Antonio Petrelli on 29/08/07 07:46, wrote:
2007/8/29, Adam Hardy <[EMAIL PROTECTED]>:
However it doesn't really give much of an idea of what you mean. A 'hint'?
Presumably this means that your code checks whether this attribute is null
before executing an algorithm to establish what exactly the put-attribute
is defining?
I will try to clarify it with an example. Suppose that you declared a Tiles
definition called "my.definition", but you want to put the value
"my.definition" as a string. In this case, you need to use: type="string"
otherwise the "my.definition" definition will be used.
Thanks for the clarification.
I was confused by tiles' handling of a simple configuration error I had made.
Tiles by default just ignored my attempt to insert a JSP, because I had given
the wrong directory in the tiles.xml, therefore I was effectively trying to
insert a non-existent JSP with a tiles:insertAttribute tag.
I think it would certainly have been desirable in this case to throw an
exception and ditch the response, however I can't see a way to configure that
and it's too late to help now anyway. It may be advantageous though to configure
tiles that way by default to minimise frustration for newbies such as myself.
It did occur to me though that the handling of insertion of non-existent JSPs
may be container-dependent. A recent porting of a tiles-1.0 app to Websphere
revealed that it throws exceptions if I tried to insert a zero-length string as
the name of a JSP.
It meant I had to insert an empty "blank.jsp" file as the value for attributes
in my abstract tile definition which other tiles could choose override if
desired - i.e. leaving the attributes as "" causes Websphere to throw an exception.
I haven't got so far as deploying to Websphere with my current app so I can't
say whether this still applies in tiles-2. The tiles-2 ability to create
extending definitions that can define new attributes not declared in the
abstract definition may be a feature that circumvents that old tiles-1 Websphere
issue - hopefully. I can let you know if I upgrade that old tiles-1 app to
tiles-2 at some point. (Would love to but it's not one of the priorities at the
moment!)
Best regards
Adam
