Re: [WebMacro-user] How to get the context into a ContextTool

[Keats K. <ke...@xa...>]

You can just cast the Context to a WebContext.  Here's an example from 
the CGITool:

    public Object init (Context context)
            throws PropertyException
    {
        try
        {
            WebContext wc = (WebContext) context;
            CGI_Impersonator cgi = new CGI_Impersonator(wc);
            return cgi;
        }
        catch (ClassCastException ce)
        {
            throw new PropertyException(
                    "CGITool only works with WebContext", ce);
        }
    }


This is a good concept.  In fact we talked about creating a BrowserTool 
years ago, but nobody ever got around to it.

Keats

marcel.huijkman wrote:

> Thanks for the advise.
> This is the stuff in my log-file:
>
> 03-12-2004 00:21:08.734    broker    NOTICE    starting 
> org.webmacro.Broker: WebMacro.properties
> 03-12-2004 00:21:08.734    broker    NOTICE    Loaded settings from 
> WebMacro.defaults, WebMacro.properties, (System Properties)
> 03-12-2004 00:21:08.734    broker    WARNING    Context object Info is 
> not of type ContextObjectFactory
>
> So I changes a little bit but now I found out that Context isn't quite 
> the same as WebContext.
>
> What do I want it for?
>
> In WebContext you could do getRequest()
> which eventually could give you stuff like "USER_AGENT"
>
> So I could make a $BrowserInfo or something which would tell you the 
> browser's name or stuff like that.
> Based on this, you could make some clever markup things.
>
> I've got loads of utils, but it would be nice if I could share them 
> with others.
>
> So please kick me some more :-)
>
>
>
>
>
>
> Keats Kirsch wrote:
>
>> Turn on debugging and check the log.  It should show whether or not 
>> the Info tool got loaded and why it might have failed.
>>
>> Keats
>>
>> marcel.huijkman wrote:
>>
>>> I'm playing with this 'trick' but can't get it to work.
>>>
>>> in my webmacro.defaults I've got this:
>>> ContextTools.Info: org.webmacro.util.Info
>>>
>>> But when I do this in my template:
>>> $Info
>>>
>>> It says:
>>> Exception:org.webmacro.PropertyException$UndefinedVariableException:
>>> Attempted to write an undefined variable: $Info at 
>>> c:\mydir\wsf\templates\index.wmt:15.1
>>>
>>> So I think I must be doing something wrong.
>>>
>>> If somebody could kick me in the right direction, I'll sent some 
>>> virtual flowers from Holland :-)
>>>
>>>
>>>
>>>
>>> Keats Kirsch wrote:
>>>
>>>> I had developed a way to use "context-aware" functions, but I think 
>>>> the concept was rejected in favor of the new AutoContextVariable 
>>>> concept.
>>>> I believe it works something like:
>>>>
>>>> public class ContextManipulator implements ContextAutoLoader {
>>>>    public Object get(String name, Context context) throws 
>>>> PropertyException {
>>>>       return doSomethingWithTheContext(context);
>>>>   }
>>>> }
>>>>
>>>> I think you configure this as a ContextTool, like:
>>>>
>>>>    ContextTools.Manipulate: com.acme.wm.ContextManipulator
>>>>
>>>> And then access it in the template like:
>>>>
>>>> $Manipulate
>>>>
>>>> Hope this helps.
>>>>
>>>> Keats
>>>>
>>>> marcel.huijkman wrote:
>>>>
>>>>> How to get the context into a ContextTool?
>>>>>
>>>>> I am playing with a ContextTool, which  does a lot for me, but I
>>>>> want to be able to manipulate the context from within my too.
>>>>>
>>>>> I can do it in a dirty kind of way, by putting the context in
>>>>> a var "WM_CONTEXT" into the context.
>>>>>
>>>>> And if I have to get of set something, I'll do it like this in my 
>>>>> template:
>>>>> $util.manipulate($WM_CONTEXT);
>>>>>
>>>>> But I was wandering if there isn't any better, cleaner way to do 
>>>>> this?
>>>>> Can a ContextTool (that is loaded once) manipulate the exact context
>>>>> the end-user is playing with?
>>>>>
>>>>> - Marcel -
>>>>>
>>>>> PS. I start working for a java-company next year, so I hope to do 
>>>>> more WM.
>>>>>