Re: Problems with Date validation

[Daniel Hopper]

Kinjal,
   In my experience with dates and validation, the problem you have 
having is quite possibly when you are coping the date values out of the 
ActionForm if you are trying to convert the string to a date right there 
in the get method and the value is an empty string no null.  Since the 
BeanUtils.popuplate will call a set method with "" instead of null.  
Here is a sample class that may help you track down the problem, 
basically I just check the value when the setter is called to make sure 
it isn't zero length string, if so I actually want the value to be null 
instead.  Seeing your ActionForm in which this is happening would help, 
but here is a simple example of what may get you pasted the error.

public class Sample extends ValidatorForm /* or ValidatorActionForm */ {   
   private String strExpiration;

   public Date getExpiration() {
       if(strExpiration != null) {
           return Date.valueOf(strExpiration);
       }
      
       return null;
   }

   public void setExpiration(Date expiration) {
       if(expiration != null) {
           this.strExpiration = expiration.toString();
       }
   }
   public String getStrExpiration() {
       return strExpiration;
   }
   public void setStrExpiration(String strExpiration) {
       this.strExpiration = zeroLengthSet(strExpiration);
   }
  
   protected String zeroLengthSet(String str) {
       if (s != null && s.length() > 0) {
           return str.trim();
       }
      
       return null;
   }
}

Good Hunting
-daniel hopper
Kinjal Shares wrote:
Dear all,
I've been trying to get Dates validation for my Struts
project without any success. I'm using struts 1.2.4
with Validator 1.1.3 on tomcat 5.0.27. 

In my application, I'm having a hier of
MappingActionForm for Action, where individual action
mappings in struts-config map to individual method in
the Action class. The form is a child of
ValidatorActionForm with a VO bean for holding
business data and a string for holding the value for
the date field. The VO bean contains a java.sql.Date
field. In the getter and setter of the textual field,
I get and set the data from VO bean, so as to have
virtually a String-only ActionForm.
I'm pasting relevant codes below
struts-config.xml:
-------------------------------------------------
<action path="/inquiry/submitDetail" 
	parameter="submitDetail" 
	name="inquiryForm" 
	scope="session" 
	validate="true" 
	input="/pages/inquiry/editDetail.jsp" 
	type="foo.bar.struts.action.InquiryAction">
<forward name="previewDetail"
path="/pages/inquiry/previewDetail.jsp"/>
</action>
--------------------------------------------------

validation.xml: 
--------------------------------------------------
<form name="/inquiry/submitDetail">
	<field property="offerEndDate" depends="required"
page="1">		
<arg0 key="inquiry.form.header.offerEndDate"/>
	</field>
</form>
--------------------------------------------------

editDetail.jsp:
--------------------------------------------------
<html:form action="/inquiry/submitDetail">
        <html:hidden property="page" value="1" />
        <html:text name="inquiryForm" property="offerEndDate"
/>
        ..
        ..
</html:form>
--------------------------------------------------
Now, everytime I submit the page and if the field is
empty it throws me an exception related to
beanUtils.populate(). According to my understanding
this type of exception should only come when struts
copying data into the ActionForm is problamatic.
However, it seems to me that the validator is somehow
bypassed. 

If I remove the copying (to and from the VO bean into
the textual date field) code from my ActionForm, it
validates things properly.
I'm not sure what is going wrong here and hence I'm
seeking the advise here. I've gone throgh all major
mailing lists and forums for struts for any hints on
this, but could find little. I'm sorry for such a long
post, but I wanted include maximum data into the post.
Thanks and regards,
Kinjal Sonpal

		
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