Ejb QL 3.0 group by / return type issues

Hello all. I have a question regarding ejb query language 3.0. I have a query that works and looks like the following:
select e.objectId, count(distinct s1.objectId), count(distinct s2.objectId)
from Engagement e JOIN e.surveys s1 JOIN e.surveys s2
where s2.scope is not null
and s2.schedule is not null
and s2.quality is not null
and s2.expertise is not null
and s2.overallExperience is not null
group by e.objectId
While this query "works" I am unhappy with the result. What is returned by this query is an Object array of size 3. The first element is the objectId, the second the count of "sent surveys" and the third the count of "completed surveys". While this is correct for the query i want to execute a query selecting out an actual engagement object, not just the objectId. To accomplish this now, I would have to manually select out every column in engagement growing my Object array to n + 2 where n is the number of columns in Engagement. I find this unreasonable and not object oriented and would like to get an object array back that contains an Engagement object as the first element, and then the counts. However I am unaware of how to write this in ejb QL. If anyone has more experience than me please let me know if this is possible. The following code is incorrect but represents what I want to do:
select e, count(distinct s1.objectId), count(distinct s2.objectId)
from Engagement e JOIN e.surveys s1 JOIN e.surveys s2
where s2.scope is not null
and s2.schedule is not null
and s2.quality is not null
and s2.expertise is not null
and s2.overallExperience is not null
group by e /* alternatively 'group by e.objectId' or something of the like */
For anyone else having trouble with ejb QL the best resource I have found is the BNF grammar on suns site. If you are trying to do anything complex, chances are there isn't an example out for you :(
http://java.sun.com/javaee/5/docs/tutorial/doc/bnbuf.html#bnbui

I realized what I wanted to the QL to do wasn't really fair. I was thinking if you wanted to do something like the above it could automatically group by first whatever the pk is on the entity and then who cares what order is next, just pick something so the SQL group by is satisfied. After more thought I realized this wasn't really a fair assumption the query engine could make and went about coding the specific items I wanted back in the select and made a corresponding entity object that acutely defined my result and used a constructor expression to create a list of these new objects. Hopefully someone else finds this useful and I appreciate the above response as well. Marking as answered.

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Flex services with multiple return types

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Hello Micheal,
While Creating a method in front of the return type click on the browse and select Java Native Type Radio Button and again click on the browse button available there. Type the name of the class in the class in it and you can select the return type. If it is a user made class then first the required Java files under the path Resources>src>packages><create a folder>java file. Then build the project so that the class name is visible in list while selecting the return type.
Regards,
Ardhendu

Multiple Return Types

haven't been around in a while, so I thought I'd stir up some comments with a suggestion for a new feature in Java, which I'm sure has been suggested at some point, but I can't remember seeing it talked about, so here goes:
Multiple Return Types:
public String, int getStateInfo(String abbrev) {
   if("nj".equalsIgnoreCase(abbrev)) {
      return "New Jersey", 11408042;
   // ... and other states...
   return null, -1;
String name, int population = getStateInfo("nj");
System.out.println("The population of " + name + " is " + population + ".");Yes yes, I know. Create a StateInfo object with the fields needed. Still, I think that could be interesting.

apart from it getting ugly with more than twoparameters
What? How is this ugly? ;-)
public String, int, String, Color, String, String
getStateInfo(String abbrev) {
return name, population, stateFlower, stateColor,
or, stateAnimal, governorsName;
there no indication on what the return valuesrepresent.
Well, I guees the API docs would have to speak for
themselves. Or better method naming... In that
sense, it's no different then now. I could write a
method "getStateName()" and return totally different.
public String, int getStateNameAndPopulation(String
abbrev) {...
I used to like "tuples" when I studied The Tom Programming Language (that's how he calls them), as every CS student is a bit of a "featurist"... Now that I came to develop 40 hours a week and to love Java's simple and powerful expressiveness, I tend to find such constructs overly ugly to be avoided as possible... a matter of personal taste, too, I suppose...

