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Handling JSF error messages at Apply Request Value Phase  RSS feed

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I'm using JSF 2.1.2 with Richfaces 4.

I'm trying to find a solution for the following problem.

- A user installs the 'Tamper Data' plugin for firefox (Used to intercept and modify http requests values when submitting forms).
- The user visits a page on my application and fills out some input fields. One of the input fields is a richfaces calendar component, they select a date from the calendar popup and the input field beside it is populated.
- They open the 'Tamper Data' plugin and select 'Start Tamper'.
- They submit the form (normal synchronous request).
- The use the Tamper Data plugin to add invalid charchters to some of the calendar components request values.
- The request is sent with tampered data to Bean.
- The page is returned with the following error messages displayed:

For the page the request is performed on, I have a <f:messages /> component

I believe this is happening due to the component values not been converted to the appropriate objects at the 'Apply Request Values' phase (Due to their values been tampered with).

I want to send users to a generic error page when these type of errors occur.

Options I have tried without any success include:

I created a custom converter on the calendar component but also is of no use.

Has anyone created something similar to handle JSF error messages at this 'Apply Request Values' phase?
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