instead you have to use the java.net.URL to get access to the "files".

So inheriting from RAMDirectory won't do.

But you can leave it closed, as I have a working implementation, and since
noby seems to have the need for that in over 5 years....

Thanks anyway for your work.

> Directory implementation for Applets
> ------------------------------------
>
>                 Key: LUCENE-547
>                 URL: https://issues.apache.org/jira/browse/LUCENE-547
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Store
>    Affects Versions: 1.9
>         Environment: Applets
>            Reporter: Andre Schild
>            Priority: Minor
>         Attachments: AppletDirectory.zip
>
>
> This directory implementation can be used inside of applets, where the index 
> files are located on the server.
> Also teh applet is not required to be signed, as no calls to the 
> System.getProperty are made.

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