Re: Calling #Macro Recursively

Thursday, October 15, 2009, 12:52:31 PM, Daniel Dekany wrote:

> Thursday, October 15, 2009, 6:00:35 AM, rizzz86 wrote:
>
>> Hi,
>>
>> I am trying to call <#macro> recursively.
>> I am getting the StackOVerFlowError, which means that their are unlimited
>> number of calls made wiithin a macro.
>>
>> What I was actually doing is "Rendering a Menu". I have a List that contains
>> a menu bean. That menu bean can also have its children and these children
>> are also a list containing a menu bean.
>>
>> example:
>>
>> class MenuBean {
>>
>>   String title;
>>   String url;
>>   List<MenuBean> children;
>>   etc..
>> }
>>
>> I can have N numbers of children for each menu (no limit).
>>
>> My macro is as follows:
>>
>> <#macro menugenerator menuList>
>>         <#if menuList??>
>>                 <#foreach element in menuList>
>>                         ${element.url} ${element.title} ..... // Generates
>> Menu
>>                         <#if element.children??>
>>                             <@menugenerator menuList=element.children/>
>>                         </#if>
>>                 </#foreach>
>>         </#if>
>> </#macro>
>>
>> Any reasons for the Error :-?
>
> Maybe the children field, when there are no children, is an empty list
> instead of null?

Actually that would cause only one extra call... so it's not that.

> Or... you managed to create a loop in the object
> graph?
>
>

-- 
Best regards,
 Daniel Dekany


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