/**
 * Title:           DateUtisl, $Header: /share/gdi/SDI-Suite/Repository/projekte/BSH-GDI/genericViewer/src/main/java/de/conterra/bsh/gdi/gnviewer/util/DateUtils.java,v 1.2 2008/08/18 14:50:33 drewnak Exp $
 * Source:          $Source: /share/gdi/SDI-Suite/Repository/projekte/BSH-GDI/genericViewer/src/main/java/de/conterra/bsh/gdi/gnviewer/util/DateUtils.java,v $
 * created by:      Stefan Blume (blume)
 * erstellt am:     21.12.2007
 * Copyright:       con terra GmbH, 2005
 *
 * modified by:     $Author: drewnak $
 * modified on:     $Date: 2008/08/18 14:50:33 $
 * Version:         $Revision: 1.2 $
 * TAG:             $Name:  $
 * locked from:     $Locker:  $
 * CVS State:       $State: Exp $
 * Project:         $ProjectName$
 */
package de.intevation.gnv.geobackend.util;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.log4j.Logger;

/**
 * The class <code>DateUtils</code> fulfills the following purposes:
 * @author blume
 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
 */
public class DateUtils {

    /**
     * Default Logging instance
     */
    private static Logger sLogger = Logger.getLogger(DateUtils.class);

    /**
     * The Dateformat which will be used e.g for Querying the Database 
     */
    public static final String DATE_PATTERN = "yyyy.MM.dd HH:mm:ss";

    private static final String DATE_PATTERN1 = "dd-MMM-yyyy HH:mm:ss";

    /**
     * The Method returns a Date using the given pattern as a String
     * @param pDate The Date which should be formatted
     * @param sPattern The Pattern which should be used.
     * @return the Date formatted a a String
     */
    public static String getPatternedDate(Date pDate, String  sPattern) {
         SimpleDateFormat fmt = new SimpleDateFormat();
         fmt.applyPattern(sPattern);
         return fmt.format(pDate);
    }

    /**
     * Returns the Date as a String formated using the 
     * <code>DateUtils.DATE_PATTERN</code> format-
     * @param pDate the Date which should be formatted
     * @return the given Data as a String
     */
    public static String getPatternedDateAmer(Date pDate) {
        String sStr = getPatternedDate(pDate, DATE_PATTERN);
        return sStr;
    }

    /**
     * This method decodes a Datevalue from the given String useing the
     * <code>DateUtils.DATE_PATTERN1</code> format-
     * @param sStr The String which contains the encoded Datevalue
     * @return the decoded Datevalue as an Date-object.
     * @throws Exception throws all Expetion which occurs during the Process.
     */
    public static Date getDateFromString (String sStr)throws Exception {
        Date   date = getDateFromString (sStr, DATE_PATTERN1);
        return date;
    }

    /**
     * Formats a given Date encoded as a String using the given Pattern
     * into a Date Object.
     * @param sStr The String with the encoded DateValue
     * @param sPattern The pattern which should be used to decode the Date
     * @return the given Datevalue as an Date-Object.
     * @throws Exception throws all Expetion which occurs during the Process.
     */
    public static Date getDateFromString (String sStr, 
                                          String sPattern)throws Exception {
        SimpleDateFormat fmt = new SimpleDateFormat();
        fmt.applyPattern(sPattern);
        return fmt.parse(sStr);
    }
}