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| ////////////////////////////////////////////////////////////////////////////////
// DateParser.as
//
// An as3 implementation of the java SimpleDateFormat like class based on Flex
// SDK which can be used to parse a String with specified format to as3 Date
// object.
//
// This code is a modification version of Daniel Wabyick's as2
// SimpleDateFormatter(http://osflash.org/simpledateformatter) which
// is directly adapted from Matt Kruse's Javascript class implementation.
//
// @author edison.guo(http://www.hydra1983.com)
// @author Daniel Wabyick(http://www.fluid.com)
// @author Matt Kruse (http://www.JavascriptToolbox.com)
// The following notice is maintained from Matt Kruse's
// original Javascript code.
//
// NOTICE: You may use this code for any purpose, commercial or
// private, without any further permission from the author. You may
// remove this notice from your final code if you wish, however it is
// appreciated by the author if at least my web site address is kept.
//
// USAGE
// ----------------------------------------------------------------------
// These functions use the same pattern letters used by the DateFormatter
// class provided by Flex SDK. You can find the detailed description of
// these letter in the Adobe Flex Language Reference.
// Examples:
// var dateString:String = "9/10/2008 GMT+0800 08:30:41";
// var parser:DateParser = new DateParser();
// parser.formatString = "M/D/Y HH:NN:SS";
// trace(parser.parse(dateString));
// //Wed Sep 10 08:30:41 GMT+0800 2008
//
// ----------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////////////
package
{
import mx.formatters.Formatter;
import mx.utils.StringUtil;
public class DateParser
{
private static const VALID_PATTERN_CHARS:String = "Y,M,D,A,E,H,J,K,L,N,S,Q";
public var error:String;
private var _formatString:String = "YYYY-MM-DD HH:NN";
public function get formatString():String
{
return _formatString;
}
public function set formatString(value:String):void
{
if(value) _formatString = value;
}
private var _defaultInvalidFormatError:String = Formatter.defaultInvalidFormatError;
public function get defaultInvalidFormatError():String
{
return _defaultInvalidFormatError;
}
public function set defaultInvalidFormatError(value:String):void
{
_defaultInvalidFormatError = value;
}
private var _defaultInvalidValueError:String = Formatter.defaultInvalidValueError;
public function get defaultInvalidValueError():String
{
return _defaultInvalidValueError;
}
public function set defaultInvalidValueError(value:String):void
{
_defaultInvalidValueError = value;
}
public function parse( value:Object):Date
{
if (error)
error = null;
if(!(value is String))
{
error = defaultInvalidValueError;
return null;
}
if(!value || value == "")
{
error = defaultInvalidValueError;
return null;
}
var timezoneRegEx:RegExp = /(GMT|UTC)((\+|-)\d\d\d\d(\s)?)?/ig;
value = StringUtil.trim(String(value).replace(timezoneRegEx, ""));
var letter:String;
var nTokens:int = 0;
var tokens:String = "";
var n:int = formatString.length;
for (var i:int = 0; i < n; i++)
{
letter = formatString.charAt(i);
if (VALID_PATTERN_CHARS.indexOf(letter) != -1 && letter != ",")
{
nTokens++;
if (tokens.indexOf(letter) == -1)
{
tokens += letter;
}
else
{
if (letter != formatString.charAt(Math.max(i - 1, 0)))
{
error = defaultInvalidFormatError;
return null;
}
}
}
}
if (nTokens < 1)
{
error = defaultInvalidFormatError;
return null;
}
var dataParser:DateStringParser = new DateStringParser(
formatString, VALID_PATTERN_CHARS);
return dataParser.parseValue(value);
}
}
}
import mx.formatters.DateBase;
class DateStringParser
{
private static var digits:String = "1234567890";
private static var dayNames:Array = DateBase.dayNamesLong.concat(DateBase.dayNamesShort);
private static var monthNames:Array = DateBase.monthNamesLong.concat(DateBase.monthNamesShort);
public function DateStringParser(format:String, tokens:String)
{
super();
this.format = format;
this.tokens = tokens;
}
private var format:String;
private var tokens:String;
public function parseValue(value:Object):Date
{
var valueString:String = String(value);
var i_value:int = 0;
var i_format:int = 0;
var char_token:String = "";
var token:String = "";
var start:int = 0;
var end:int = 0;
var now:Date = new Date();
var years:Object = now.getFullYear();
var months:Object = now.getMonth() + 1;
var dates:Object = now.getDate();
var days:Object = now.getDay();
var hours:Object = now.getHours();
var minutes:Object = now.getMinutes();
var seconds:Object = now.getSeconds();
var milliseconds:Object = now.getMilliseconds();
var ampm:String = "";
var max:int = 0;
var min:int = 0;
while(i_format < format.length)
{
char_token = format.charAt(i_format);
if(tokens.indexOf(char_token) > -1)
{
start = format.indexOf(char_token);
end = format.lastIndexOf(char_token);
end = end >= 0 ? end + 1 : start + 1;
token = format.substring(start,end);
i_format = end;
if(token == "YYYY" || token == "YY" || token == "Y")
{
if(token == "YYYY") {max = min = 4;}
if(token == "YY") {max = min = 2;}
if(token == "Y"){max = 4;min = 2;}
years = getIntegerValue(valueString,i_value,min,max);
if(isNaN(Number(years))) return null;
