EJB QL-What does the Object keyword in select clause do ?

I always wondered when do you need to use the Select object( ) keyword ? I read this:
[http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/EJBQL5.html#73030]
but didn't find it very clear.
Cheers,
Michal

see
@ejbgen:entity Annotation
go to
http://edocs.bea.com/workshop/docs81/doc/en/core/index.html
see
max-beans-in-cache
Set it to 1
See also
@ejbgen:finder Annotation
- group-name
- max-elements
set it to 1 or to desired
optional:
Add to a group the desired cmp fields, if u don't want to display all the columns.
After the exec. of the findMethod u should have 1 Object, one EJB inst., in your Collection, and furthermore only the desired DB table columns

Similar Messages

What does the this keyword do?

i don't really understand this code very well, can anyone give me a link or a little explanation that would help me with it? I'm not sure what the this keyword does, and the toString method is puzzling as well.
thanks.
public class Friend
     protected String name;
     protected String telephone;
     protected Friend next;
     static Friend list;
     public static void print() {
     Friend friend = list;
     if(friend == null) System.out.println("The list is empty.");
     else do {
     System.out.println(friend);
     friend = friend.next;
     } while (friend != null);
     public Friend(String name, String telephone)
     this.name = name;
     this.telephone = telephone;
     this.next = list;
     list = this;
     public String toString()
     return new String(name+":\t"+telephone);
class TestFriend
     public static void main(String args[])
     Friend.print();
     new Friend("Anita Murray", "388-1095");
     new Friend("Bill Ross", "283-9104");
     new Friend("Nat Withers", "217-5912");
     Friend.print();
}

about the code in post 1, is there any other code
that could replace what's inside the friend method
but would still print the same output?
for example could i replace "this.name = name;" etc
with anything else?In the context of that constructor, there are two name variables--the parameter and the member variable. The parameter is what was passed into the c'tor, and the member varaible is part of the state of the current object--the object being initialized.
So, when we just say "name", it means the parameter, and if we want to refer to the name variable that's part of the object, then we say "this.name"--that is, the name varaible belonging to "this" object (the "current" object).
If there were no local variable or parameter called "name", then instead of "this.name" we could just say "name" to refer to the current object's name variable, because there would be no ambiguity.

What does the private keyword mean exactly?

Hi,
I thought I understood what "private" meant, but apparently not fully.
Can someone explain the difference between the following two chunks of code and why one compiles when the other doesn't?
class Component
private Object loopID;
private Container container;
public boolean isActive()
    return loopID == container.loopID; //Doesn't Compile
    return loopID == getContainer().loopID; //Does compile
public Container getContainer()
    return container;
class Container extends Component
}

Put simply, private means you can't access the
variable from outside
the class. So you cannot use the "." operator to get
access to it.
But the method can return a reference to it, so the
accessor method
allows you to return a reference to the variable.
Think of it this way:
If you want to do "x.y" or "x.y()", the
variable/method has to be public.
If the variable/method is private, you can't access
it with ".".
By the way, there is an edit button--It is in the
right corner above the message. I just added this
with it. I didn't know it was there before.
Message was edited by:
WhyNotFerzlePut simply: no. Private means that access is only allowed from within the body of the top level class where it the member or constructor is declared. Your example is just wrong on a number of levels. I can access the member of an instance using "." if I have access, and I cannot if I do not have access.

HT201210 What does the do not disturb selecton mean? under settings

What does the 'do not disturb' selection mean under settings?

It allows you to not be disturbed by calls, messages, E-Mail notifications, etc. You can also set it for certain times, like from 10:30pm to 6am

Does anyone know what does the keyword section do?

Does anyone know what does the keyword section do? Under "Any of the webpages -> Properties -> Basic tab -> Tags/Keywords"?
Is it used for part of the google search?

Its tagging (Classification), one of the bright feature of any content management system. It allows author to classify the content in system. There are various advantages but i would refer you to go through http://dev.day.com/docs/en/cq/current/wcm/tag_admin.html. Apart from that you can search in google as well to find relative information about classification in content management system.

What is the object for ?

Hello,
I need to do a program which show the result of a select in a DataBase.
I would like to show them as in a peer to peer software, I mean in different categories that I could possibly sort by clicking in the name of the category. What is the object for that.
Thank you.
PS: Excuse my english, I'm french

ummm...I don't really understand what you are asking for. But you know that objects are created from a class and it inherits the attributes of that class. It could either be from the built-in classes of java or the one that you built on your own. I suggest looking at java help and see if there are any classes that can satisfy what it is that you want to do, if none does, then you're gonna have to create a class of your own then create an object from that...not sure if this answers your question, i'm kinda like shooting in the dark here....=)

What does the usage of CURSOR word mean in an SQL statement?

