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Group Validations inside data table

vaithee sub
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How do I perform Group Validations in h:datatable using custom Validators
For instance lets say I have a data table containing one column containing values of States (NY,NJ...).
In my custom Validator, I want to ensure that the state code does not repeat in any of the rows.

In the validator how do I get the ids for all the state codes to find the value in each of the component?

<h:dataTable id="tableEx1" value="#{careerDisplayBean.stateBarAdmissions}"
<h:inputText value="varstateBarAdmissions.stateCode" id="cd">
<h:validator validatorID="stateCodeValidator"/>
It is sorta covered in the JavaRanch Style Guide.
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