Android Open Source - PersianDatePicker Persian Date Parser

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License

The source code is released under:

Apache License

Java Source Code

/**
 * Persian Calendar see: http://code.google.com/p/persian-calendar/
   Copyright (C) 2012  Mortezaadi@gmail.com
   PersianDateParser.java/*  w w w .  j  a va2s . c  om*/
   
   Persian Calendar is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package ir.smartlab.persindatepicker.util;

/**
 * Parses text from the beginning of the given string to produce a
 * PersianCalendar.
 * 
 * <p>
 * See the {@link #getPersianDate()} method for more information on date
 * parsing.
 * 
 * <pre>
 *                Example
 *                     
 *  {@code
 *    PersianCalendar pCal =
 *     new PersianDateParser("1361/3/1").getPersianDate();             
 *  }
 * </pre>
 * 
 * @author Morteza contact: <a
 *         href="mailto:Mortezaadi@gmail.com">Mortezaadi@gmail.com</a>
 * @version 1.0
 */
public class PersianDateParser {

  private String dateString;
  private String delimiter = "/";

  /**
   * <pre>
   * construct parser with date string assigned
   * the default delimiter is '/'.
   * 
   * To assign deferment delimiter use:
   * {@link #PersianDateParser(String dateString, String delimiter)}
   * 
   *                     Example
   *                     
   *  {@code
   *    PersianCalendar pCal =
   *     new PersianDateParser("1361/3/1").getPersianDate();             
   *  }
   * </pre>
   * 
   * @param dateString
   */
  public PersianDateParser(String dateString) {
    this.dateString = dateString;
  }

  /**
   * <pre>
   * construct parser with date string assigned
   * the default delimiter is '/'. with this constructor
   * you can set different delimiter to parse the date
   * based on this delimiter.
   * see also:
   * {@link #PersianDateParser(String dateString)}
   * 
   *                     Example
   *                     
   *  {@code
   *    PersianCalendar pCal =
   *     new PersianDateParser("1361-3-1","-").getPersianDate();             
   *  }
   * </pre>
   * 
   * @param dateString
   * @param delimiter
   */
  public PersianDateParser(String dateString, String delimiter) {
    this(dateString);
    this.delimiter = delimiter;
  }

  /**
   * Produce the PersianCalendar object from given DateString throws Exception
   * if couldn't parse the text.
   * 
   * @return PersianCalendar object
   * @exception RuntimeException
   */
  public PersianCalendar getPersianDate() {

    checkDateStringInitialValidation();

    String tokens[] = splitDateString(normalizeDateString(dateString));
    int year = Integer.parseInt(tokens[0]);
    int month = Integer.parseInt(tokens[1]);
    int day = Integer.parseInt(tokens[2]);

    checkPersianDateValidation(year, month, day);

    PersianCalendar pCal = new PersianCalendar();
    pCal.setPersianDate(year, month, day);

    return pCal;
  }

  /**
   * validate the given date
   * 
   * @param year
   * @param month
   * @param day
   */
  private void checkPersianDateValidation(int year, int month, int day) {
    if (year < 1)
      throw new RuntimeException("year is not valid");
    if (month < 1 || month > 12)
      throw new RuntimeException("month is not valid");
    if (day < 1 || day > 31)
      throw new RuntimeException("day is not valid");
    if (month > 6 && day == 31)
      throw new RuntimeException("day is not valid");
    if (month == 12 && day == 30 && !PersianCalendarUtils.isPersianLeapYear(year))
      throw new RuntimeException("day is not valid " + year + " is not a leap year");
  }

  /**
   * planned for further calculation before parsing the text
   * 
   * @param dateString
   * @return
   */
  private String normalizeDateString(String dateString) {
    // dateString = dateString.replace("-", delimiter);
    return dateString;
  }

  private String[] splitDateString(String dateString) {
    String tokens[] = dateString.split(delimiter);
    if (tokens.length != 3)
      throw new RuntimeException("wrong date:" + dateString + " is not a Persian Date or can not be parsed");
    return tokens;
  }

  private void checkDateStringInitialValidation() {
    if (dateString == null)
      throw new RuntimeException("input didn't assing please use setDateString()");
    // if(dateString.length()>10)
    // throw new RuntimeException("wrong date:" + dateString +
    // " is not a Persian Date or can not be parsed" );
  }

  public String getDateString() {
    return dateString;
  }

  public void setDateString(String dateString) {
    this.dateString = dateString;
  }

  public String getDelimiter() {
    return delimiter;
  }

  public void setDelimiter(String delimiter) {
    this.delimiter = delimiter;
  }

}

Java Source Code List

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