Re: Using Enums

The problem is that FreeMarker uses JavaBeans naming convention for  
property-style accessors, and java.lang.Enum does not adhere to it.

In more detail:

Your Calculation class probably has a "getName()" method. JavaBeans  
standard says that referring to a property named "name" should invoke  
the "getName()" method. So far, so good.

However, java.lang.Enum defines a method named "name()", not  
"getName()". Thus, c.name is now a reference to a method, and not  
evaluation of the "name" property via "getName()" method. If you were  
to use enums, you'd have to use ${c.getName()}. Actually, you might  
try using ${c} on its own -- that should do an automatic toString(),  
which for enums happens to be equal to their name.

Attila.

On 2008.01.03., at 12:18, Luke Shannon wrote:

> Freemarker has been working fine so far writing out pojos. My pojo is
> called Calculation and a list of them is passed into the template:
>
> List<Calculation> calculations = new ArrayList<Calculation>();
>        calculations.add(instance1);
>        calculations.add(instance2);
>
>
> In the template I use <#list calculations as c> to be able to do
> something like this: c.name.
>
> No issues.
>
> I have attempted to go one step further and make the Calculation an
> enum. The reason for this is there is a set amount of possible
> Calculation instances (what I mean by this is a set amount of possible
> states for Calculation objects).
>
> Now I am doing something like this:
>
> List<Calculation> calculations = new ArrayList<Calculation>();
>        calculations.add(Calculation.NUMBER_ASSIGNMENTS);
>        calculations.add(Calculation.NUMBER_ASSIGNMENTS_EST);
>
> When I try and run the template I get the following:
>
> freemarker.core.NonStringException: Error on line 564, column 93 in
> claimsTemplate.ftl
> Expecting a string, date or number here, Expression c.name is instead
> a freemarker.ext.beans.SimpleMethodModel
>    at freemarker.core.Expression.getStringValue(Expression.java:126)
>    at freemarker.core.Expression.getStringValue(Expression.java:93)
>    at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
>    at freemarker.core.Environment.visit(Environment.java:208)
>    at freemarker.core.MixedContent.accept(MixedContent.java:92)
>    at freemarker.core.Environment.visit(Environment.java:208)
>    at freemarker.core.IteratorBlock 
> $Context.runLoop(IteratorBlock.java:179)
>    at freemarker.core.Environment.visit(Environment.java:415)
>    at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
>    at freemarker.core.Environment.visit(Environment.java:208)
>    at freemarker.core.MixedContent.accept(MixedContent.java:92)
>    at freemarker.core.Environment.visit(Environment.java:208)
>    at freemarker.core.Environment.process(Environment.java:188)
>    at freemarker.template.Template.process(Template.java:232)
>    at  
> com 
> .jaspersoft 
> .gates.claims.generator.ClaimsGenerator.main(ClaimsGenerator.java:167)
>
>
> When I do a search on FreeMarker and Enums I find myself reading about
> the TemplateHashModel. But I am not sure this is what I want.
>
> I basically want to put a list of enums and have FreeMarker access
> their members like the Pojos. Is this possible? I am pretty new to
> Enums, am I mis-using them in this case? Does anyone know a better way
> to do this?
>
> Thanks!




-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/