Hey folks,
Please check out the following query and do please explain me what does the usage of CURSOR keyword in an SQL statement mean.
select deptno,cursor(select ename from emp a where a.deptno=b.deptno) from dept b;
well, the output was like this,
DEPTNO CURSOR(SELECTENAMEFR
10 CURSOR STATEMENT : 2
CURSOR STATEMENT : 2
ENAME
CLARK
KING
20 CURSOR STATEMENT : 2
CURSOR STATEMENT : 2
ENAME
SMITH
JONES
SCOTT
ADAMS
FORD
30 CURSOR STATEMENT : 2
CURSOR STATEMENT : 2
ENAME
ALLEN
WARD
MARTIN
BLAKE
TURNER
JAMES
6 rows selected.
40 CURSOR STATEMENT : 2
CURSOR STATEMENT : 2
no rows selected
Your favour'll be deeply appreciated.
Cheers,
PCZ

This returns a non-square result set. Each row of the result is a deptno and then a result set of the enames in that deptno.
This can be useful when you need to send a lot of data to a client application in a single query that would otherwise contain a lot of redundancy. It tends to be a relatively unusual construct (I've only found one situation where it was appropriate in my career) and requires some relatively sophisticated understanding on both the database and client sides.
Justin

What does the standard program RFBIBL00    does?

what does the standard program RFBIBL00    does?

Hi Bharath
Accounting Documents: Data Transfer Workbench
Definition
Transferring FI accounting documents from an external system into the SAP System using program RFBIBL00.
Use
You use program RFBIBL00 to enter accounting documents and to clear open items.
Method
Program RFBIBL00 primarily transfers accounting documents using the batch input method. However, you can also generate documents immediately using call transaction or direct input by means of the "Data transfer type" parameter. Both of these procedures lead to improvements in system performance when transferring large quantities of data (more than 10,000 transactions).
Object-Specific Settings
With call transaction or direct input, documents are posted immediately to the SAP System. As a result, you need to ensure that if for any reason the program is terminated, it can be restarted without inconsistencies occurring in the data.
other information:
To enhance the batch input procedure, the system offers the direct input technique, especially for transferring large amounts of data. In contrast to batch input, this technique does not create sessions, but stores the data directly. It does not process screens. To enter the data into the corresponding database tables directly, the system calls a number of function modules that execute any necessary checks. In case of errors, the direct input technique provides a restart mechanism. However, to be able to activate the restart mechanism, direct input programs must be executed in the background only. To maintain and start these programs, use program RBMVSHOW or Transaction BMV0.
Examples for direct input programs are:
Program        Application
RFBIBL00         FI
RMDATIND       MM
RVAFSS00       SD
RAALTD11        AM
RKEVEXT0       CO-PA
Hope this helps u
thanks and regards
suma sailaja pvn

What does the field "Version of the Reporting Component" in the table RSZC

Hi Experts,
Was wondering if any of you have the answer to the following:
The table RSZCOMPDIR stores details of the queries.
Now the field "Version of the Reporting Component" in this table contains many different values viz. 0, 11, 13, 15, 100, 101, 102 etc.)
However, am not sure if this field denotes the object type....for e.g. bot calculated & restricted key figues may have version 15 etc.
So, in a nutshell, what does the field "Version of the Reporting Component" in the table RSZCOMPDIR signify?
Thanks,
Bala

I have not seen this done for CVI but I believe for all Microsoft functions such as this you would use ActiveX to call the Word, Excel, and possibly powerpoint ActiveX classes.
Ian M.
National Instruments

What does the word Factory mean in "naming factory "

What does the word Factory mean in "naming factory" in JNDI tech?

A Factory class is a class that produces an instance of an object. For example, a ParserFactory class will have a method that returns a Parser. Usually this Factory class is looking at something in the environment to decide which object to return. "Factory" is just one of many "Design Patterns" that you will encounter in the programming world. Several (many?) books have been written about design patterns.

What does the function skgesig_sigactionHandler() do?

Hello,
OS: RHEL 5.3
OCCI: 11gR1 (11.1.0.7.0)
From 11gR1, when a signal is received to my app, the function skgesig_sigactionHandler() is called.
using namespace oracle::occi;
int main()
Environment* env = Environment::createEnvironment(oracle::occi::Environment::Mode(oracle::occi::Environment::THREADED_MUTEXED|oracle::occi::Environment::OBJECT));
abort(); // abort intentionally
return 0;
(gdb) where
#0 0x00000035b86306a7 in kill () from /lib64/libc.so.6
#1 0x00002ba942a26317 in skgdbgcra () from /opt/oracle11/lib/libclntsh.so.11.1
#2 0x00002ba942a231f2 in skgesigCrash () from /opt/oracle11/lib/libclntsh.so.11.1
#3 0x00002ba942a233f1 in skgesig_sigactionHandler () from /opt/oracle11/lib/libclntsh.so.11.1
#4 <signal handler called>
#5 0x00000035b8630215 in raise () from /lib64/libc.so.6
#6 0x00000035b8631cc0 in abort () from /lib64/libc.so.6
#7 0x0000000000400f94 in main (argc=1, argv=0x7fff6a01d8a8) at test.cpp:126
What does the function skgesig_sigactionHandler() do?
If anyone knows it, please let me know.
My app uses sigaction() for signal handling. So, I'm afraid of that my app will not work correctly.
Any info, I will appreciate it.
Thanks.
Yoshitaka Egawa

My apologies for my posting 3 threads of same contents.
Please reply against the thread not yet answered.
Thanks.
Yoshitaka Egawa

What does the DBA need to do to grant privileges so I can CREATE DIRECTORY

Hello,
What does the DBA need to do in order to grant privileges to:
CREATE OR REPLACE DIRECTORY douglas_my_files as 'C:\Documents and Settings';
This is what SQL Navigator says:
[1]: (Error): ORA-01031: insufficient privileges
Thanks
Doug

Also, note that a directory object can only point to a directory on the database server, not on your client machine... Unless you have your own My Documents folder on the database, which would be a tad unusual, this probably won't work regardless of the permissions your DBA gives you.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

What does the word "static" really mean?

