| An extended hash interface with a couple of extra hooks. If a class
implements this interface, then the built-in operators ?size,
?keys, and ?values can be applied to its
instances in the template.
As of version 2.2.2, the engine will automatically wrap the
collections returned by keys and values to
present them as sequences to the template. For performance, you may
wish to return objects that implement both TemplateCollectionModel
and
TemplateSequenceModel . Note that the wrapping to sequence happens
on demand; if the template does not try to use the variable returned by
?keys or ?values as sequence (theKeys?size, or theKeys[x],
or theKeys?sort, etc.), just iterates over the variable
(<#list foo?keys as k>...), then no wrapping to
sequence will happen, thus there will be no overhead.
author:
Jonathan Revusky
See Also: SimpleHash
version:
$Id: TemplateHashModelEx.java,v 1.13 2003/06/08 00:58:15 herbyderby Exp $ |