How to set required for group of condition type in the same condition class

Hello,
we have a group of condition type with the same condition class B, the last one have been set, and all of others will be inactive.
but we don't set any required for all the condition types in pricing control, so if user don't set any of them, the sales order or billing is still saved. that is a risk.How can i fix it? Thanks.
Sophie

Hello,
incompletion log is not available in invoices.
You have different options:
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- define a subtotal in the pricing procedure as sum of the pricing conditions of your group, then develop a custom routine to be assigned in the formula "CalType" (field T683S-KOFRM) where an error should be raised if the amount of the subtotal is zero (use as an example formula 48);
Best regards,
Andrea

Creation of Group for Order type

Dear All,
I have created the stage wise order
types ,now I am trying to create a group for each order
type, while doing this I maintained text &
no.range for the same,
but system is not creating new group,
it replaced the existing group.(OPJH )
please guide me to solve this difficulty
Thanks in advance
Rgds,
Vijay Mankar

Hi Vijay,
1. To create a new group "F6" now type the description and the number interval. Now hit enter. New group is created
2. You need to select the new Number Range Group by selecting the check box on the left side of the group.
3. Place your cursor on the Order type decsription and use "F2" to select the line.
4. Now you need to hit the "Element/Group" icon or F5 in key board to assign the order type to the number range group.
Save the changes now. Number ranges are generally not transported, so you need to do this directly in the client where it is needed.
Hope this steps will help you in understanding how this has to be done. Reward your points,
Regards,
Prasobh

How can I get rid of a type generated by the Data/Services return type wizard?

Hi All,
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However, this caused over a hundred errors to show up inside the generated classes, "Call to a possibly undefined method Error." That's because of lines like this:
throw new Error(propertyName + " is not a data property of entity Agreements");
It's trying to throw a regular "Error" object, but now that there's an "Error" class in the same package, that is taking precedence--and that Error object doesn't have a constructor with a single parameter. At least, that's what I think is going on.
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I then changed my JSON service so that it returns an object called "serviceError" instead of just "error".
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In the "Configure Return Type" wizard I very carefully inspected the type of every bit of data coming back to make sure none of them show up as type "Error." And they don't (as expected, since I changed the object's name to serviceError--now the type of that object is ServiceError.
-Josh

I think you are facing this known issue https://bugs.adobe.com/jira/browse/FB-29770
Please vote it.
Thanks for the link--I just voted for it.
To avoid this, in the last page of "Configure Return Type", edit return type name to something else (You can also edit subnodes's name too in the wizard).
Actually, that's exactly what I saw doing; I apologize if that wasn't clear in my post.
I closed and restarted Flash Builder, and once I did that Flash Builder stopped generating the Error class. My guess is that the FML file, even though I had updated it (by deleting all references to the Error class), was cached in some fashion by Flash Builder, and restarting Flash Builder forced it to reread the FML file?
Additional point of clarification: my understanding is that the FML file stores all the metadata about the services that Flash Builder has been able to figure out so far, and when you run the Configure Return Type wizard, it will regenerate *every* type in the FML file, even if that type is not mentioned anywhere in the particular return value that you are working with.
Edited to provide additional thoughts on FML file.

Problem when calling a return type BOOLEAN SQL Function in a package

Hi All,
I am having problem when trying to call a SQL function in a package with return type BOOLEAN
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CREATE OR REPLACE PACKAGE RMSOWNER.ORDER_ATTRIB_SQL ****
FUNCTION GET_PO_TYPE_DESC(O_error_message IN OUT VARCHAR2,
I_PO_TYPE       IN     VARCHAR2,
O_PO_TYPE_DESC IN OUT VARCHAR2)
RETURN BOOLEAN;
Following is my java code
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I get the following exception, i tried changing the sql type(registerOutParameter) from boolean to bit but i still getting this exception.
But when i call any other functions with return type other than boolean they work perfectly fine.
Please can anyone help me fix this issue, i am not sure if its anything to do with vendor JDBC classes?
+java.sql.SQLException: ORA-06550: line 1, column 13:+
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+     at oracle.jdbc.driver.T4CCallableStatement.doOall8(T4CCallableStatement.java:215)+
+     at oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:954)+
+     at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1168)+
+     at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3316)+
+     at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3422)+
+     at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:4394)+
#####

