UML notation: Class operation return value multiplicity

Hallo,
how would you write function from example below using UML notation on implementation level, please:
class Coin {
public String[] getSideNames() {
return new String{ "Odd", "Even" };
}Multiplicity in return value is troubling me. I've tried +getSideNames( ) : String [ 2 ] but my tool just created new class named "String[2]" :-( To be precise I know that return value of function is array of MyClass with one or more element (1..*) so created class name was "MyClass[1..*]" -- nasty name to pass to javac isn't it? :-)
Is is possible to write multiplicity of return value this way? I couldn't find anything in omg's "UML: supertructure document" :-( I am not telling that it's not written there :-)))
Thank You.

jschell>
Unfortunately [n] behaves in same fashion as [*] =>
creating class named MyClass[1..n]" :-(
duffymo> what's the point?
this was only sample, real application is far more
complex than that. Even "nature" of result was just
made up. How am I or anyone else who responds supposed to know that?
>
duffymo> you can have cardinality in a class diagram
that shows exactly two values are available.
yup, i ended like that but there's still problem coz
return value class is "Object[]" :-(Sounds like a bad design, but I haven't seen the code, so I can't tell.
duffymo> personally, i don't think that exposing the
side names as ...
"side names" were just example :-) IMHO there are
certain situations where one could say "screw the
abstraction" :-D E.g. for final classes from one
package that cooperate on single time critical task.
:)"screw the abstraction" - good luck as an object-oriented designer with that attitude.
Either you're doing real-time work where time really is critical, or you're just another yutz who is congratulating himself on recognizing a time critical task without doing profiling or getting any real data. (A common mistake.) The maintainence and development time might be more critical here.
Gotta admit that I'm not much interested in commenting on your poor approximation of the real problem.
%

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Hello SCN,
I am having a problem with a Client Initiated HWC application.
The application has 1 MBO which has an Operation attached to it.
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Once the user has viewed the details of the PR he can then click a button to take him to the Operation which is a SAP standard Release BAPI.
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Hi Jared,
Instead of attaching the operation
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Please:How to repeat the return values multiple times in sapscript

Currently my subroutine is returning a value called TOQBSSHB single time and i am working with standard layout called RFFOUS_C.Please can anybody tell me if i want to show multiple times TOQBSSHB for different values of VBLNR .Is it possible if it is what are changes i should make on layout and subroutine.
PERFORM EXTRACT IN PROGRAM Y_MIT_TEST2
USING &REGUH-VBLNR&
USING &REGUH-NAME1&
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I said :
- A) you should copy the main program without to copy
     includes, so when the systems ask you which objects
     you want to copy: check all excluding INCLUDES.
So you'll have a new program which uses the same includes of the standard program.
- B) in your z-program you find the point where you should insert your code: you'll have two cases:
- you should insert code in a point that is writen in z-program;
- you should insert code in a point (for example a form) that isn't write in z-program, but in a standard include your z-program use.
In first case you only write your code, in second one before you should copy the include, than insert it in your z-program and so insert your code in the include.
For example:
- A) Copy RFFOUS_C in ZRFFOUS_C
- B) I should change the code of routine
     SCHECKDATEN_EINGABE, it's defined in RFFORI01, so I copy it in ZRFFORI01, insert my code in it.
- C) found where my z-program call include RFFORI01:
subroutines for check print and prenumbered checks                  *
INCLUDE RFFORI01.
now replace this with the call to my new include:
INCLUDE RFFORI01.
INCLUDE ZRFFORI01.
If you do in this way you copy only includes where you should change the code.
Message was edited by: max bianchi
Message was edited by: max bianchi

Multiple return values (Bug-ID 4222792)

