Taking a step back, I should say that if you're using java.util.Date with timezone info, "you're doing it wrong". java.util.Date is a trainwreck, and any methods that affect an internal notion of a TZ have been deprecated. If you care about timezones, using Date is a mistake - it's best to think of Date as purely a wrapper for millis-since-epoch, nothing more.
I strongly recommend purging java.util.Date from your code and using Joda Time instead. You can use DateTime to represent an instant (and set TZ if you want to format it for a locale) or you can use LocalDateTime to store an abstract notion of a time without a TZ - which, if you're taking a date as user input, is often what you really want to persist. Jeff On Wed, Jan 25, 2012 at 2:17 PM, Matthew Jaggard <matt...@jaggard.org.uk> wrote: > You could create a sortable date format string. For example, convert the > date to GMT and store it yyyy-mm-dd hh:mm:ss.nnn then store the timezone > afterwards so you can convert back to the date/time in the timezone. > > On 25 Jan 2012 19:05, "Kesava Neeli" <nke...@gmail.com> wrote: >> >> Thanks. That's what I was doing for some date fields now. Store the date >> in a well formatted string and then do conversions. But it becomes tough >> when you want to build a query "get me all records in last day" and the >> datastore for that object contains thousands of records. With the strings, >> you need to iterate through all records, get a date and then do a >> comparison. >> >> With "date" data type, you can rely on appengine to return correct data. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine for Java" group. >> To view this discussion on the web visit >> https://groups.google.com/d/msg/google-appengine-java/-/7sg4mVI55SMJ. >> To post to this group, send email to >> google-appengine-java@googlegroups.com. >> To unsubscribe from this group, send email to >> google-appengine-java+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/google-appengine-java?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to google-appengine-java@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