Hello People!
There is another workaround!!
See the example below:
private String callBooleanAPi(String tableName,String apikey,String dtInicio,String dtFim,String comando) throws SQLException {
               CallableStatement cs = null;
               String call = "";
               String retorno = null;
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                         call = "declare x BOOLEAN; y varchar2(2);begin x :=PKG.INSERT(?,?,?,?,?); if x then y := 'S'; else y :='N'; end if; ? := y;end;";
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                    java.util.Date dataInicialVigencia =null;
                    java.util.Date dataFinalVigencia = null;
                    Date dtInicialFormatada =null;
                    Date dtFinalFormatada = null;
                    if(dtInicio != null && !dtInicio.equals("")){
                         dataInicialVigencia = sdf.parse(dtInicio);
                         dtInicio =sdfToSqlDate.format(dataInicialVigencia);
                         dtInicialFormatada = Date.valueOf(dtInicio);
                    if(dtFim != null && !dtFim.equals("")){
                         dataFinalVigencia = sdf.parse(dtFim);
                         dtFim =sdfToSqlDate.format(dataFinalVigencia);
                         dtFinalFormatada = Date.valueOf(dtFim);
                    cs.setString(1, tableName);
cs.setString(2, apikey);
cs.setDate(3, dtInicialFormatada );
cs.setDate(4, dtFinalFormatada );
cs.registerOutParameter(5, java.sql.Types.VARCHAR);
cs.registerOutParameter(6, java.sql.Types.VARCHAR );
cs.execute();
                    retorno = cs.getString(6);
                    System.out.println( cs.getString(5));
               } catch(SQLException e){
               throw new SQLException("An SQL error ocurred while calling the API COR_VIGENCIA: " + e);
               } catch(Exception e){
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               } finally {
               if (cs != null) {
               cs.close();
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As you can see the CallableStatement class acepts PL/SQl blocks.
Best Regards.

LSO- Course Groups and Course Types are not displayed in Spanish

We are having issues with the
data like Course Groups and Course Types not being displayed in
Spanish on the Learning Iview.
The Data in the Course Catalog is loaded in Spanish and
English and I can see the Course Catalog in Spanish when logging on in Spanish in the back end.
SAP asked us to apply few notes as below
#1247020 OTR: Texts are not transported
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We have applied the above as well and we had no solution.
However the Problem is NOT related to Texts/Labels as these are displayed in Spanish.
The Problem is related to the data like Course Groups and Course types not being displayed in Spanish in the front end.
SAP also came up with the below which did not help either.
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Is this production or is this in a development system? The dropdown displayed comes from the standard tables. If it's working in development system and not in production, then the chances are higher that the translation didn't go through.

Should Collections be used as return types across threads?

I am wondering when, if ever, it is appropriate to use a Collection as the return type of a method in a multi-threaded environment. Here is our situation:
We have four classes -- Widget, WidgetManager, ClientA, and ClientB. ClientA and ClientB are running in different Threads from each other and from the WidgetManager.
The WidgetManager class that uses a Collection of Widgets internally, and passes the Collection (or an Iterator over it) out as a return value of a method to ClientA, which is running in another thread. ClientA would start to go through it using next() and hasNext() of the Iterator. If the WidgetManager were to get a request from ClientB running in another thread to eliminate a Widget, it would attempt to remove it from the Collection. If ClientA were still looping through the Iterator, this would throw an IllegalStateException b/c the system would be in an inconsistent state. The Iterator given to the ClientA is directly linked to the actual Collection in the WidgetManager (am I right so far?).
In my opinion, in most cases we don't want to synchronize Collections. In the example above, if we had passed out a synchronized Collection, then the WidgetManager couldn't touch the collection while the client was looping through the Iterator. If the client got hung up while looping, then the WidgetManager would be hung up. In this case, I think that it will be better to use the toArray() method of Collection to just dump out the contents to a plain array of Objects. Actually, the WidgetManager could convert this array of Objects to an array of Widgets before passing it out, which would give us the type checking that we don't get with Containers.
The condition where you would want to use a synchronized Collection would be when you actually want the client to do some writing or removing from the Collection. I would expect this to be pretty rare since you usually dont want to give clients access to an interal member (the Collection) of a class.
I think that it is also possible to have read-only Collections, but I think (don't know for sure) that you would still have the same IllegalStateException or synchronization probelms.
Can someone point out the errors in my thinking? Or should you generally only use Collections as internal members in a multi-threaded environment, and use toArray() whenever you want to pass the Collection's data outside of the class?
Thanks for any help.
Keith

