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I have a JSF page. My CommandButton action method value is dependent on the bean variable value. Example: Bean headerBean has varaible actionValue with value "someBean.doAction1()"

When I use , It says headerBean.actionValue is not a method which is right.

How can I get the action value as "someBean.doAction1" instead of headerBean.actionValue.

Thanks,

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  • can you post a little sample of what you have now? Commented Jun 2, 2011 at 20:28

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You can use the brace notation for that.

<h:commandButton value="submit" action="#{someBean[headerBean.actionValue]}" />

When the #{headerBean.actionValue} returns a String of for example doAction1, then this will effectively invoke #{someBean.doAction1}.

If the bean name to be called is currently actually in the actionvalue (headerBean.actionValue returning someBean.doAction1), you need to split it into a field that returns the bean name and one that returns the method name and then use

<h:commandButton value="submit" action="#{requestScope[headerBean.beanName][headerBean.actionValue]}" />

If headerBean.beanName returns 'someBean' and headerBean.actionValue returns doAction1 the above will call #{somebean.doAction1}.

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4 Comments

Hi, Thanks for replying. My headerBean.actionValue returns someBean.doAction1. I think using your solution makes it [code]#{someBean.someBean.doAction1}[code]. The value of headerBean.actionValue also return the bean name.
that's interesting -- i didn't realize that syntax works. thanks for the info.
wow. interesting syntax. I usually do something this similar with reflection, like generate the method name at runtime and use reflection to invoke it. Nice to know that I can do it in JSF as well. +1
@mahesh: you should split that on the period and then use something like (assuming that bean is request scoped) #{requestScope[headerBean.beanName][headerBean.beanAction]}. @Harry: I think you may find this example useful: stackoverflow.com/questions/5713718/…

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