Hum .. sorry .. too early in the morning for me .. Ledger is a hibernate
entity class and T5 should not be involved.
I'll be right back ...
2011/9/3 Gunnar Eketrapp <gunnar.eketr...@gmail.com>
> Hi !
>
> I have been happily hacking web sites with T5 for a year and half now and
> is more then pleased!
> Kudos to all of you for this excellent web framework that makes coding fun
> again.
>
> And I have never ever encountered any defect in the T5 code.
>
> Now to my problem.
>
> I just got an error in an onActivate method that looked like it could not
> happen.
>
> When steeping through it in my debugger I really get puzzled.
>
> A variable assigned inside a block is null after leaving the block.
>
> It must have something to do with the "plastering" of my code. Or !?
>
> The error I get is ..
>
> Caused by: java.lang.NullPointerException
> at
> utskicket.pages.economy.EditYear._$advised$onActivate_13(EditYear.java:91)
>
> ... and in the debugger I can see that ledger is null at line 91.
>
> In the code below I have commented what happens in the debugger.
>
> Can anyone understand what could cause this error ...
> I have stepped through the generated code without seeing anything strange.
> It all looks great but when returning ledger is null.
>
> Do I break any rule / convention with my code !?
>
> Many many thanks in advance,
> Gunnar Eketrapp, Stockholm, Sweden
>
> Environment:
> *jdk 1.6.0_22*
> *t5.2.6*
> *windows 7 proffesional, 32-bit*
>
>
> @Property
> private Ledger ledger;
>
> @Property
> private String notice;
>
> //
> ------------------------------------------------------------------------------
> // -- Tapestry event methods - Tapestry event methods - Tapestry event
> methods --
> //
> ------------------------------------------------------------------------------
>
> @Log
> Object onActivate(long groupId, long ledgerId) {
>
> group = groupDAO.findById(groupId);
> if (group == null)
> return Index.class;
>
> if (ledgerId != 0) {
> ledger = ledgerDAO.findById(ledgerId);
> if (ledger == null)
> return Index.class;
> if (!same(group.getId(), ledger.getGroup().getId()))
> return Index.class;
>
> hasPrevious = (null != ledgerDAO.findPrevious(ledger));
> hasNext = (null != ledgerDAO.findNext(ledger));
> transactionCount = transactionDAO.countTransactions(ledger);
>
> } else {
> ledger = new Ledger(); * // 1: This one returns null !!!*
> Ledger lastLedger = ledgerDAO.findLast(group);
> if (null == lastLedger) {
> UTDate today = new UTDate();
> ledger.setStartDate(new UTDate(today.getYear(), 1, 1)); *//
> 2: This line ends the block!*
> ledger.setEndDate(new UTDate(today.getYear(), 12, 31));
> } else {
>
> ledger.setStartDate(lastLedger.getStartDate().warpYears(1));
> ledger.setEndDate(lastLedger.getEndDate().warpYears(1));
> }
> }
>
> * if (ledger.getClosed()) // 3: And here we crash!*
> notice = "Året är stängt och kan inte ändras";
> else {
> if (!mayEdit())
> notice = "Endast det senaste året kan ändras.";
> else if (!mayEditStarts())
> notice = "Startdagen kan inte ändras då det finns tidigare
> år.";
> }
>
> return null;
> }
>
>
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