How to create a custom Constraint on a d:date Property

ipirat — Mon, 26 May 2014 22:41:56 GMT

Hi all,I have a custom model with two custom properties of type d:date (my:fromDate and my:toDate), both are mandatoryNow I'd like to ensure that that the my:toDate is equal or later than the my:fromDate.<ol><li>My first goal is to implement a custom Constraint class, which takes two (co

Re: How to create a custom Constraint on a d:date Property

ipirat — Mon, 26 May 2014 22:58:18 GMT

To overcome the Date-String-Conversions, I modified the constraint class to be
<java>
public class DateMinMaxConstraint extends AbstractConstraint {

    private static final String DATE_FORMAT = "yyyy-MM-dd";

    private Date minDate;
    private Date maxDate;

    public String getMinDate() {
        DateFormat df = new SimpleDateFormat(DATE_FORMAT);
        return df.format(this.minDate);
    }

    public void setMinDate(String dateStr) {
        DateFormat df = new SimpleDateFormat(DATE_FORMAT);
        try {
            this.minDate = df.parse(dateStr);
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }

    public String getMaxDate() {
        DateFormat df = new SimpleDateFormat(DATE_FORMAT);
        return df.format(this.maxDate);
    }

    public void setMaxDate(String dateStr) {
        DateFormat df = new SimpleDateFormat(DATE_FORMAT);
        try {
            this.maxDate = df.parse(dateStr);
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }

    @Override
    public Map<String, Object> getParameters() {
        Map<String, Object> params = new HashMap<String, Object>(2);
        params.put("minDate", this.minDate);
        params.put("maxDate", this.maxDate);
        return params;
    }

    protected void evaluateSingleValue(Date val) {

    }

    @Override
    protected void evaluateSingleValue(Object val) {

        if (!(val instanceof Date)) {
            throw new ConstraintException("the property is not of type d:date");
        } else {
            Date dateVal = (Date) val;
            if (dateVal.after(this.maxDate) || dateVal.before(this.minDate)) {
                throw new ConstraintException(MessageFormat.format("the date {0,date," + DATE_FORMAT + "} must be between {1,date," + DATE_FORMAT
                        + "} and {2,date," + DATE_FORMAT + "} ", val, this.minDate, this.maxDate));
            }
        }

    }
}
</java>

which basically overcomes the conversion problem by defining the parameters as Strings and doing the conversion in the setters…

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How to create a custom Constraint on a d:date Property

Re: How to create a custom Constraint on a d:date Property