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« Return to Thread: Facing Issues with velocity sortTool to sort Two java.util.Date Type
Re: Facing Issues with velocity sortTool to sort Two java.util.Date Type
by Nathan Bubna
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If there is an exception (like a NullPointerException) during sorting,
then SortTool will return null. The null field is apparently causing
an exception. I'm not sure why, but i would guess that it is because
the java.util.Date class' compareTo method doesn't like it when you
pass in null as an argument. SortTool never calls compareTo on a null
object, but it will pass null objects in to compareTo (e.g.
myNotNullComparable.compareTo(nullComparable) ).
That's the best guess i have for you. You might try subclassing
SortTool to right your own sort method that can handle this situation.
or just making your Note class comparable and doing
$sorter.sort(${notes}).
On Thu, Apr 23, 2009 at 6:04 AM, Ranjeet <ranjeet.jha@...> wrote:
> Hi,
>
> I have a DTO Note.java in which there are some porperty like createdAt and
> updatedAt of java.util.Date type. I want to sort the order of list by
> updatedAt and createdAt. When I create the note/entity on that time I set
> java.util.Date() in createdAt property and not set in updatedAt so updatedAt
> property is null in db and dto both at very first, when I am going to update
> the same note/entity on that time I set the java.util.Date in updatedAt
> property and update the entity then both property becomes not null, means
> some values in dto and table. Now I want to sort the order of list by
> updatedAt and createdAt so recent updated record should come on top and want
> to shwo only recent five records only. If updatedAt and createdAt property
> is not null then works fine. for example if there is 3 record and 2
> note/entity are updated and one is not updated, means in list of 3 dto , 2
> dto have values in updatedAt and in one DTO the value in updatedAt is null,
> in this scenario not sorting and not displaying the records. I mean if any
> of the updatedAt property is null in dto list then not display the record,.
> I could not find the solution why this is not displaying while sorting?
>
>
> Thanks & Regards,
> Ranjeet
>
>
> ----- Original Message ----- From: "Nathan Bubna" <nbubna@...>
> To: "Velocity Users List" <user@...>
> Sent: Wednesday, April 22, 2009 11:56 PM
> Subject: Re: Facing Issues with velocity sortTool to sort Two java.util.Date
> Type
>
>
> Could you be more specific about what you mean by "not working"? What
> happens? The code sample looks like you are already implementing the
> search pattern you want. Why not just try:
>
> $sorter.sort(${campaign.notes})
>
> On Mon, Apr 20, 2009 at 3:42 AM, Ranjeet <ranjeet.jha@...>
> wrote:
>>
>> Hi All,
>>
>> I am using velocity 1.5 sortTool to sort the properties of list. I am
>> sorting two date, createdAt and updatedAt both property of dto are
>> java.util.Date type. I am trying to sort on updatedAt first and if
>> updatedAt
>> is null then on createdAt. Its working fine if there is some value
>> in updatedAt, but its not working if updatedAt has null value. Please help
>> me out of this problem. code sample is attached with this mail.
>>
>> Thanks & Regards,
>> Ranjeet
>>
>>
>>
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then SortTool will return null. The null field is apparently causing
an exception. I'm not sure why, but i would guess that it is because
the java.util.Date class' compareTo method doesn't like it when you
pass in null as an argument. SortTool never calls compareTo on a null
object, but it will pass null objects in to compareTo (e.g.
myNotNullComparable.compareTo(nullComparable) ).
That's the best guess i have for you. You might try subclassing
SortTool to right your own sort method that can handle this situation.
or just making your Note class comparable and doing
$sorter.sort(${notes}).
On Thu, Apr 23, 2009 at 6:04 AM, Ranjeet <ranjeet.jha@...> wrote:
> Hi,
>
> I have a DTO Note.java in which there are some porperty like createdAt and
> updatedAt of java.util.Date type. I want to sort the order of list by
> updatedAt and createdAt. When I create the note/entity on that time I set
> java.util.Date() in createdAt property and not set in updatedAt so updatedAt
> property is null in db and dto both at very first, when I am going to update
> the same note/entity on that time I set the java.util.Date in updatedAt
> property and update the entity then both property becomes not null, means
> some values in dto and table. Now I want to sort the order of list by
> updatedAt and createdAt so recent updated record should come on top and want
> to shwo only recent five records only. If updatedAt and createdAt property
> is not null then works fine. for example if there is 3 record and 2
> note/entity are updated and one is not updated, means in list of 3 dto , 2
> dto have values in updatedAt and in one DTO the value in updatedAt is null,
> in this scenario not sorting and not displaying the records. I mean if any
> of the updatedAt property is null in dto list then not display the record,.
> I could not find the solution why this is not displaying while sorting?
>
>
> Thanks & Regards,
> Ranjeet
>
>
> ----- Original Message ----- From: "Nathan Bubna" <nbubna@...>
> To: "Velocity Users List" <user@...>
> Sent: Wednesday, April 22, 2009 11:56 PM
> Subject: Re: Facing Issues with velocity sortTool to sort Two java.util.Date
> Type
>
>
> Could you be more specific about what you mean by "not working"? What
> happens? The code sample looks like you are already implementing the
> search pattern you want. Why not just try:
>
> $sorter.sort(${campaign.notes})
>
> On Mon, Apr 20, 2009 at 3:42 AM, Ranjeet <ranjeet.jha@...>
> wrote:
>>
>> Hi All,
>>
>> I am using velocity 1.5 sortTool to sort the properties of list. I am
>> sorting two date, createdAt and updatedAt both property of dto are
>> java.util.Date type. I am trying to sort on updatedAt first and if
>> updatedAt
>> is null then on createdAt. Its working fine if there is some value
>> in updatedAt, but its not working if updatedAt has null value. Please help
>> me out of this problem. code sample is attached with this mail.
>>
>> Thanks & Regards,
>> Ranjeet
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@...
>> For additional commands, e-mail: user-help@...
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@...
> For additional commands, e-mail: user-help@...
>
>
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> For additional commands, e-mail: user-help@...
>
>
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