Re: Enum as a model

Tuesday, May 31, 2011, 12:46:11 PM, magic creative wrote:

> The code was to help me clarify the problem. The real code where I
> am using this has a value set for the enum. However what you are
> saying is that Freemaker can directly work with enums as model values.

Yes. It doesn't treat them specially (it isn't enum-aware), but it
handles them just like it handles any other POJO-s. Maybe your
ObjectWrapper is something special? It should work with any
BeansWrapper descendants, like with the DefaultObjectWrapper.

> On Tue, May 31, 2011 at 11:02 AM, Daniel Dekany <[email protected]> wrote:
> Tuesday, May 31, 2011, 9:18:51 AM, magic creative wrote:
>
>> <code>
>> //Enum:
>>
>> public enum X {
>>      FIRST, SECOND
>> }
>>
>> //Class:
>>
>> public class Y {
>>
>>    private X localEnum;
>>
>>    public X getLocalEnum(){
>>       return this.localEnum;
>>    }
>>
>>    void setLocalEnum(X localEnum){
>>         this.localEnum = localEnum;
>>    }
>>
>> }
>>
>> //Insance to serve as model:
>>
>> Y yInstance = new Y();
>>
>> //Freemaker model:
>>
>> Map<String, Object> model = new HashMap<String, Object>();
>> model.put("yInst", yInstance);
>>
>> //Template:
>>
>> The value of X in Y: ${yInst.localEnum}
>>
>> </code>
>>
>> So what I have is a model which contains an enum and I want simply
>> to show the assigned value.
>
> The problem above is that you haven't set the localEnum property, so
> it's null. So when you write ${yInst.localEnum}, FreeMarker gets null,
> so it assumes that the property wasn't set (see FAQ). If you add
>
>  yInstance.setLocalEnum(X.FIRST);
>
> then it will print
>
>  The value of X in Y: FIRST
>
> --
> Best regards,
>  Daniel Dekany
>
>
>
>> I have read what you have referenced but
>> I do not see how to apply it to my quite simple case. On the other
>> hand I read a post where it is written that the problem with enums
>> is comming from the fact that instead of getName(), they are
>> reference with name() and thus Freemaker does not recognize that as
>> property but as function the return value of which it can not
>> display. I have a hard time however to believe that an enum can not
>> be used as a model for freemaker, there must be something I have missed.
>>
>>
>> On Mon, May 30, 2011 at 7:17 PM, Daniel Dekany <[email protected]> wrote:
>> Monday, May 30, 2011, 4:19:06 PM, magic creative wrote:
>>
>>> Hi guys,
>>>
>>>  I can not seem to find an example how to solve my problem so let me ask directly.
>>>
>>>  If there is an Enum X which is part of an object Y
>>
>> What does that mean in Java language?
>>
>> BTW, just in case you haven't red this, maybe this helps:
>> http://freemarker.org/docs/pgui_misc_beanwrapper.html#jdk_15_enums
>>
>>> I put as model and I reference X in my template I am getting:
>>>
>>>
>>>
>>> Expression Y.X is undefined
>>>
>>>
>>> The template has simply ${Y.X}. If X was a String there would be no
>>> problem and it would be displayed. As an Enum however it does not
>>> work. What should I do to allow enums to be parsed?
>>>
>>> Kind Regards
>> --
>> Best regards,
>>  Daniel Dekany
>>
>

-- 
Best regards,
 Daniel Dekany


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