Doug Pierce created FLEX-34209:
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Summary: DateFormatter's parseDateTime method doesn't handle AM PM
properly when time is in the 12 PM hour
Key: FLEX-34209
URL: https://issues.apache.org/jira/browse/FLEX-34209
Project: Apache Flex
Issue Type: Bug
Affects Versions: Apache Flex 4.12.0
Reporter: Doug Pierce
DateFormatter.parseDateTime does not properly parse strings in the noon hour
with an AM or PM designator.
For example, "2/13/2014 12:23:22 PM" does not translate to a date and instead
returns a null value.
Upon research into this method, it appears that there is a secondary "catch
all" conditional for "Other Locales AM PM" that actually overwrites correct
derivation of the "hour" value that is used to create the return Date value:
// Other lacales AM/PM
if (ampm.hasOwnProperty(word))
{
isPM = true;
if (hour > 12)
break; // error
else if (hour >= 0)
hour += 12;
}
This conditional does not appear to handle any time between 12:00, including,
and 1:00 PM, excluding, properly as it makes the hour 24. When the final
return value is calculated, the 24 hour actually rounds the total date value UP
to the next day, resulting in a failed date derivation validation check found
near the bottom of this method:
// create a date object and check the validity of the input date
// by comparing the result with input values.
var newDate:Date = new Date(year, mon, day, hour, min, sec, milli);
if (day != newDate.getDate() || mon != newDate.getMonth())
return null;
The check compares the read "day" value against the derived "getDate()" value
which proves a true value - returning null instead of the derived date.
I'm unsure of the reasoning for the "other locales" conditional. Therefore
simply removing it may not be the proper solution. A better solution may be to
remove the 12 value from the conditional as so:
// Other lacales AM/PM
if (ampm.hasOwnProperty(word))
{
isPM = true;
if (hour > 12)
break; // error
else if (hour >= 0 && hour < 12)
hour += 12;
}
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