About Interface variables...

Hello everybody.
I am new to Java so please don't mind if my question looks trivial !
I would like to know why interface variables can be static but interface methods cannot be static ?
regards,
Naveen.

But its still not clear, why Interface variables need to be constants ? Why cant they be assigned values by the implementing classes ? Does it have to do with optimization ?because they were designed to be like that ; if you want fields to be variable, then use abstract class ; a nice example of constants that could be contained in an interface is the value of PI
the value of PI is not supposed to change in the time, and making it variable could lead to really serious problems in the program, if a class alter its value

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Question about Local Variables (Multiple answers welcomed!)

A couple of questions about Local Variables
1. Programmers always say: “Do not abuse of Local Variables”. I’d like to know, when and where Local variable are most efficiently used?
2. If I have to create a couple of local variables, is there anyway to “clone” them without going through the repetitive “create/local variables” mouse click each time? (When I try to copy and paste, it creates a new variables instead of the one that I am trying to reproduce)
3. Which is faster in execution: Updating a variable through a) writing to property node/value or b) through local variable
Everyone’s input is welcomed, so if this question is already answered, please
feel free to add additional comments/answers!

1. Use Local Variables in user interface code and no where else. The only exception is using a local variable of a cluster output to define the datatype for a bundle by name node.
2. You can drag copy them then right click to get to a menu of all the currently defined controls and indicators on the VI.
3. B. The problem with A is that it forces a thread switch to the user interface thread--which can take time if you aren't already in it, and it's a very convoluted process under the hood. NI's advice never update indicator values through a property node unless you absolutely, positively can't figure out some other way of doing it.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

About interface mapping

what are there case about interface mapping?
i knew that the following:
outbound to inbound
abstract to abstract.
what else the case?

Hi joy zheng ,
These r the details about interface mapping :
Interface Mappings
You can define mappings for an interface pair (source and target interface) by using message interfaces and message types in the Integration Repository.You can also define the corresponding mappings when the source or target interface is an IDoc, an RFC, or another interface connected by an adapter.
When defining mapping programs for request, response, or fault messages, the definition is first separated from the interfaces that reference the corresponding message types. Furthermore, you can reuse a message type for multiple interfaces. This means that the simple definition of a mapping program is not sufficient to establish a connection (that is based on the assignment of outbound and inbound interfaces).
This role is undertaken by the interface mapping:
●     An interface mapping specifies the corresponding mapping programs for request, response, or fault messages for a selected interface pair. You use an interface mapping to register mappings for an interface pair.
●     You can also specify multiple mapping programs to be executed one after the other in the case of requests and responses for an interface mapping.
You can also define multiple interface mappings for the same interface pair, to provide multiple variants in the Integration Repository. At configuration time, the customer can select the appropriate mapping in an interface determination and save it in the Integration Directory
Use :
Interface mappings register your mapping program for an interface pair in the Integration Repository. If you require a mapping at runtime, it is sufficient to select the interface mapping for the interface pair at configuration time . The Integration Server uses the interface mapping to identify associated mapping programs for request messages, response messages, fault messages, or all three.
Features
Executing Multiple Mapping Programs for One Direction
By using an interface mapping you can execute multiple mapping programs consecutively for the transformation of a request or response message. In such cases, an interface mapping comprises multiple steps for which the following applies:
●     The steps are executed in the sequence specified (from top to bottom). The result of the mapping program from the previous step is forwarded to the mapping program of the subsequent step.
●     Each step can reference a mapping program that executes a 1:1, 1:n, n:1, or an m:n transformation. In the case of multi-mappings (1:n, n:1, or m:n), the previous step must create the same number of messages that the subsequent step expects.
●     Multi-mappings use one envelope to put all messages in one structure. If one of the steps references a multi-mapping program, all subsequent steps must use the same envelope.
The mapping for a request message comprises two message mapping programs: one 1:1 transformation and one 1:n transformation. Since the latter message mapping uses the multi-mapping envelope for both the target message and the source message, the message mapping for the 1:1 transformation must also create a transformation result with a multi-mapping envelope.
You do not strictly need to divide up one direction of the whole mapping into different steps. However, this enables all the message formats in one system landscape to be mapped to a central message format, for example. This results in less mapping programs being required because you no longer need to be able to map all the different message formats to each other.
Activities
       1.      Create your interface mapping on the design maintenance screen of the Integration Builder (see also: Creating an Object).
You can also create multiple interface mappings for the same interface pair.
       2.      Enter the source and target interfaces that require a mapping of the request message, the response message, the fault message, or all three, in the table of the same name. The following restrictions apply:
○     If you want to use the interface mapping in a transformation step in an integration process, you must only specify abstract message interfaces. Furthermore, all objects (integration process, interface mapping, and all objects referenced by the interface mapping) must be in the same software component version. If you want to reference objects from underlying software component versions, you must access the objects from the Basis Objects branch (in the navigation tree or using an input help) (see also: Underlying Software Component Versions).
○     If you want to map multiple messages to each other by using a multi-mapping, you can only specify asynchronous interfaces (for further restrictions, see: Multi-Mappings). If any message interfaces are missing, you can also create them by using the functionCreate New Object ().
If the interface cannot be imported or cannot be created in the Integration Repository (in the case of an external adapter, for example), you must enter the interface names manually. However, it is not possible to check the technical name in this case.
       3.      To import the properties of the interfaces, choose Read Interfaces. The table in the lower area displays tab pages for the request message, response message, and if available, for the fault message, for each mode of the interfaces (either synchronous or asynchronous).
       4.      To develop an external mapping program, export the XSD schema of the respective request or response message as a zip file after you have imported the interfaces. The zip file can contain multiple schema files that reference each other, for example in a multi-mapping. In this case, the schema with the global message element has the name MainSchema.
       5.      To reference a mapping program for the respective message, you have the following options:
○     Select an existing mapping program from the Integration Repository by using the input help (). If this is a message mapping, the default setting of the input help only displays those message mappings that are found using the source and target message in the Integration Repository (in multi-mappings, the first source and target messages are used as the search criteria). However, you can also display any number of message mappings, for example, because you are constructing a mapping from several mapping programs with intermediate instances which have no message types.
○     You can create message mappings directly from the interface mapping. To do this, select the mapping type Message Mapping in the Type column. Position the cursor in the Name column and choose the function Create New Message Mapping () in the Mapping Program frame. The Integration Builder copies the specifications of the messages and their occurrence directly from the interface mapping.
An interface mapping can only reference mapping programs that belong to the same or an underlying software component version of the interface mapping. This ensures that the mapping program can be shipped together with the interface mapping (see: Software Logistics).
       6.      If you are not using a mapping for a fault message, you can execute multiple mapping programs in succession for request and response messages:
○     To insert an additional line for a mapping program, choose .
○     To delete the registration for a mapping program, choose .
At runtime, the mapping programs are executed from top to bottom.
       7.      Save the interface mapping.
The following web-site gives complete details about interface mapping :
http://help.sap.com/saphelp_nw2004s/helpdata/en/12/05731a10264057badc32d3d3957015/content.htm
**********Please reward points if u find this useful
cheers,
gyanaraj

