TimeTranslator.java

package com.anjlab.tapestry5;

import java.text.MessageFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.regex.Pattern;

import org.apache.tapestry5.Field;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.Translator;
import org.apache.tapestry5.ValidationException;
import org.apache.tapestry5.ioc.Messages;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.FormSupport;

public class TimeTranslator implements Translator<Date> {

    public static final String LONG_TIME_REGEXP = "^(\\d|[01]\\d|[2][0123]):[012345]\\d$";
    
    public String getMessageKey() {
        return "time-format-exception";
    }

    public String getName() {
        return "time";
    }

    public Date parseClient(Field field, String clientValue, String message)
         throws ValidationException
    {
        try
        {
            return parseTime(new Date(), clientValue.trim());
        }
        catch (Exception ex)
        {
            throw new ValidationException(message);
        }
    }

    public void render(Field field, String message, MarkupWriter writer, FormSupport formSupport)
    {
        formSupport.addValidation(field, "regexp", message, LONG_TIME_REGEXP);
    }

    public Class<Date> getType() {
        return Date.class;
    }

    @Inject
    public Messages messages;    
    
    public String toClient(Date value) {
        return Utils.getFriendlyTime(messages, value);
    }

    /**
     * 
     * @param date
     * @param time Строка в формате ЧЧ:ММ
     * @return
     */
    public static Date parseTime(Date date, String time) {
        if (date == null) {
            throw new IllegalArgumentException("date");
        }
        if (time == null) {
            throw new IllegalArgumentException("time");
        }
        
        String regex = LONG_TIME_REGEXP;
        
        if (! Pattern.matches(regex, time)) {
            throw new IllegalArgumentException(
                    MessageFormat.format(
                            "Неверный формат времени: \"{0}\" не удовлетворяет регулярному выражению \"{1}\"",
                            time, regex));
        }
        
        String[] timeParts = time.split(":");
    
        Calendar calendar = Calendar.getInstance();
        
        calendar.setTime(date);
        
        calendar.set(Calendar.HOUR_OF_DAY, Integer.parseInt(timeParts[0]));
        calendar.set(Calendar.MINUTE, Integer.parseInt(timeParts[1]));
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
    
        return calendar.getTime();
    }

}