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How can a custom-validator know which commandButton was clicked

my form has several "submit" buttons, and the validation of some of the fields depends on which was pressed. How can I find that out in my custom validator?

Solution

  • The button's client ID get also generated as name of the <input type="submit">. The name=value of the pressed <input type="submit"> get also sent as request parameters. So you could just check for that in the request parameter map.

    E.g.

    <h:form id="formId">
    ...
    <h:commandButton id="button1" ... />
    <h:commandButton id="button2" ... />
</h:form>

    with the following in validate() implementation:

    Map<String, String> params = context.getExternalContext().getRequestParameterMap();

if (params.containsKey("formId:button1")) {
    // Button 1 is pressed.
}
else if (params.containsKey("formId:button2")) {
    // Button 2 is pressed.
}