In my project I use the following simple but logically useful interceptor.
Maybe Struts community will found its useful too.
BeforeValidationInterceptor.java
--------------------------------
/**
* This interceptor calls {...@link BeforeValidationAware#doBeforeValidation()}
* on actions which implement {...@link BeforeValidationAware}. This
interceptor
* is very useful for any situation, where you need to clean up or modify
some
* parameters just after all parameters are set but before validation and
* action method invoked.
*
* @see BeforeValidationAware
*
* @author Alex Siman
*/
@SuppressWarnings("serial")
public class BeforeValidationInterceptor extends AbstractInterceptor
{
@Override
public String intercept(ActionInvocation actionInvocation) throws
Exception
{
Object action = actionInvocation.getAction();
if (action instanceof BeforeValidationAware)
{
((BeforeValidationAware) action).doBeforeValidation();
}
return actionInvocation.invoke();
}
}
BeforeValidationAware.java
--------------------------------
/**
* @see BeforeValidationInterceptor
*
* @author Alex Siman
*/
public interface BeforeValidationAware
{
public void doBeforeValidation();
}
struts.xml
--------------------------------
<!-- ... -->
<interceptor-stack name="beforeValidationStack">
<!-- ... -->
<interceptor-ref name="params">
dojo\..*,^struts\..*
</interceptor-ref>
<interceptor-ref name="conversionError"/>
<interceptor-ref name="beforeValidation"/>
<interceptor-ref name="validation">
input,back,cancel
</interceptor-ref>
<!-- ... -->
</interceptor-stack>
<!-- ... -->
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