Fwd: [Jython-users] Getting Java interface information from a Java class in Jython

[Bill W. <wp...@gm...>]

---------- Forwarded message ----------
From: Helio R. Zwi <hz...@co...>
Date: Dec 8, 2005 10:38 AM
Subject: Re: [Jython-users] Getting Java interface information from a
Java class in Jython
To: Bill Woodward <wp...@gm...>


Use

<object name>.__class__.__bases__ (or <any_class_name>.__bases__)

It is the list of superclasses for the given class.  If the given class
is a Java class (no multiple inheritance allowed), one of the elements
is the actual superclass (always __bases__[0], as far as I can tell),
and the remaining (if any), the superinterfaces.  You can use it
"recursively", e.g.:

 >>> java.lang.StringBuffer.__bases__[0]
<jclass java.lang.AbstractStringBuilder at 25822411>

 >>> java.lang.StringBuffer.__bases__[0].__bases__[0]
<jclass java.lang.Object at 13059400>

 >>> java.lang.StringBuffer.__bases__[1]
<jclass java.io.Serializable at 25392329>

 >>> java.lang.StringBuffer.__bases__[2]
<jclass java.lang.CharSequence at 5791657>

 >>>

Helio


Bill Woodward wrote:

>Good morning,
>
>I'm using Jython 2.2a1 to do some client-side testing of a J2EE
>application on a somewhat more obscure J2EE application server.  In
>Jython, I am able to obtain an object from JNDI and call methods on it
>in Jython, very nicely, thank you very much.  However, when I try to
>turn that Jython code into some server-side Java code, I'm running
>into a problem.  In Jython, I can look at the class (using "<object
>name>.__class__"), as well as getting method and variable information
>about the class (using "dir(<object name>.__class__)"), but the actual
>Java class that is listed is an 'Impl' class.
>
>In order to use this object in Java, I need to know what interface to
>cast it to.  The application server is not well documented in this
>area, and I'm having trouble finding out what the Java interface is.
>Is there any way in Jython to obtain the interface(s) that class
>implements?  Or should I use the Java reflection classes to get it?
>
>TIA,
>- Bill
>
>--
>Bill Woodward     wp...@sa...      http://www.saifa.net
>
>"I have more trouble with D. L. Moody than with any other man I ever
>met." -- D. L. Moody
>        s/D. L. Moody/Bill Woodward/g
>
>
>-------------------------------------------------------
>This SF.net email is sponsored by: Splunk Inc. Do you grep through log fil=
es
>for problems?  Stop!  Download the new AJAX search engine that makes
>searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
>http://ads.osdn.com/?ad_idv37&alloc_id=16865&op=3Dclick
>_______________________________________________
>Jython-users mailing list
>Jyt...@li...
>https://lists.sourceforge.net/lists/listinfo/jython-users
>
>
>



--
Bill Woodward     wp...@sa...      http://www.saifa.net

"I have more trouble with D. L. Moody than with any other man I ever
met." -- D. L. Moody
        s/D. L. Moody/Bill Woodward/g