[stringtemplate-interest] [ST4] How to avoid map key iteration?

[Terence Parr]

Hi. my first thought is, don't try to iterate over the object.  

<adr.zip> <adr.city>

is same as:

<adr:{t|<t.zip> <t.city>}>

Ter
On Feb 11, 2011, at 5:45 AM, Udo Borkowski wrote:

> Hi,
> 
> is there any way to prevent the "iteration" over map keys when using a template like <m:{t|…}> (m may be a map or a simple object)?
> 
> Details:
> 
> I am using a template like this:
> 
> writeAddress(adr) ::= <<
> ...
> <adr:{t|<t.zip> <t.city>}>
> ...
> >>
> 
> adr represents an "Address" with properties "street", "zip", "city" etc.
> 
> Initially this was implemented by a bean-style model class Address. Everything worked as expected.
> 
> Now I changed the model class to a more "dynamic" implementation by using a Map. I.e. "zip", "city", etc. are now keys in the map, mapping to their resp. values.
> 
> Expressions like this:
> 
> <a.zip>
> 
> still work fine, but 
> 
> <adr:{t|<t.zip> <t.city>}>
> 
> runs into an error: 
> 
> no such property or can't access: java.lang.String.zip
> 
> This is because the new model instance "accidentally" is a Map and the expression now iterates over the keys of the map ("zip" being the first).
> 
> How can this iteration be avoided?
> 
> 
> Udo
> 
> 
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