thats really nice - would you put it on the wiki?
Cheers,
Ron
Geoff Callender wrote:
The minDate and maxDate validators are not portable across application servers
or locales. For example minDate=7/1/2005 is accepted by Tomcat but JBoss
will reject it because it expects something like minDate=Sep 1 2005
(see http://thread.gmane.org/gmane.comp.java.tapestry.user/28533)
So I wrote portable alternatives that ALWAYS expect a yyyy-MM-dd string.
They're called IsoMinDate and IsoMaxDate. Suggestions to improve them are
very welcome.
-- Here's how you might use them in your html:
validators=
"validators:required,isoMinDate=1999-01-01,isoMaxDate=2069-12-31"
-- eg.
<input jwcid="@DatePicker" value="ognl:order.date"
translator="translator:date,pattern=dd MMM yyyy" displayName="Order date"
validators="validators:required,isoMinDate=1970-01-01,
isoMaxDate=2069-12-31">1 Sep 2005</input>
-- Here's the java for one of the custom validator, IsoMinDate. It extends and
uses MinDate, but it accepts a String and parses it the way we like.
package mypackage;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.tapestry.form.validator.MinDate;
public class IsoMinDate extends MinDate {
private static final String defaultFormatStr = "yyyy-MM-dd";
private static final DateFormat defaultDateFormat =
new SimpleDateFormat(defaultFormatStr);
public void setIsoMinDate(String isoMinDate) {
try {
Date date = defaultDateFormat.parse(isoMinDate);
super.setMinDate(date);
}
catch (ParseException e) {
throw new IllegalArgumentException("Value received for isoMinDate is \""
+ isoMinDate
+ "\" which does not match format \"" + defaultFormatStr + "\".", e);
}
}
}
-- The validators have to be registered with HiveMind. Create or modify
WEB-INF/hivemodule.xml to something like this:
<?xml version="1.0"?>
<module id="mystuff" version="1.0.0" package="mypackage">
<contribution configuration-id="tapestry.form.validator.Validators">
<validator name="isoMinDate" configurable="true"
class="mypackage.IsoMinDate"/>
</contribution>
<contribution configuration-id="tapestry.form.validator.Validators">
<validator name="isoMaxDate" configurable="true"
class="mypackage.IsoMaxDate"/>
</contribution>
</module>
-- That's it. I hope this helps whomever.
Geoff
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