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Message-ID: <8e161b980812030257r5b712e44ge66ae737b381e01c@mail.gmail.com>
Date: Wed, 3 Dec 2008 12:57:03 +0200
From: "Dimitar Vlasev" <vlasevdr@gmail.com>
To: "Struts Users Mailing List" <user@struts.apache.org>
Subject: Re: Dojo datetimepicker problem
In-Reply-To: <8e161b980812030053k5a9636eag39e5bfa84c16f431@mail.gmail.com>
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References: <8e161b980812020810g1accec0ep5eec85769d7c9fde@mail.gmail.com>
	 <4935A69A.90005@genome.med.harvard.edu>
	 <d8bdeb6f0812021413o7370d85yec7c52f04d49c7e6@mail.gmail.com>
	 <8e161b980812030053k5a9636eag39e5bfa84c16f431@mail.gmail.com>

Few findings:
http://struts.apache.org/2.0.14/docs/type-conversion.html
at section "Built in Type Conversion Support" documentation says:

XWork will automatically handle the most common type conversion for
you. This includes support for converting to and from Strings for each
of the following:
.........
 -> dates - uses the SHORT format for the Locale associated with the
current request
.........

But I haven't tried yet to utilize this feature.


This is what worked for me:

What I've done was to create custom type conversion class
-------------------------------
public class ShortDateConverter extends StrutsTypeConverter {
	public final static String pattern = "dd.MM.yyyy";
	private final static SimpleDateFormat format = new SimpleDateFormat(pattern);

	public Object convertFromString(Map context, String[] values, Class toClass) {
		Date result = null;

		if (values != null && values.length > 0) {	
			try {
				result = format.parse(values[0]);
			} catch (ParseException e) {
				throw new TypeConversionException("Error converting date from '" +
values[0] + "', pattern: '" + pattern + "'");
			}
		}
		return result;
	}

	public String convertToString(Map context, Object o) {
		return null;
	}

}

and applied it to the setter method within my action class:
(it worked well both using annotation and
<action_class_name>-conversion.properties file)
-----------------
	@TypeConversion (type=ConversionType.CLASS,
converter="test.ShortDateConverter")
	public void setADate(Date date) {
...............


Though it would be even elegant enough solution if I was able to refer
to the static pattern String in the .jsp like that
<s:datetimepicker displayFormat="<%=ShortDateConverter.pattern%>"/>
But I got exception:
According to TLD or attribute directive in tag file, attribute
displayFormat does not accept any expressions

I hope these findings will help someone else.


Regards,
Dimitar Vlasev

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