ognl: notation

["F.R. Da Costa Gomez" <dc...@fixed.com>]

Hi all,

Just 2 small questions:

I've got an A.page & an A.java and an A.html as well as a Home.(page, 
html & java)
 From Home.html I can do <span jwcid="@Insert" value="ognl:message">, no 
worries.

Q: What is the syntax for doing the same thing from A.html (call the 
Home.getMessage() method that is)?
Following are the ones I more or less expected but I'm probably 
overlooking something because they give me an "unable to resolve 
expression" error.
    <span jwcid="@Insert" value="ognl:home.message">
    <span jwcid="@Insert" value="ognl:Home.message">
    <span jwcid="@Insert" 
value="ognl:fully.qualified.classname.Home.message">

Q2: Is there any compelling reason to NOT just use @Insert rather than 
mixing @Insert and @InsertText?

Thx in advance 4 the help,

Fermin DCG

Re: ognl: notation

[Eric Everman <ev...@precedadesign.com>]

What you are trying to isn't possible.  A page can not call methods on 
another page because you have no reference to the page (just like in the 
Java object model).  Without a reference there may be zero or many 
instances of that page, so there is no way to determine which instance to 
call getMessage() on.  Tapestry pools instances of pages (see the docs for 
this), so you should *never* try hold to hold a reference to a page or 
component in your code.

If you need to store cross-page info like this, use the Visit interface.


Eric Everman

At 3/17/2003, you wrote:
>Hi all,
>
>Just 2 small questions:
>
>I've got an A.page & an A.java and an A.html as well as a Home.(page, html 
>& java)
> From Home.html I can do <span jwcid="@Insert" value="ognl:message">, no 
> worries.
>
>Q: What is the syntax for doing the same thing from A.html (call the 
>Home.getMessage() method that is)?
>Following are the ones I more or less expected but I'm probably 
>overlooking something because they give me an "unable to resolve 
>expression" error.
>    <span jwcid="@Insert" value="ognl:home.message">
>    <span jwcid="@Insert" value="ognl:Home.message">
>    <span jwcid="@Insert" value="ognl:fully.qualified.classname.Home.message">
>
>Q2: Is there any compelling reason to NOT just use @Insert rather than 
>mixing @Insert and @InsertText?
>
>Thx in advance 4 the help,
>
>Fermin DCG
>
>
>
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