I had exactly the same request for the same 3 reasons: strong type safety and code correctness verification at compile-time, code readability and ease of mantenance, performance.
Here is what Sun replied to me:
Autoboxing and varargs are provided as part of
JSRs 14 and 201
http://jcp.org/en/jsr/detail?id=14
http://jcp.org/en/jsr/detail?id=201
See also:
http://forum.java.sun.com/forum.jsp?forum=316
http://developer.java.sun.com/developer/earlyAccess/adding_generics/index.html
Multiple return values is covered by Bug-ID 4222792
Typically this is done by returning an array.
http://developer.java.sun.com/developer/bugParade/bugs/4222792.html
That's exactly the problem: we dynamically create instances of array objects that would better fit well within the operand stack without stressing the garbage collector with temporary Array object instances (and with their backing store: 2 separate allocations that need to be recycled when it is clearly a pollution that the operand stack would clean up more efficiently)
If you would like to engage in a discussion with the Java Language developers, the Generics forum would be a better place:
http://forum.java.sun.com/forum.jsp?forum=316
I know that (my report was already refering to the JSR for language extension) Generics is not what I was refering to (even if a generic could handle multiple return values, it would still be an allocated Object
instance to pack them, i.e. just less convenient than using a static class for type safety.
The most common case of multiple return values involve values that have known static datatypes and that should be checked with strong typesafety.
The simple case that involves returning two ints then will require at least two object instances and will not solve the garbage collection overhead.
Using a array of variable objects is exactly similar, except that it requires two instances for the components and one instance for the generic array container. Using extra method parameters with Integer, Byte, ... boxing objects is more efficient, but for now the only practical solution (which causes the least pollution in the VM allocator and garbage collector) is to use a custom class to store the return values in a single instance.
This is not natural, and needlessly complexifies many interfaces.
So to avoid this pollution, some solutions are used such as packing two ints into a long and returning a long, depacking the long after return (not quite clean but still much faster at run-time for methods that need to be used with high frequencies within the application. In some case, the only way to cut down the overhead is to inline methods within the caller code, and this does not help code maintenance by splitting the implementation into small methods (something that C++ can do very easily, both because it supports native types parameters by reference, and because it also supports inline methods).
Finally, suppose we don't want to use tricky code, difficult to maintain, then we'll have to use boxing Object types to allow passing arguments by reference. Shamely boxed native types cannot be allocated on the operand stack as local variables, so we need to instanciate these local variables before call, and we loose the capacity to track the cases where these local variables are not really initialized by an effective call to the method that will assign them. This does not help debugging, and is against the concept of a strongly typed language like Java should be:
Java makes lots of efforts to track uninitialized variables, but has no way to determine if an already instanciated Object instance refered in a local variable has effectively received an effective assignment because only the instanciation is kept. A typical code will then need to be written like this:
Integer a = null;
Integer b = null;
if (some condition) {
//call.method(a, b, 0, 1, "dummy input arg");
// the method is supposed to have assigned a value to a and b,
// but can't if a and b have not been instanciated, so we perform:
call.method(a = new Integer(), b = new Integer(), 0, 1, "dummy input
arg");
// we must suppose that the method has modified (not initialized!)
the value
// of a and b instances.
now.use(a.value(), b.value())
// are we sure here that a and b have received a value????
// the code may be detected at run-time (a null exception)
// or completely undetected (the method() above was called but it
// forgot to assign a value to its referenced objects a and b, in which
// case we are calling in fact: now.use(0, 0); with the default values
// or a and b, assigned when they were instanciated)
Very tricky... Hard to debug. It would be much simpler if we just used:
int a;
int b;
if (some condition) {
(a, b) = call.method(0, 1, "dummy input arg");
now.use(a, b);
The compiler would immediately detect the case where a and b are in fact not always initialized (possible use bere initialization), and the first invoked call.method() would not have to check if its arguments are not null, it would not compile if it forgets to return two values in some code path...
There's no need to provide extra boxing objects in the source as well as at run-time, and there's no stress added to the VM allocator or garbage collector simply because return values are only allocated on the perand stack by the caller, directly instanciated within the callee which MUST (checked at compile-time) create such instances by using the return statement to instanciate them, and the caller now just needs to use directly the variables which were referenced before call (here a and b). Clean and mean. And it allows strong typechecking as well (so this is a real help for programmers.
Note that the signature of the method() above is:
class call {
(int, int) method(int, int, String) { ... }
id est:
class "call", member name "method", member type "(IILjava.lang.string;)II"
This last signature means that the method can only be called by returning the value into a pair of variables of type int, or using the return value as a pair of actual arguments for another method call such as:
call.method(call.method("dummy input arg"), "other dummy input arg")
This is strongly typed and convenient to write and debug and very efficient at run-time...