Question about Interface

Hi everyone,
I have a question about interface :
an interface can only have abstract methods, right ?
so how come ResultSet (which is an interface) has methods like next() which can't be abstract otherwise it wouldn't do anything ?
thanks for answering !

an interface can only have abstract methods, right ?Yes. All methods in an interface are inherently public and abstract.
so how come ResultSet (which is an interface) has
methods like next() which can't be abstract otherwise
it wouldn't do anything ?It defines the next() method for classes that implement the interface. When you get a ResultSet reference returned from a method call, you're not getting a reference to an interface; you're getting a reference to an object that implements that interface (or null, as the case may be).

Tables where I can find information about IP variables, Infoprovider aggreg

Hello All,
Tables where I can find information about IP variables, Infoprovider aggregation level and filter.
The tables where we have info about tthe user exit variables. Similar to that of UPC* tables in BPS.
Thanks a lot,
Karthik Krishna

RSRPARAMETRIZA for Bex Analyzer 7.0
RSRVARIANTDIR     for Bex Analyzer 3.x
RSRVARIANTDIR     Directory of Variants for Queries and Selection Objects
RSRVARIANT             Variant Values BEX
We can access to value of one variant with name of query COMPUID (from RSRT --> Technical Informatione -->Data from Query Definition --> Techn. Definition Name) or with the name of Variant from RSRVARIANTDIR (the same for the technican nema of query COMPUID)
Edited by: Pierfrancesco Marvulli on Aug 31, 2011 3:23 PM

Interface Variable

Hi,
can somebode explain how succesfully create a bpm block witch Modus ForEach?
I have a multipleLine element which collects messages, now i want to send these messages seperate.
My idea was to create a block witch Modus ForEach and set the current Line property for sending with a end condition.
My Problem is that i cant set the current Line Property. The editor requeriers at this property a Interface variable.. but i cant chosse anything, its deaktive!
Can somebody give me a hint how to create a Interface Variable ?
regards

Hi ,
You will have to create two interface variables . Create one variable withoption multiline checked and another with unchecked . make sure the one which you define is of type multiline should be of of type which has occurance 0..unbound . Also make sure in your message type you have a variable which contains the total number of records/instances in multiline elements.
Then in your ForEach Block select the interface variable which has only one occurance ( multiline flag is unchecked) as currentline element . This loop will get executed till the counter = total number of records/instances in multiline elements
Thanks ,
Suvarna
Award pts if it helps.