Yep, that's the question. What does the word "static" really mean?
/Martin

hi static means that u can use it with out creating an object of this class
i.e. Class.Staticmethod()
e.g. Math.pow(7,2)
non static means u hava to create an object to use it
like ClassObject.method()
and remember it doesn't fit only for methods it fits for all members of a class i.e. methods and variables

I was playing with my ipad settings (it's an older model) and noted in the advanced settings of Safari there was a place to view website databases. When I clicked on this I saw websites. How do these get there and what does the space amount mean?

I was playing with my ipad settings and noted in he advanced settings of Safari there was a place to view "website databases". When I selected this I saw a multitude of websites.
Can anyone tell me how these get there? Can a website be posted even if it was never went to? What does the space amount mean? For example, 1.5 kb...is this quite a bit? Would it indicate someone has gone to a site multiple times?
I share my ipad with my teenage daughter and I'm trying to find out if she's lying to me. Obviously she's swearing that she has "no idea" how these got there and I'm trying to keep her safe (she's only 14).
Thanks everyone.
Concerned Mom

Think of your PC and the 'temporary internet folder' where it keeps cached copies of web pages or elements off a web page for 'quicker display the next time you visit'. That's pretty much what that folder is. 1.5K is tiny. Probably just a basic page with some text on it. (you might be confusing 1.5K with 1.5 megabyte....megabyte is large...it's roughly 1000 kilobytes, so the 1.5K is a tiny file)
As far as I know, the only way info gets into that folder is if the browser has been to that site.
if you have a concern there are browsers out there, McGruff is one i've seen recommended, that allow some degree of parental control and supervision. That or you could passcode lock the iPad or enable the restrictions to turn off some parts of the device to have some control.

What does the open file dialog do 'under the hood' and is there a way to simulate it

What does the open file dialog do 'under the hood' and is there a way to simulate it?
I have a bug in my code (that I've posted about before, here) which I can't fix at the moment, but I do have a workaround.
Briefly, the bug:
I call a dll from a function node, to initialise and run a spectrometer. If I start up the PC, LabVIEW and run my vi the code runs without complaint, the first call to the dll to initialise the spectrometer doesn;t return an error but the spectrometer is not detected either.
I've tried various solutions, see the link above, and none work
The workaround:
If, at any time before running the code containing the function node I open an 'open file' dialog window, select the dll and click ok/hit enter then everything is fine. When I run the main code the spectrometer is detected.
I use an express vi to open the file dialog, I specify the start path and file name as constant inputs and just click ok/hit return when the dialog pops up. I don't do anything with the dialog outputs. In fact the vi that contains the open file dialog can be run before the project containing the bug is even open.
I have to do this everytime I turn the PC on.
So, either
1) Can somewone suggest a fix for the original bug?
2) What is the easiest way to simulate the enter keypress when the open file dialog pops up
or
3) Can someone tell me what the open file dialog does under the hood that somehow causes the dll to work and can it be simulated in straight LabVIEW
I suspect that the dll itself is dodgy ( I have in the past talked to the supplier but not got very far, and I will try again but I would like a quick, temporary solution too). I'm guessing that the file dialog is making some kind of check on the file, and possibly registering its presence with the OS (winXP). I tried using the file/folder exists vi to see if checking the file like that worked but no luck.
Any help greatly appreciated.
Dave

Hi David
I am very conscious about thread hijacking but this sounded like my issue so I hope you dont mind me asking about your issue. I am hoping that you have a spectrometer from the same vendor as me and its not just me seeing an Error 1097 issue. My spectrometer is from a company called Stellarnet.
So far I have unable to get it to work with other VIs. There is one condition where I can get it to work but its no good for me.
Case 1
I open the VI in a fresh labview environment with no other VIs in memory. The code runs with no issue.
Case 2
Labview is not opened. I double click the spectrometer VI in windows explorer. The VI opens but it fails to run resulting in Error 1097. Personally, I dont see the difference between this and Case 1 above and yet it fails.
Case 3
If I already have other VI's in memory and try to load the spectrometer VI and run it fails with Error 1097. This case is the one that most important to me. I have a test executive that will load test VIs dynamically and I can't get this to work. Same problem Error 1097.
I wanted to share what I have seen with you and to let you know that maybe somebody else has the same issue. I am convinced its the DLL but the vendor dis-agreed saying it was LabVIEW. I couldn't convince him otherwise.
Thanks in advance
David

EJB QL-What does the Object keyword in select clause do ?

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