Add the capabilities to activate validation only in some cases
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Key: WW-3180
URL: https://issues.apache.org/struts/browse/WW-3180
Project: Struts 2
Issue Type: New Feature
Components: "New" API, Core Actions, Core Interceptors, XML Validators
Affects Versions: 2.1.7
Reporter: Laurent Mimoun
Problem
In our pages, we have one form for the entire page because the user must decide
(after a javascript confirmation) to save the data modified in all the block of
the page. But in some case and if the user decide not saving all the modified
page fields, we must only validate fields, the user want to save.
STRUTS ParameterInterceptor and ValidationInterceptor interceptors don't offer
a good solution for this problem : the only solution is to migrate the
validation annotations to declare validation rules in an XML file (but there
will be a lot of code duplication in this case) or coding rules by hand in a
validate method.
In our application, we found this trick but this is not elegant : we added a
new interceptor ValidationFilterInterceptor that calls a method dynamically (if
the action method id actionMethod, the validationFilterInterceptor will call
actionMethodValidationFilter).
Solution
We propose:
1. to add a new Annotation @ValidationCase(name="validationCase1") that applies
on the action method
2. to add a new parameter validationCase in all Validation annotation ex :
@RequiredValidator(key = "validation.required", validationCase={"case1"})
3. to take into account in ParameterInterceptor and ValidationInterceptor, this
annotation and new parameter in existing annotations to add
conversion/validation rules only for the annotation linked to the "current"
validation case.
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