ADF EL: check if an item is contained in a list

Question

I'm using JDeveloper 11.1.1.7.0

In the backing bean, I have a List attribute called myList, with related public and standard getter and setter methods, and I need to check if a String is contained inside it, in the context of an EL expression.

I have tried this expression:

disabled="#{myBean.myList.contains(label)}"

But it fails, and the message is that character ( has found instead of [ , . , or, eq, ...

I have tried to generate my custom TLD following this clear and well-explained steps How to create a custom EL function?, but I got an error becaus the function I declare is not found.

How can I check this condition (String contained in a List) in an EL expression? Thanks in advance. Regards

Amr Gawish · Accepted Answer · 2014-02-06 11:45:35Z

1

Did you try this:

disabled="#{empty myBean.myList[label]}"

answered Feb 6, 2014 at 11:45

Amr Gawish

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3 Comments

yaki_nuka Over a year ago

Amr Gawish, thank you for your suggestion. I solved my issue, but your idea sounds well. Thank you

Amr Gawish Over a year ago

I'm glad you solved it, but if the answer I provided is also a valid answer, can you mark it as the right answer!

yaki_nuka Over a year ago

I found a solution before testing your approach. So, I put the link I followed to solve it. But thank you a lot again

Community · Accepted Answer · 2017-05-23 11:56:06Z

0

If you really have an attribute of type List in your backing bean this should work.

You can also use it in the following ways:

disabled="#{myBean.myList.contains('the text')}"

disabled="#{not myBean.myList.contains(label)}" // contains not

disabled="#{myBean.myList.contains(label) eq true}"

disabled="#{!myBean.myList.contains(label)}" // contains not

If this doesn't work maybe something is wrong with your list.

1 Comment

yaki_nuka Over a year ago

thank you for your suggestions, but they don't work for me. An EL Expression can't pass parameters when invoking a function, but there is a tricky idea to make something like that. Thank you again

yaki_nuka · Accepted Answer · 2014-02-06 08:53:19Z

0

An EL Expression can't pass parameters when invoking a function, but I found this link which explain an idea to simulate a passing-parameters by using a Map. It works perfect for me: Pass parameters from EL to a method: Simulation

answered Feb 6, 2014 at 8:53

yaki_nuka

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