Re: [Openjnlp-devel] Tweak to AppletRunner.java

[Jeff A. <je...@wo...>]

At 11:37 AM -0400 5/17/02, Scott Kovatch wrote:
>On Thursday, May 16, 2002, at 10:13  PM, Kevin Herrboldt wrote:
>
>>On Tuesday, May 14, 2002, at 08:22 , Scott Kovatch wrote:
>>
>>>That's fine -- those additional methods are only used by the Java 
>>>Plugin on 1.4 -- AppletRunner would only need those to satisfy the 
>>>interface and nothing else.
>>
>>I went ahead and implemented the methods to actually do stuff, 
>>since it was pretty straightforward using collections.
>>
>>Do you know how these methods are used or what Sun's intention is? 
>>Seems odd Sun would add these to the AppletContext interface just 
>>for the Java Plugin. Now they're exposed to the applet itself 
>>through Applet.getAppletContext, so I can see applet writers using 
>>them.
>
>They're related to JavaBeans -- I believe there's a feature of the 
>plugin that allows you to wrap a Java Bean as an ActiveX control, so 
>there's a pile of code that treats JavaBeans like applets.  As a 
>security measure you don't want components reading from or writing 
>to each others streams, so this is how they keep them separate.
>
>That's a 10-minute reading-of-the-code analysis, so I may be wrong. 
>But, you're implementation sounds like it matches what's in the 
>plugin.  I doubt it will ever get used, though.
>
>Scott
>
>_____________________
>Scott Kovatch
>Java Runtime Classes
>Apple Computer
>Cleveland Hts, OH
>sko...@ap...
>

Actually, there is some documentation on what they can be used for by applets
that want to basically persist anything longer than a single session, 
and some sample code at:

http://java.sun.com/j2se/1.4/docs/guide/plugin/developer_guide/persistence.html

more useful is section 4.2 (page 24) of:

http://internal.wolfram.com/~jeffa/java/api/1.4_plugin.pdf


Jeff