Hi all,
what is the recommended way to implement presentation logic in c3? JX
was our former choice but I could not find it in c3.
What should we use to implement simple presentation logic like we did
with jx? What are people using? Or do I need to migrate jx?
I tried to use the "string-template" component but I am running into a
problem when using $if(boolean)$.
I am ATM integrating Apache Shiro, a security framework that performs
authentication, authorization, cryptography, and session management,
into c3 and want to use something in the spirit of their taglibs
<shiro:notAuthenticated>
Please <a href="login.jsp">login</a>.
</shiro:notAuthenticated>
So what I did is I wrote a
ShiroInterpreter implements LanguageInterpreter that can extract this info.
However the interface LanguageInterpreter defines the return type to String.
<map:transform type="string-template">
<map:parameter name="isUser" value="{shiro:authenticated}"/>
</map:transform>
will fail then interpreting
$if(!isUser)$
<a href="/logout">/logout</a>
$else$
<a href="/login">/login</a>
$endif$
with
...
Caused by: org.stringtemplate.v4.compiler.STException: null
at
org.stringtemplate.v4.compiler.Compiler.reportMessageAndThrowSTException(Compiler.java:213)
~[ST4-4.0.4.jar:na]
If I use only $isUser$ I get the correct value. Reading "Conditional
subtemplates" [1]
"You may only test whether an attribute is present or absent, preserving
separation of model
and view. The only exception is that if an attribute value is a Boolean object,
it will test it for true/false."
So for me the exception either mean we do not support $if(condition)$ or that
the compiler do not likes that $isUser$ is a
String and not a boolean.
TIA for any feedback!
salu2
[1] http://www.cs.usfca.edu/~parrt/course/601/lectures/stringtemplate.html
--
Thorsten Scherler <thorsten.at.apache.org>
codeBusters S.L. - web based systems
<consulting, training and solutions>
http://www.codebusters.es/
