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

score 1 · Answer 1 · answered Feb 06 '14 at 11:45

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Did you try this:

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

answered Feb 06 '14 at 11:45

Amr Gawish

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Amr Gawish, thank you for your suggestion. I solved my issue, but your idea sounds well. Thank you – yaki_nuka Feb 06 '14 at 13:57
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! – Amr Gawish Feb 06 '14 at 14:12
I found a solution before testing your approach. So, I put the link I followed to solve it. But thank you a lot again – yaki_nuka Feb 19 '14 at 14:41

score 0 · Answer 2 · edited May 23 '17 at 11:56

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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.

See also:

edited May 23 '17 at 11:56

Community

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answered Feb 05 '14 at 15:50

unwichtich

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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 Feb 06 '14 at 08:50

score 0 · Accepted Answer · answered Feb 06 '14 at 08:53

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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 06 '14 at 08:53

yaki_nuka

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

3 Answers3