Can anyone give me some real-world examples where
multiple return values aren't better captured in a
class that logically groups those values? I can of
course give hundreds of examples for why it's better
to capture method arguments as multiple values instead
of as one "logical object", but whenever I've hankered
for multiple return values, I end up rethinking my
strategy and rewriting my code to be better Object
Oriented.I'd personally say you're usually right. There's almost always a O-O way of avoiding the situation.
Sometimes though, you really do just want to return "two ints" from a function. There's no logical object you can think of to put them in. So you end up polluting the namespace:
public class MyUsefulClass {
public TwoInts calculateSomething(int a, int b, int c) {
public static class TwoInts {
    //now, do I use two public int fields here, making it
    //in essence a struct?
   //or do I make my two ints private & final, which
   //requires a constructor & two getters?
//and while I'm at it, is it worth implementing
//equals(), how about hashCode()? clone()?
//readResolve() ?
}The answer to most of the questions for something as simple as "TwoInts" is usually "no: its not worth implementing those methods", but I still have to think about them.
More to the point, the TwoInts class looks so ugly polluting the top level namespace like that, MyUsefulClass.TwoInts is public, that I don't think I've ever actually created that class. I always find some way to avoid it, even if the workaround is just as ugly.
For myself, I'd like to see some simple pass-by-value "Tuple" type. My fear is it'd be abused as a way for lazy programmers to avoid creating objects when they should have a logical type for readability & maintainability.
Anyone who has maintained code where someone has passed in all their arguments as (mutable!) Maps, Collections and/or Arrays and "returned" values by mutating those structures knows what a nightmare it can be. Which I suppose is an argument that cuts both ways: on the one hand you can say: "why add Tuples which would be another easy thing to abuse", on the other: "why not add Tuples, given Arrays and the Collections framework already allow bad programmers to produce unmainable mush. One more feature isn't going to make a difference either way".
Ho hum.

Function return value == -10. Native error code -2146824584 ADOBD.Recordset: Operation is not allowed when object is closed

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Operations Manager Installation Error - Return Value 3

