Disable custom validator during page load

Disable custom validator during page load

I have a custom validator on a JSF page and i am using view param to set
the value of callbackUrl intothe Backing Bean which is received in the
URL.
For example,
http://localhost:8080/myapp/index.jsf?callbackUrl=google.com
The JSF:
<f:metadata>
<f:viewParam id="callbackUrl" name="callbackUrl"
value="#{userbean.callbackUrl}">
<f:validator validatorId="com.me.something.CallbackUrlValidator" />
</f:viewParam>
</f:metadata>
I have a custom validator that checks the URL whether this is valid. The
custom validator executes once during page load and once during page
submit. I would like only the validator to kick in only during page
submit. Is there anyway i can do this?