[jira] Commented: (VALIDATOR-221) DateValidator considers "02/29" with format "MM/dd" invalid

["Niall Pemberton (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/VALIDATOR-221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12468434 ] 

Niall Pemberton commented on VALIDATOR-221:
-------------------------------------------

This is a valid point but DateValidator is built on the premise of validating dates using java's DateFormat's parse method. Since as you point out this is a defect in the DateFormat implementation(s) then I don't really see a solution to this issue for the implementations validator provides.

If you can put forward a solution, I'd be happy to consider it - if not though I'll probably close this as WONT FIX.

> DateValidator considers "02/29" with format "MM/dd" invalid
> -----------------------------------------------------------
>
>                 Key: VALIDATOR-221
>                 URL: https://issues.apache.org/jira/browse/VALIDATOR-221
>             Project: Commons Validator
>          Issue Type: Bug
>    Affects Versions: 1.3.1 Release
>         Environment: Windows XP, Java 1.5.0_04
>            Reporter: Carsten Drossel
>            Priority: Minor
>
> When the date pattern contains only day and month the isValid(..)-method of DateValidator returns false for the value Feb. 29th.
> Here is a JUnit test that fails:
> public void testFebruary29th() throws Exception {
>   assertTrue( DateValidator.getInstance().isValid( "02/29", "MM/dd", true ) );
> }
> The DateValidator uses the parse(..)-method of SimpleDateFormat for the validation. This method appears to complete any date using 01/01/1970 00:00. Since 1970 was not a leap year a ParseException is thrown for the input "02/29" with the format "MM/dd" because 02/29/1970 is not a valid date.
> But IMHO "02/29" should be valid. An example where it makes sense is a search for persons with a certain birthday. 

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