i_value += String(years).length;
years = Number(years);
}
else if(token == "MM" || token == "M")
{
months = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(months)) || months < 1 || months > 12) return null;
i_value += String(months).length;
months = Number(months);
}
else if(token == "MMMM" || token == "MMM")
{
var monthName:String = getMonthName(valueString,i_value);
if(!monthName || monthName.length == 0) return null;
months = getMonths(monthName);
if(isNaN(Number(months)) || months < 1 || months > 12) return null;
i_value += monthName.length;
months = Number(months);
}
else if(token == "EE" || token == "E")
{
days = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(days)) || days < 1 || days > 7) return null;
i_value += String(days).length;
days = Number(days);
}
else if(token == "EEEE" || token == "EEE")
{
var dayName:String = getDayName(valueString,i_value);
if(!dayName || dayName.length == 0) return null;
days = getDays(dayName);
if(isNaN(Number(days)) || days < 1 || days > 7) return null;
i_value += dayName.length;
days = Number(days);
}
else if(token == "DD" || token == "D")
{
dates = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(dates)) || dates < 1 || dates > 31) return null;
i_value += String(dates).length;
dates = Number(dates);
}
else if(token == "AA" || token == "A")
{
ampm = valueString.substr(i_value,2).toUpperCase();
if(ampm != "AM" && ampm != "PM") return null;
i_value += 2;
}
else if(token == "JJ" || token == "J")
{
hours = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(hours)) || hours < 0 || hours > 23) return null;
i_value += String(hours).length;
hours = Number(hours);
}
else if(token == "HH" || token == "H")
{
hours = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(hours)) || hours < 1 || hours > 24) return null;
i_value += String(hours).length;
hours = Number(hours);
}
else if(token == "KK" || token == "K")
{
hours = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(hours)) || hours < 0 || hours > 11) return null;
i_value += String(hours).length;
hours = Number(hours);
}
else if(token == "LL" || token == "L")
{
hours = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(hours)) || hours < 1 || hours > 12) return null;
i_value += String(hours).length;
hours = Number(hours);
}
else if(token == "NN" || token == "N")
{
minutes = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(minutes)) || minutes < 0 || minutes > 59) return null;
i_value += String(minutes).length;
minutes = Number(minutes);
}
else if(token == "SS" || token == "S")
{
seconds = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(seconds)) || seconds < 0 || seconds > 59) return null;
i_value += String(seconds).length;
seconds = Number(seconds);
}
else if(token == "QQQ" || token == "QQ" || token == "Q")
{
milliseconds = getIntegerValue(valueString,i_value,token.length,2);
if(isNaN(Number(milliseconds)) || milliseconds < 0 || milliseconds > 999) return null;
i_value += String(milliseconds).length;
milliseconds = Number(milliseconds);
}
}
else
{
i_format ++;
i_value ++;
}
}
if (i_value != valueString.length) { return null; }
if (months == 2)
{
var isLeapYear:Boolean = isLeapYear(Number(years));
if(isLeapYear && dates > 28) return null;
if(!isLeapYear && dates > 29) return null;
}
if (((months == 4)||(months == 6)||(months == 9)||(months == 11)) && dates > 30)
return null;
if(hours < 12 && ampm == "PM") {hours = (Number(hours)) + 12;}
else if(hours > 11 && ampm == "AM") {hours = (Number(hours)) - 12};
return new Date(years,(Number(months)) - 1,dates,hours,minutes,seconds,milliseconds);
}
public function getIntegerValue(dateString:String,index:int,min:int,max:int):Object
{
var valueString:String;
for(var i:int = max;i >= min;i--)
{
valueString = dateString.substring(index,index + i);
if(valueString.length < min) return NaN;
if(isInteger(valueString)) return valueString;
}
return NaN;
}
private function isInteger(valueString:String):Boolean
{
var n:int = valueString.length;
for(var i:int = 0;i < n;i++)
{
if(!isDigit(valueString.charAt(i)))
return false;
}
return true;
}
private function isDigit(char:String):Boolean
{
return digits.indexOf(char) > -1;
}
private function getDayName(valueString:String,index:int):String
{
var n:int = dayNames.length;
var dayName:String;
for(var i:int = 0;i < n;i++)
{
dayName = dayNames[i];
if(valueString.substr(index,dayName.length) == dayName)
return dayName;
}
return "";
}
private function getDays(dayName:String):Number
{
var day:Number = dayNames.indexOf(dayName) + 1;
day = day > 12? day - 12:day;
day = day == 0?NaN:day;
return day;
}
private function getMonthName(valueString:String,index:int):String
{
var n:int = monthNames.length;
var monthName:String;
for(var i:int = 0;i < n;i++)
{
monthName = monthNames[i];
if(valueString.substr(index,monthName.length) == monthName)
return monthName;
}
return "";
}
private function getMonths(monthName:String):Number
{
var month:Number = monthNames.indexOf(monthName) + 1;
month = month > 12? month - 12:month;
month = month == 0?NaN:month;
return month;
}
private function isLeapYear(year:Number):Boolean
{
return ((year % 4 == 0) && (year % 100 != 0)) || ( year % 400 == 0);
}
} |
