[JBoss Seam] - Re: Excel support in Seam: any interest?
by fhh
Just to clarify: Jasper is fine for reporting. That's it. You define the design of a report and then the numbers and some formating is converted to Excel.
But in my company (and I guess everywhere else, too) people do not want simple preformated reports. They want to be able to work with the data, analyze, move columns around. This is not really possible in Jasper.
I think there are at least three huge advantages in having that taglib:
1.) Currently we use odbc datasources in Excel documents a lot. But this means that we pass database passwords around which is not really nice. And there is no really flexible way to specify filters on queries within excel documents.
2.) We are deling with the 65000 Row limit every day - even less for Pivot tables. If Excel is withdrawing data directly we usually have to get them at the lowest level so they can be aggregated by Excel pivot.
If I had a taglib we could just ask the user what aggregation he wants and then he would download a file with just the data he needs.
3.) If the templating thing would work then I could offload the design and creation of reports to the controllers themselves. They would just send me a version of there Excel file exactly as they would like to see it and tell me which data they want to be copied in there. No time wasted on "beautifying" things.
@mjek2: If there is anything I can contribute I would be glad to do so. I have some expreience with JExcelApi. Have you some code to share?
Regards
Felix
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19Â years, 1Â month
[JBoss Seam] - Seam 1.1.6 and Hibernate validation problem
by frehan
Hi!
I have a registration page for users to register. The entity class uses
@Email to validate the entered email adress.
In my registration jsp form I use <s:validateAll> arround the input fields.
and the email is a none required field. So it could be empty but if entered it must validate to a correct adress.
When i try to save the entity with an empty email field I get the following error.
Caused by: org.jboss.tm.JBossRollbackException: Unable to commit, tx=Transaction
Impl:XidImpl[FormatId=257, GlobalId=seit1497/470, BranchQual=, localId=470] stat
us=STATUS_NO_TRANSACTION; - nested throwable: (javax.persistence.PersistenceExce
ption: org.hibernate.AssertionFailure: null id in se.camitz.par.User entry (don't flush the Session after an exception occurs))
at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:372)
at org.jboss.tm.TxManager.commit(TxManager.java:240)
at org.jboss.tm.usertx.client.ServerVMClientUserTransaction.commit(Serve
rVMClientUserTransaction.java:140)
at org.jboss.seam.jsf.AbstractSeamPhaseListener.commitOrRollback(Abstrac
tSeamPhaseListener.java:287)
... 35 more
I get an org.hibernate.AssertionFailure failure telling me that my entity has a null Id..
IF I enter a correct email then everything works fine.
Does anybody know why I get this kind of error?
Best regards Fredrik
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19Â years, 1Â month