Concatenation of property name (EL) in JSF
How can I concatenate the name of a property using the EL?
This is what I tried:
<ui:repeat value="#{someBean.getParts()}" var="part">
<h:inputTextarea value="#{someOtherBean.result}#{part}" />
</ui:repeat>
But it didn't work.
The bean has the four property resultA, resultB, resultC and resultD. get开发者_高级运维Parts() returns "A", "B", "C", and "D".
It's quite possible though. You can use <ui:param>
to prepare the dynamic property name and use the brace notation []
to access it.
<ui:repeat value="#{someBean.parts}" var="part">
<ui:param name="resultPart" value="result#{part}" />
<h:inputTextarea value="#{someOtherBean[resultPart]}" />
</ui:repeat>
Needless to say that I agree with Michael that this is a smell in the model design.
I don't think that can be made to work without changing the design. It's generally a bad idea in Java to have a design that requires you to access methods fields and properties through a name, and worse if the name is built from strings.
Possible solutions:
- have
getParts()
return "resultA", "resultB", etc. and access them#{someOtherBean[getParts()]}
- change the property names to
a
,b
,c
,d
and access them as#{someOtherBean[getParts()]}
- have a single property
result
that contains aMap
with "A", "B", etc as keys and access the values as#{someOtherBean.result[getParts()]}
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