I haven't tested what happens when you synchronize the
Collection, but I think that you are right. But this
causes the problem that I mentioned in the first post.
That is, what happens if your client STARTS running
through the Iterator, and then stops or gets hung up
for some reason? I assume that you're still blocked.
And it's pretty important to me in this case to not
t be blocked -- WidgetManager is the highest level
class in the system.
I'd like to know if anyone has tested this.
The Iterator implementations used in java.util do not use any synchronization by itself, (which is what you would expect since synchronization over multiple method call will involve much more complications and slower performance) . With iterator, you have to provide the necessary synchronization yourself to maintain thread-safety like this
Iterator itr = get Iterator from collectionInstance ;
synchronized(collectionInstance) {
while(itr.hasNext())
process itr.next() ...
As long as your client code gracefully exits the synchronized block on a stop( or hangup, given that it is detected and handled fast enough), it will not be a problem.
Also, I'd like an example of when you WOULD want to
return a Collection. I'm specifically interested in
when you would want to return one in a multi-threaded
environment, but I'm beginning to wonder when you
would EVER want to return one from a method.
Collections are great for internal uses, but you lose
type-checking and you expose the internals of your
class to modification when you use them as return
types. And if you're returning a read-only
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Two methods with same name but different return type?

Can I have two methods with same name but different return type in Java? I used to do this in C++ (method overloading or function overloading)
Here is my code:
import java.io.*;
public class Test{
public static void main(String ar[]){
try{
//I give an invalid file name to throw IO error.
File file = new File("c:/invalid file name becasue of spaces");
FileWriter writer = new FileWriter(file ,true);
writer.write("Test");
writer.close();
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//call second method - returns stack trace as string
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     e.printStackTrace(pw);
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     IOe.printStackTrace();
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}//end of first showerr
public static String showerr(Exception e){
     StringWriter sw = new StringWriter();
     PrintWriter pw = new PrintWriter(sw);
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     try{
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}//end of second showerr
} // end of class
[\code]

Overloading is when you have multiple methods that have the same name and the same return type but take different parameters. See example
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}Make sense ???
Regards,

The class of the deferred-methods return type "{0}" can not be found.

I am developing a multilingual portal application.
I have the method that changes the locale based on user's choice in the bean and the method is being referred to as below.
<af:selectOneChoice label="Select Language" autoSubmit="true"
value="#{localeBean.locale}"
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<af:selectItem label="English" value="en" id="si1"/>
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when i try to run the application, i am getting compile time errors as below,
The class of the deferred-methods return type "{0}" can not be found.
No property editor found for the bean "javax.el.MethodExpression".
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Even after that i am getting the compilation error.
Any solutions, suggestions or possible approaches would be helpful as i am new to Webcenter Portal development.
Thanks,

The error you get points to a problem on the page (somewhere). Switch to source mode and check the right margin if you see orange or red marks. These are pointing to problems (not all are show stoppers, but they give you hints that something is not according to the standard for jsf, jsff, jsp or jspx pages.
Have you checked that the bean is correctly defined and that it's reachable?
Start a fresh page and isolate the problem, e.g. build a selectOneChoiuce on the new page (don't copy it as you might copy the error too) and make it work on the new page. Once you have it running you can compare the solution to your not running page.
Timo

How to add User defined return type in service interface of AppModule

HI All,
I am creating service interface using AppModule. Added custom method with Java primitives and working fine. Now i want to added custom method with return type is EMP object means user defined object. How can i do so?
Thanks in advance.

I looked it up in the mean time ...
The docs state that you only can use simple data type or java.util.list or AttributeList (which is a wrapper for any viewRow). So I guess you have to somehow flatten your complex data type or create a custom VO which holds it.
http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/bcextservices.htm#CJAEHFJD
Scroll down to 11.2.3
Timo

Data Service Wizard - How can I reconfigure return type field as XML (E4X) value

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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ListOfUsers version="1.0.0">
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package services.listeningpost
public class User_type extends _Super_User_type
public function get xmlSettings():XML
return new XML(settings);
public function set xmlSettings(object:XML):void
settings = object.toXMLString();

Developers Help me on return type

Can we have two returns in a single method. Also can we have any executable statement after return.
Thanks in advance.Clearing the doubt is graetly appreciated

hi,
can you explain your problem clearly ?
If you want to return many things (objects) in a single method, you can put them in a structure like a vector the return the vector. But if your return type is single and depends on a condition your code could be like that :
if(condition == true)
return object_1;
else
return object_2;
hth,

Ejb QL 3.0 group by / return type issues

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