Hello.
We've recently have had a discussion on the Wicket Sweden mailing
list / user group ([EMAIL PROTECTED]) regarding how to
format the dates of the validation messages in DateValidator. It is,
as you probably know, possible to customize (localize) the validation
message i.e.:
DateValidator.range=The date is not within range! The date must be
after ${minimum} and before ${maximum}.
Our problem is that we can't find a way to affect the format of the
variables ${minimum} and ${maximum} (they will always be formated as a
new Date().toString()). These variables are added to the variablesMap
by static inner classes, i.e.:
DateValidator$RangeValidator.variablesMap(IValidatable validatable).
I proposed a solution where you extend the constructors of
DateValidator to include a SimpleDateFormat format, see below.
Alternatively, try to look up a pattern from a property (this would
result in the possibility to format the min and max dates diffrently)
i.e.:
DateValidator.minimum.format=yyyy-MM-dd
Thoughts? Is there a more simple/elegant solution?
Regards,
Per Engström
Curalia AB
import org.apache.wicket.markup.html.form.FormComponent;
import org.apache.wicket.validation.IValidatable;
import org.apache.wicket.validation.validator.AbstractValidator;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
public abstract class DateValidator extends AbstractValidator {
private static final long serialVersionUID = 1L;
public static DateValidator range(Date minimum, Date maximum, String
format) {
return new RangeValidator(minimum, maximum, format);
}
public static DateValidator minimum(Date minimum, String format) {
return new MinimumValidator(minimum, format);
}
public static DateValidator maximum(Date maximum, String format) {
return new MaximumValidator(maximum, format);
}
private static class RangeValidator extends DateValidator {
private static final long serialVersionUID = 1L;
private final Date minimum;
private final Date maximum;
private String format;
private RangeValidator(Date minimum, Date maximum, String
format) {
this.format = format;
this.minimum = minimum;
this.maximum = maximum;
}
protected Map variablesMap(IValidatable validatable) {
final Map map = super.variablesMap(validatable);
map.put("minimum", new
SimpleDateFormat(format).format(minimum));
map.put("maximum", new
SimpleDateFormat(format).format(maximum));
return map;
}
protected String resourceKey() {
return "DateValidator.range";
}
protected void onValidate(IValidatable validatable) {
Date value = (Date)validatable.getValue();
if (value.before(minimum) || value.after(maximum)) {
error(validatable);
}
}
}
private static class MinimumValidator extends DateValidator {
private static final long serialVersionUID = 1L;
private final Date minimum;
private String format;
private MinimumValidator(Date minimum, String format) {
this.format = format;
this.minimum = minimum;
}
protected Map variablesMap(IValidatable validatable) {
final Map map = super.variablesMap(validatable);
map.put("minimum", new
SimpleDateFormat(format).format(minimum));
return map;
}
protected String resourceKey() {
return "DateValidator.minimum";
}
protected void onValidate(IValidatable validatable) {
Date value = (Date)validatable.getValue();
if (value.before(minimum)) {
error(validatable);
}
}
}
private static class MaximumValidator extends DateValidator {
private static final long serialVersionUID = 1L;
private final Date maximum;
private String format;
private MaximumValidator(Date maximum, String format) {
this.format = format;
this.maximum = maximum;
}
protected Map variablesMap(IValidatable validatable) {
final Map map = super.variablesMap(validatable);
map.put("maximum", new
SimpleDateFormat(format).format(maximum));
return map;
}
protected String resourceKey() {
return "DateValidator.maximum";
}
protected void onValidate(IValidatable validatable) {
Date value = (Date)validatable.getValue();
if (value.after(maximum)) {
error(validatable);
}
}
}
}
