Hi folks,
I've run into a problem with Struts 2 validation annotations.
In short -- I have a VisitorFieldValidator on an action POJO named
ProductDetailAction. I have RequiredFieldValidator and
RequiredStringValidator on one field within the "visited" object.
Now -- ProductDetailAction did not (originally) inherit from ActionSupport.
I could see validation errors cropping up in my log, but my save() method
was still executing, because , as I understand it, without ActionSupport (or
ValidationAware) there was no way for Struts to redirect my action back to
my input() method when it found a validation error.
If I change the hierarchy so that ProductDetailAction DOES inherit,
indirectly, from ActionSupport, I can't even get to my input() method -- my
productDetail JSP doesn't render. Instead I get the following exception:
java.lang.IllegalArgumentException: The input() is not defined in action
class $Proxy99
at
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:412)
at
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)
at
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)
at
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:88)
(...)
I get the same exception if I simply implement ValidationAware in the same
way that ActionSupport does.
I'm including relevant snippets of ProductDetailAction, Product, and
struts.xml below. Does anyone have any insight as to why this might be
happening? I'm stumped, and so are my coworkers. Thanks.
Jim
-----
ProductDetailAction.java
-----
@Validation
public class ProductDetailAction extends FormularyDetailAction { // note:
FormularyDetailAction extends ActionSupport
// snippery
@Override
@SkipValidation
public String input() throws Exception {
if(id==null || id < 1) {
this.product = new Product();
} else {
this.product = formularyBso.fetchProduct(this.id);
}
return Action.INPUT;
}
@VisitorFieldValidator(message="")
public Product getProduct() {
return product;
}
// snippery
}
-----
Product.java
-----
@Entity
@Table(name="myrespironics.p_product_versions")
@Validation
public class Product extends FormularyProduct {
//snip
@RequiredFieldValidator(message="Please enter a value.")
@RequiredStringValidator(message="Please enter a value.")
public String getName() {
return name;
}
//snip
}
-----
struts.xml
-----
<struts>
<package name="user" extends="struts-default">
<interceptors>
<interceptor-stack name="myInterceptors">
<interceptor-ref name="exception"/>
<interceptor-ref name="alias"/>
<interceptor-ref name="params"/>
<interceptor-ref name="servletConfig"/>
<interceptor-ref name="prepare" />
<interceptor-ref name="i18n"/>
<interceptor-ref name="chain"/>
<interceptor-ref name="modelDriven"/>
<interceptor-ref name="fileUpload"/>
<interceptor-ref name="checkbox"/>
<interceptor-ref name="staticParams"/>
<interceptor-ref name="params"/>
<interceptor-ref name="conversionError"/>
<interceptor-ref name="validation">
<param name="excludeMethods">input,back,cancel</param>
</interceptor-ref>
<interceptor-ref name="workflow">
<param name="excludeMethods">input,back,cancel</param>
</interceptor-ref>
</interceptor-stack>
</interceptors>
<default-interceptor-ref name="myInterceptors"/>
<global-results>
<result name="error">/error.jsp</result>
</global-results>
<action name="productDetail" class="productDetailAction"
method="input">
<result name="success"
type="redirect-action">productList</result>
<result
name="input">/WEB-INF/secure/formulary/productDetail.jsp</result>
<result name="success-subcategory" type="redirect-action">
<param name="actionName">subcategoryDetail</param>
<param name="parse">true</param>
<param name="id">${subcategoryId}</param>
</result>
</action>
</package>
</struts>
--
Jim Kiley
Technical Consultant | Summa
[p] 412.258.3346 [m] 412.445.1729
http://www.summa-tech.com