Hello, I am having issues installing Operations Manager Reporting 2007 R2. The installation hangs with no status update a little more then midway through. I am receiving the following exception below. I am trying to install this on a named reporting instance.
013-12-16T16:00:00.0547063-08:00 Debug:
*** Trace Started ***
2013-12-16T16:00:00.0859563-08:00 Debug:
ConfigureOverridesForDWRules: Root Management Server is: CORP32-VS
2013-12-16T16:30:01.7422063-08:00 Error:
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Exception thrown by custom action:
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at Microsoft.WindowsInstaller.SessionProperties.set_Item(String name, String value)
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--- End of inner exception stack trace ---
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture)
at Microsoft.WindowsInstaller.CustomActionProxy.InvokeCustomAction(Int32 sessionHandle, String entryPoint)
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Niki,
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12/18/2013 07:43:28,spid177,Unknown,Error 777970008<c/> severity 16<c/> state 1 was raised<c/> but no message with that error number was found in sys.messages. If error is larger than 50000<c/> make sure the user-defined message is
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12/18/2013 07:43:28,spid177,Unknown,Error: 18054<c/> Severity: 16<c/> State: 1.
12/18/2013 07:43:28,spid88,Unknown,Error 777970008<c/> severity 16<c/> state 1 was raised<c/> but no message with that error number was found in sys.messages. If error is larger than 50000<c/> make sure the user-defined message is added
using sp_addmessage.
12/18/2013 07:43:28,spid88,Unknown,Error: 18054<c/> Severity: 16<c/> State: 1.
12/18/2013 07:43:28,spid173,Unknown,Error 777970008<c/> severity 16<c/> state 1 was raised<c/> but no message with that error number was found in sys.messages. If error is larger than 50000<c/> make sure the user-defined message is added
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12/18/2013 07:43:28,spid173,Unknown,Error: 18054<c/> Severity: 16<c/> State: 1.
12/18/2013 07:43:18,spid173,Unknown,Error 777970008<c/> severity 16<c/> state 1 was raised<c/> but no message with that error number was found in sys.messages. If error is larger than 50000<c/> make sure the user-defined message is added
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Hi all!
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I make a project which very similar to Product project(in
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package flex.samples.stock;
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import java.util.Collection;
import java.util.Map;
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some require class is ok.
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Hi,
The executeQueryAsync method is “asynchronous, which means that the code will continue to be executed without waiting for the server to
respond”.
From the error message “The collection has not been initialized”, which suggests that the object in use hadn’t been initialized after the execution of the executeQueryAsync method.
I suggest you debug the code in browser to see which line of code will throw this error, then you can reorganize the logic of the code to avoid using the uninitialized object.
A documentation from MSDN about Using the F12 Developer Tools to Debug JavaScript Errors
for your reference:
http://msdn.microsoft.com/en-us/library/ie/gg699336(v=vs.85).aspx
Best regards
Patrick Liang
TechNet Community Support

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How to pass a function with the same argument multiple times and return values in variables?

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I tried to overwriting *a* to process the second field
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Can I use a function as a batch processing tool that way?

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is it
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Hi All
thanks for your responses
I have Created a control item and assigned the return value of the LOV to the control item
and i have assigned the LOV to the text item that i want
Currently when i navigate to the text item the LOV is visible
but when i select a value from the LOV the value is not getting populated into the text item
I have assigned the value of the control item to the text item
but i am not sure in which trigger to write the code so as when i select the value from the LOV the value should be shown on the form populating in the text item
Thanks

LOV problem with multiple return values.

I created a ViewObject and in it a transient attribute.
I create a ViewAccessor for another field and a LOV for it (default InputText with Lov Value).
In List Return Values I added also my tranient attribute in order to receive another attribute from the accesor VO.
When I run it from the Application browser I see my transient attribute emtpty even if the "source" attribute is not empty.
If I change the value from the LOV the source value changes bit the transient is still empty.
What's wrong ?
Tks
Tullio

Repost.

Help : Complex parameter and return value in WebService?

Hi guys
   These days, I publish a WebService, in it there is an
operation like this:
   List search(List para);
   in this operation, parameter "para" is a java.util.List, which contains many elements, every element is an instance of customizing class "MyItem", I made "MyItem" implements java.io.Serializable interface. Strangely, when I call this operations in my java client,
I found that I could not get out every element from para in server-side, but para.size() is showing it contains 10 elements in it. The same thing happen to the return value of this operation, in client, I got an instance of java.util.List class as the return value, when I try
System.out.println(result.get(0)); it output "null", but
result.size() is 10, I don't know how to explain this
   Does anyone who encounter this issue too?
I guess it has something to with the Serializable issue ,but I have made every List item serializable, why it looks like this??

