Re: Listing enumerations

Friday, March 9, 2012, 11:17:27 PM, Tim Pizey wrote:

> On 9 March 2012 21:26, Daniel Dekany  wrote:
>> What's the Java class and method behind database.displayTables?
>
> It was:
>
>   public Enumeration<Table> displayTables() {
>     return displayTables(PoemThread.inSession() ?
> PoemThread.transaction() : null);
>   }
>
>
> I have changed the template to
> <#list melati.database.getDisplayTables() as table>
>
> which uses
>
>   public List<Table> getDisplayTables() {
>     return EnumUtils.list(displayTables());
>   }
>
> which has moved me on to the next problem!
>
> (Melati, being ancient) does use a lot of Enumerations)

But

  public Enumeration<Table> displayTables()

is fine for FreeMarker, you just have to call it as:

  <#list melati.database.displayTables() as table>

Note the "()". Since displayTables is just a method, not a JavaBean
property, you have to call it to get the result. Otherwise you just
get the method itself. (Or, of course, you can use BeansWrapper
fine-tuning to expose these methods as if they were properties.)

> thanks for all your help
> Tim
>
>
>
>> --
>> Best regards,
>>  Daniel Dekany
>>
>>
>> Friday, March 9, 2012, 6:31:24 PM, Tim Pizey wrote:
>>
>>> Hi,
>>>
>>> I have a method which returns an Enumeration, but when it is rendered
>>> with #list or #foreach
>>> an exception is thrown:
>>>
>>> ?size is unsupported for: freemarker.ext.beans.OverloadedMethodModel
>>> The problematic instruction:
>>> ----------
>> ==>> list melati.database.displayTables as table [on line 67, column 50
>>> in org/melati/admin/Top.fml]
>>> ----------
>>>
>>> Java backtrace for programmers:
>>> ----------
>>> freemarker.template.TemplateModelException: ?size is unsupported for:
>>> freemarker.ext.beans.OverloadedMethodModel
>>>         at
>>> freemarker.ext.beans.OverloadedMethodModel.size(OverloadedMethodModel.java:149)
>>>         at
>>> freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:174)
>>>         at freemarker.core.Environment.visit(Environment.java:428)
>>>
>>> The template is:
>>>
>>> <select name="table" OnChange="submit();" title="Select table to edit">
>>> <#assign lasttype = "">
>>> <#assign selected = false>
>>> <#list melati.database.displayTables as table>
>>>   <#if !table.tableInfo.category.equals(lasttype)>
>>>     <option value="">&nbsp;</option>
>>>     <option value="">${table.tableInfo.category.name}</option>
>>>     <option value="">============</option>
>>>   </#if>
>>>   <#assign lasttype = table.tableInfo.category>
>>>   <option value="${table.name}"
>>>   <#if !selected>
>>>    <#if melati.table>
>>>     <#if melati.table.equals(table)>
>>>     selected="selected"
>>>      <#assign selected = true>
>>>    </#if>
>>>    <#else>
>>>     <#if table.getName().equals(admin.getPrimaryDisplayTable(melati))>
>>>      selected="selected"
>>>       <#assign selected = true>
>>>     </#if>
>>>    </#if>
>>>   </#if>> ${ml.rendered(table.displayName)}</option>
>>> </#list></select>
>>>
>>>
>>> I am using BeanWrapper.
>>>
>>> The documentation for #list
>>> http://freemarker.sourceforge.net/docs/ref_directive_list.html
>>> says, as far as I can understand, that an enumeration and and iterator
>>> should be usable.
>>>
>>> Sorry if this is a newbie error.
>>>
>>> thanks in advance
>>> Tim

-- 
Best regards,
 Daniel Dekany


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