Package org.exoplatform.webui.form.validator

Source Code of org.exoplatform.webui.form.validator.DateTimeValidator

/**
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/

package org.exoplatform.webui.form.validator;

import org.exoplatform.web.application.ApplicationMessage;
import org.exoplatform.webui.core.UIComponent;
import org.exoplatform.webui.exception.MessageException;
import org.exoplatform.webui.form.UIForm;
import org.exoplatform.webui.form.UIFormDateTimeInput;
import org.exoplatform.webui.form.UIFormInput;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

/**
* Created by The eXo Platform SARL
* Author : Tran The Trong
*          trongtt@gmail.com
* May 15, 2007
*
* Validates whether a date is in a correct format
*/

public class DateTimeValidator implements Validator
{
   static private final String SPLIT_REGEX = "/|\\s+|:";

   static private final String DATETIME_REGEX =
      "^(\\d{1,2}\\/\\d{1,2}\\/\\d{1,4})\\s*(\\s+\\d{1,2}:\\d{1,2}:\\d{1,2})?$";

   public void validate(UIFormInput uiInput) throws Exception
   {
      if (uiInput.getValue() == null || ((String)uiInput.getValue()).trim().length() == 0)
         return;
      String s = (String)uiInput.getValue();
      DateFormat stFormat = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
      UIFormDateTimeInput uiDateInput = (UIFormDateTimeInput)uiInput;
      SimpleDateFormat sdf = new SimpleDateFormat(uiDateInput.getDatePattern_().trim());

      UIForm uiForm = ((UIComponent)uiInput).getAncestorOfType(UIForm.class);
      String label;
      try
      {
        label = uiForm.getId() + ".label." + uiInput.getName();
      }
      catch (Exception e)
      {
         label = uiInput.getName();
      }
      Object[] args = {label, s};

      try
      {
         // Specify whether or not date/time parsing is to be lenient.
         sdf.setLenient(false);
         Date stDate = sdf.parse(s);
         s = stFormat.format(stDate);
      }
      catch (Exception e)
      {
         throw new MessageException(new ApplicationMessage("DateTimeValidator.msg.Invalid-input", args));
      }
      if (s.matches(DATETIME_REGEX) && isValidDateTime(s))
         return;

      throw new MessageException(new ApplicationMessage("DateTimeValidator.msg.Invalid-input", args));
   }

   private boolean isValidDateTime(String dateTime)
   {
      String[] arr = dateTime.split(SPLIT_REGEX, 7);
      int valid = Integer.parseInt(arr[0]);
      if (valid < 1 || valid > 12)
         return false;
      Calendar date = new GregorianCalendar(Integer.parseInt(arr[2]), valid - 1, 1);
      if (Integer.parseInt(arr[1]) > date.getActualMaximum(Calendar.DAY_OF_MONTH))
         return false;
      if (arr.length > 3
         && (Integer.parseInt(arr[3]) > 23 || Integer.parseInt(arr[4]) > 59 || Integer.parseInt(arr[5]) > 59))
         return false;
      return true;
   }
}
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