Hi Kevin,
I answered you by mail some days ago, but just to complete the thread, I am posting the hint also here:
Custom types should be manually added to the Virtual Interface, so that they can be serialized.
Best regards,
Alexander

Web service return value

I have a web service and I'm cfdumping the return variable, but I don't know how to get the value out. This is what it is giving me.
1
object of com.nextaxiom.www.soapservice.xsd1.APApprovalList
Class Name
com.nextaxiom.www.soapservice.xsd1.APApprovalList
Methods
Method
Return Type
equals(java.lang.Object)
boolean
getAlertDate()
java.lang.String
getDescription()
java.lang.String
getDeserializer(java.lang.String, java.lang.Class, javax.xml.namespace.QName)
org.apache.axis.encoding.Deserializer
getInvoiceAmount()
java.lang.Double
getPaymentReferenceNumber()
java.lang.String
getSerializer(java.lang.String, java.lang.Class, javax.xml.namespace.QName)
org.apache.axis.encoding.Serializer
getTypeDesc()
org.apache.axis.description.TypeDesc
getUserName()
java.lang.String
getVendorName()
java.lang.String
hashCode()
int
setAlertDate(java.lang.String)
void
setDescription(java.lang.String)
void
setInvoiceAmount(java.lang.Double)
void
setPaymentReferenceNumber(java.lang.String)
void
setUserName(java.lang.String)
void
setVendorName(java.lang.String)
void
So some of this is the fields I want, but I want the value: description, alert date, invoice amt, etc. Can anyone help me. What do I need to do next to get the values?
Here is my CF statement and the WSDL file.
thanks for the help,
BJ
Invoke statement
            <cfinvoke
                                         webservice="http://127.0.0.1:8500/APApproval/GetAPApprovalList.wsdl"
                                         method="GetAPApprovalList" refreshwsdl="true"
                                         returnvariable="response">
                                                  <cfinvokeargument name="UserName" value="DAVBRY"/>
                              </cfinvoke>
            <cfoutput>#response#</cfoutput>
WSDL FILE
<?xml version="1.0"?>

<definitions xmlns="http://schemas.xmlsoap.org/wsdl/"
    name="BSAPrototype.APApproval.GetAPApprovalList"
    targetNamespace="http://www.nextaxiom.com/soapservice/BSAPrototype.APApproval.GetAPApprovalList/wsdl"
    xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
    xmlns:tns="http://www.nextaxiom.com/soapservice/BSAPrototype.APApproval.GetAPApprovalList/wsdl"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsd1="http://www.nextaxiom.com/soapservice/xsd1">
    <types>
        <schema xmlns="http://www.w3.org/2001/XMLSchema"
            elementFormDefault="qualified" targetNamespace="http://www.nextaxiom.com/soapservice/xsd1">
            <element name="GetAPApprovalList">
                <complexType>
                    <sequence>
                        <element name="UserName" type="string"/>
                    </sequence>
                </complexType>
            </element>
            <element name="GetAPApprovalListResult">
                <complexType>
                    <sequence>
                        <element maxOccurs="unbounded"
                            name="APApprovalList" type="xsd1:APApprovalList"/>
                    </sequence>
                </complexType>
            </element>
            <complexType name="APApprovalList">
                <sequence>
                    <element minOccurs="0" name="UserName" type="string"/>
                    <element minOccurs="0" name="AlertDate" type="string"/>
                    <element minOccurs="0" name="Description" type="string"/>
                    <element minOccurs="0" name="PaymentReferenceNumber" type="string"/>
                    <element minOccurs="0" name="InvoiceAmount" type="double"/>
                    <element minOccurs="0" name="VendorName" type="string"/>
                </sequence>
            </complexType>
        </schema>
    </types>
    <message name="GetAPApprovalListRequest">
        <part element="xsd1:GetAPApprovalList" name="GetAPApprovalList"/>
    </message>
    <message name="GetAPApprovalListResponse">
        <part element="xsd1:GetAPApprovalListResult" name="GetAPApprovalListResult"/>
    </message>
    <portType name="BSAPrototype.APApproval.GetAPApprovalListSoapPort">
        <operation name="GetAPApprovalList">
            <input message="tns:GetAPApprovalListRequest"/>
            <output message="tns:GetAPApprovalListResponse"/>
        </operation>
    </portType>
    <binding name="BSAPrototype.APApproval.GetAPApprovalListSoapBinding" type="tns:BSAPrototype.APApproval.GetAPApprovalListSoapPort">
        <soap:binding xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
            style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
        <operation name="GetAPApprovalList">
            <soap:operation
                xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" soapAction="urn:doc?in=GetAPApprovalList?out=GetAPApprovalListResult?path=BSAPrototype.AP Approval.GetAPApprovalList"/>
            <input>
                <soap:body use="literal"/>
            </input>
            <output>
                <soap:body use="literal"/>
            </output>
        </operation>
    </binding>
    <service name="BSAPrototype.APApproval.GetAPApprovalList">
        <port
            binding="tns:BSAPrototype.APApproval.GetAPApprovalListSoapBinding" name="BSAPrototype.APApproval.GetAPApprovalListPort">
            <soap:address
                xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" location="http://nextaxb:7777/NXAServer/NextAxiomServer"/>
        </port>
    </service>
</definitions>

