Support Forums: Message List - JDO 2 passes JCP EC Reconsideration Ballot with 12 in favour http://www.theserverside.com Most recent forum messages en Jive Forums Silver 5.5.30 (www.jivesoftware.com) Tue, 21 May 2013 17:15:28 -0400 Safe query methods without class declarations or closures http://www.theserverside.com/discussions/thread.tss?thread_id=32200 The first parameter is the extent.
We used the term "extent" quite a bit in the Shlaer/Mellor methodology. It's most relevant today with object prevalance. Why doesn't the EJB-3 persistance specification mention it?]]> Mon, 07 Mar 2005 10:58:36 -0500 Mon, 07 Mar 2005 10:58:36 -0500 Mon, 07 Mar 2005 10:58:36 -0500 Mar 7, 2005 Brian Miller 0 Safe query methods without class declarations or closures http://www.theserverside.com/discussions/thread.tss?thread_id=32200
Object query(Cat cat, String name, double minWeight, double maxWeight){

  return (cat.getName().startsWith(name))
         && weight >=...]]> Mon, 07 Mar 2005 08:42:12 -0500 Mon, 07 Mar 2005 08:42:12 -0500 Mon, 07 Mar 2005 08:42:12 -0500 Mar 7, 2005 Carl Rosenberger 1 Safe queries, Good luck! ...and we will keep fighting http://www.theserverside.com/discussions/thread.tss?thread_id=32200 Sun, 06 Mar 2005 15:12:54 -0500 Sun, 06 Mar 2005 15:12:54 -0500 Sun, 06 Mar 2005 15:12:54 -0500 Mar 6, 2005 William Cook 0 Safe queries, Good luck! ...and we will keep fighting http://www.theserverside.com/discussions/thread.tss?thread_id=32200 Of course EJB3 supports dynamic queries.
Sure, but we were talking about build-time validation. There's a whole category of errors for dynamic queries that EJB-3 doesn't catch before query execution. That makes EJB-3 queries...]]> Sun, 06 Mar 2005 11:54:05 -0500 Sun, 06 Mar 2005 11:54:05 -0500 Sun, 06 Mar 2005 11:54:05 -0500 Mar 6, 2005 Brian Miller 0 Safe queries, Good luck! ...and we will keep fighting http://www.theserverside.com/discussions/thread.tss?thread_id=32200 ...but the principle approach is dead on: Clean plain code, members and fields described by typesafe object.field notation, use of existing Java syntax, no strings whatsoever, fully refactorable by IDEs.
We went through...]]> Sun, 06 Mar 2005 11:33:26 -0500 Sun, 06 Mar 2005 11:33:26 -0500 Sun, 06 Mar 2005 11:33:26 -0500 Mar 6, 2005 Brian Miller 0 Safe queries http://www.theserverside.com/discussions/thread.tss?thread_id=32200
public abstract class DeptsWithEmpSalary extends Department {
  public Employee emp; // variable
  public boolean evaluate(float sal) {
    return emps.contains(emp)...]]> Sun, 06 Mar 2005 07:29:51 -0500 Sun, 06 Mar 2005 07:29:51 -0500 Sun, 06 Mar 2005 07:29:51 -0500 Mar 6, 2005 Juozas Baliuka 0 Safe queries http://www.theserverside.com/discussions/thread.tss?thread_id=32200 +1...and thank you very much again for the link.
Glad to be to some help. Sorry that you didn't get any sleep though! ;-)

Just a thought: If byte code enhancement is a way to translate Safe Java DDL Queries into target...]]> Sun, 06 Mar 2005 03:50:26 -0500 Sun, 06 Mar 2005 03:50:26 -0500 Sun, 06 Mar 2005 03:50:26 -0500 Mar 6, 2005 Johan Strandler 0 Safe queries, Good luck! ...and we will keep fighting http://www.theserverside.com/discussions/thread.tss?thread_id=32200
It is trivial to validate "static" queries, but I have no idea how to validate "dynamic" stuff.
EJB-3 doesn't support dynamic queries either, so here the bar is quite low. Safe queries could...]]> Sat, 05 Mar 2005 22:53:03 -0500 Sat, 05 Mar 2005 22:53:03 -0500 Sat, 05 Mar 2005 22:53:03 -0500 Mar 5, 2005 Bill Burke 1 EOL http://www.theserverside.com/discussions/thread.tss?thread_id=32200
Sorry, wrong. There are multiple implementations of EJB 3 today. Container and containerless support, clear migration paths, etc. Sat, 05 Mar 2005 21:31:04 -0500 Sat, 05 Mar 2005 21:31:04 -0500 Sat, 05 Mar 2005 21:31:04 -0500 Mar 5, 2005 Debu Panda 0 Safe queries http://www.theserverside.com/discussions/thread.tss?thread_id=32200 if we had nice closures and could grab the bytecode for these when passed, it would be entirely possible to parse the bytecode into a query and then re-implement to the DB.
Yes!
 Sat, 05 Mar 2005 13:24:25 -0500 Sat, 05 Mar 2005 13:24:25 -0500 Sat, 05 Mar 2005 13:24:25 -0500 Mar 5, 2005 Carl Rosenberger 3 EOL http://www.theserverside.com/discussions/thread.tss?thread_id=32200 Sorry, wrong. There are multiple implementations of EJB 3 today. Container and containerless support, clear migration paths, etc. Sat, 05 Mar 2005 04:45:48 -0500 Sat, 05 Mar 2005 04:45:48 -0500 Sat, 05 Mar 2005 04:45:48 -0500 Mar 5, 2005 George Jiang 1 Safe queries http://www.theserverside.com/discussions/thread.tss?thread_id=32200
if we had nice closures and could grab the bytecode for these when passed, it would be entirely possible to parse the bytecode into a query and then re-implement to the DB.

However this would be a fairly advanced approach :-) and...]]> Sat, 05 Mar 2005 00:08:25 -0500 Sat, 05 Mar 2005 00:08:25 -0500 Sat, 05 Mar 2005 00:08:25 -0500 Mar 5, 2005 Thomas Whitmore 4 EOL http://www.theserverside.com/discussions/thread.tss?thread_id=32200 blah blah blah, fud, fud, fud
Sorry, wrong. There are multiple implementations of EJB 3 today. Container and containerless support, clear migration paths, etc.

 Fri, 04 Mar 2005 21:17:01 -0500 Fri, 04 Mar 2005 21:17:01 -0500 Fri, 04 Mar 2005 21:17:01 -0500 Mar 4, 2005 Donald Smith 2 Safe queries, Good luck! ...and we will keep fighting http://www.theserverside.com/discussions/thread.tss?thread_id=32200 Carl,Looks to me that you are after something like Safe Queries as described in this research document by William R. Cook: Fri, 04 Mar 2005 17:24:42 -0500 Fri, 04 Mar 2005 17:24:42 -0500 Fri, 04 Mar 2005 17:24:42 -0500 Mar 4, 2005 Carl Rosenberger 8 JDO in J2SE 6 http://www.theserverside.com/discussions/thread.tss?thread_id=32200 Sun reiterated that JSR 220 is the intended standard Java persistence API moving forward. This is not some breath of new life for JDO, it's the formal beginning of the end. - Don
"Tis many a slip 'twixt the cup...]]> Fri, 04 Mar 2005 13:59:42 -0500 Fri, 04 Mar 2005 13:59:42 -0500 Fri, 04 Mar 2005 13:59:42 -0500 Mar 4, 2005 David Ezzio 3