Subj : Re: array access issue - what am i doing wrong
To   : netscape.public.mozilla.jseng
From : ash mozilla
Date : Fri Jan 28 2005 06:15 pm

--0-62905318-1106964902=:21302
Content-Type: text/plain; charset=us-ascii

This seems to be related with inheritance. MyForm is derived from the base class and elements is a member of MyForm. If i move elements to the base class it works. how can i make rhino to treat form[0] as MyForm and not as its base class?
 
thanks

ash mozilla <ashmozilla@yahoo.com> wrote:
I'm a pretty new to Java and Rhino. I'm not sure whether I'm doing the things the right way.
Here is a description:
Scenario - I need to programmatically execute some javascript functions inside a web response.
Approach - I'm providing my own objects for the context objects like document, window, forms etc. For this I have classes like MyDocument, MyWindow, MyForm, MyControls, etc.
On getting the response I initialize these objects with their properties and event handlers.
 
Problem - If I have a button control in the first form, the value of the control can be accessed thru window.document.forms[0].value.
 
I load my context objects to the context by calling ScriptableObject.putProperty(....."window", window, ...);
 
Now I want to evaluate the above control value "window.document.forms[0].elements[0].value".
But evaluateString throws an exception saying something about 0.0 access. 
I can get window.document.forms[0], this return MyForm correctly. window.document.forms[0].elements[0] it returns as "not defined". window.document.forms[0].elements[0].value it throws the exception.
 
what could have gone wrong? Something to do with the way I deal the arrays I think.
 
 


---------------------------------
Do you Yahoo!?
Yahoo! Mail - Easier than ever with enhanced search. Learn more.
		
---------------------------------
Do you Yahoo!?
 Take Yahoo! Mail with you! Get it on your mobile phone.
--0-62905318-1106964902=:21302
Content-Type: text/html; charset=us-ascii

<DIV>This seems to be related with inheritance. MyForm is derived from the base class and elements is a member of MyForm. If i move elements to the base class it works. how can i make rhino to treat form[0] as&nbsp;MyForm and not as its base class?</DIV>
<DIV>&nbsp;</DIV>
<DIV>thanks<BR><BR><B><I>ash mozilla &lt;ashmozilla@yahoo.com&gt;</I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<DIV>I'm a pretty new to Java and Rhino. I'm not sure whether I'm doing the things the right way.</DIV>
<DIV>Here is a description:</DIV>
<DIV>Scenario - I need to programmatically execute some javascript functions inside a web response.</DIV>
<DIV>Approach - I'm providing my own objects for the context objects like document, window, forms etc. For this I have classes like MyDocument, MyWindow, MyForm, MyControls, etc.</DIV>
<DIV>On getting the response I initialize these objects with their properties and event handlers.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Problem - If I have a button control in the first form, the value of the control can be accessed thru window.document.forms[0].value.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I load my context objects to the context by calling ScriptableObject.putProperty(....."window", window, ...);</DIV>
<DIV>&nbsp;</DIV>
<DIV>Now I want to evaluate the above control value "window.document.forms[0].elements[0].value".</DIV>
<DIV>But evaluateString throws an exception saying something about 0.0 access. </DIV>
<DIV>I can get window.document.forms[0], this return MyForm correctly. window.document.forms[0].elements[0] it returns as "not defined". window.document.forms[0].elements[0].value it throws the exception.</DIV>
<DIV>&nbsp;</DIV>
<DIV>what could have gone wrong? Something to do with the way I deal the arrays I think.</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<P>
<HR SIZE=1>
Do you Yahoo!?<BR>Yahoo! Mail - Easier than ever with enhanced search. <A href="http://us.rd.yahoo.com/evt=29916/*http://info.mail.yahoo.com/mail_250">Learn more.</A></BLOCKQUOTE><p>
		<hr size=1>Do you Yahoo!?<br> 
<a href="http://us.rd.yahoo.com/mail_us/taglines/mobile/*http://mobile.yahoo.com/maildemo">Take Yahoo! Mail with you!</a> Get it on your mobile phone.
--0-62905318-1106964902=:21302--

.