Getting complex objects back from web service calls are always tricky - especially when they've been desearialized as an object. We've found its a lot easier to deal with the Raw SOAP messages so at least we're working with an XML document, rather than a series of Getter functions, any of which that may return a NULL value (which does really unpleasant things to a CF variable).
When you absolutely have to deal with a complex non-CF originating object in CF, we've found that you can actually use the underlying Java classes to identify and automatically execute the getter functions to effective dump out the variables. We've rolled it up into a custom tag. The base code for the logic is below:
<cfset objVar = VARIABLE_CONTAINING_OBJECT_FROM_WEB_SERVICE>
<cfset arrMethods = objVar.getClass().getMethods()>
<cfoutput>
<cfif isDefined("arrMethods") AND isArray(arrMethods) AND ArrayLen(arrMethods) gt 0>
<table border="1" cellspacing="0" cellpadding="5" style="border-collapse:collapse;border:1px solid black;">
<tr>
<td colspan="3" style="background-color:##CCCCCC;">RESULT</td>
</tr>
<tr>
<td>Method</td>
<td>Class</td>
<td>Return Value</td>
</tr>
<cfset sComplexMethods = "">
<cfloop from="1" to="#ArrayLen(arrMethods)#" index="iMethod">
<cfset sReturnType = arrMethods[iMethod].getReturnType().toString()>
<cfif ListFindNoCase("int,java.lang.String,class java.lang.String,double,float,char", sReturnType)>
<tr>
<td>#arrMethods[iMethod].getName()#</td>
<td>#sReturnType#</td>
<cfset sReturnValue = EVALUATE("objVar." & arrMethods[iMethod].getName() & "()")>
<td><cfif isDefined("sReturnValue") AND sReturnValue neq "">#sReturnValue#<cfelse> </cfif></td>
</tr>
</cfif>
#sComplexMethods#
</cfloop>
</table>
</cfif>
</cfoutput>

Exporting and returning value question

What is different between exporting and returning value in method of a class. if created an object inside the method and exporting it, it means I have a reference to that object inside program. If I use returning value, it means I have a copy of object created inside the method, but the object inside method is destroyed after it ends. Do I understand correctly? if so what do u prefer exporting or returning value? thanks!

Hello Anthony
The major difference is that you can have multiple EXPORTING parameters yet only a single RETURNING parameter. In addition, if you have a RETURNING parameter you cannot have EXPORTING parameters simultaneously.
Defining methods with a single RETURNING parameter is more Java-like than having multiple EXPORTING parameters.
Whenever possible and sensible I prefer RETURNING parameters over EXPORTING parameters because they allow to use the function method call, e.g.:
go_msglist = cf_reca_messagelist_create( ).
Regards
Uwe

UML notation: Class operation return value multiplicity

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