Doubt about interface & abstract

Hai everybody,
I am new java technology. I need clear discribtion about interface & abstract.
Please give some examples and differentiate it.
i awaiting for your reply
by
azhar

Even Wikipedia has info about this:
http://en.wikipedia.org/wiki/Interface_%28Java%29
http://en.wikipedia.org/wiki/Class_%28computer_science
%29#Abstract_and_concrete_classeswhenever someone asks this question, they don't really want to read about it, they just want someone to tell them the secret rules about when to use an interface and when to use an abstract class. but we're not telling :-)

Docs about Interfaces between CO and BW/BI

Hi all Gurus,
I am just looking for documents about Interfaces between FI/CO and BW/BI. Can any body provide me the required documents. It is very urgent.... [email protected]
Thanks in advance
SIM
Edited by: SIM on Feb 22, 2008 12:19 PM

Hi
You are right. I meant the interfaces between FI/CO and BW/BI. Namely how do we build the Interfaces such as IDOC and other interfaces between them. I need practice oriented docs with all steps towards building interfaces.
Thanks
SIM

The question about Interface Mapping in BPM

Hello,
I am a few confused about an Interface Mapping in BPM at the Design step.
I have a task to transmit and trasform two messages of two sender file adapter to two IDOCs messages and then to send them to SAP system.
I use BPM.
But I don't understand what types of message interfaces should I use for source and target interfaces in Interface Mapping? As to the target interface I understand it must be abstract but which of interfaces exactly?
Actually there are some questions here:
1) If the source interface should be abstract or real in Interface Mapping?
2) If the target interface should be the abstract interface of Receive Step object or the abstract interface of Send Step object?
3) And what the message types should I use for the source and target message interfaces in Interface Mapping? If I understand correctly that these message types

hi igor,
you have to import the IDOC Types under the imported objects in the integration repository objects,
what are all the data that coming out from the file adapter, you design the datatype.
the target IDOC should be real and you do the mapping for the all necessary fields.
refer: --
File to IDOC:
Re: how to Sending XML data to idoc
IDOC Mapping:
http://help.sap.com/saphelp_crm40/helpdata/en/77/a1d48b1ce06d40932e0a26f3c117ce/frameset.htm

About Interface objects in Integration Repository

Hi All,
   I want to know details about Data type enhancements & Context objects in Interface Objects.Please help me.
Thanks,
GOPI.

Hi Gopikishor,
        _Context objects:_ Its nothing but to access a element payload of the message,in Simple terms, X-Path expressions in the repoistery..
Deeply Nested elements in the Message structure.
Ex:
<Header>
     <PurchaseOrgData>
            <Sender>
                   <PurchaseData> Goods</PurchaseData>
             </Sender>
     </PurchaseOrgData>
</Header>
Define X-path for the above structure: \Header\PurchaseOrgData\Sender\PurchaseData\
Once we can define the "Context Objects" we can use following situations..
1) Receiver Determination: During the Receiver Condition in the Integration directory,
2) Integration Process: During the processing business process depends upon content of message.
Datatype Enhancement:
http://help.sap.com/saphelp_nw04/helpdata/en/a5/04623c4f69b712e10000000a114084/frameset.htm.
Regards,
Sateesh N.

Help about Interfaces in Java

I need some help with Interfaces since I'm really new to OOP.
I have 1 interface, 1 class implementing the interface and 1 main function. Here is the structure:
public interface t_action
      public boolean isvalid(int a, int b);
public class sec implements t_action
     public boolean isvalid(int a, int b)
     /* Implmentation of this method */
public class main()
     public static void main(string args[])
          boolean valid = false;
          /* Need to call isvalid in public class sec
              and assign it to the "valid" variable above
}My Question is:
How do i call the method "isvalid" in class sec that implements the t_action interface? I need to assign it to my variable "valid" in class main
Any help is appreciated.
Thanks.
MAZ@McMaster Engineering

Hey all...
Thanks for your contribution.
As I said earlier here: "I'm new to Java" so cut me some slack!!!
I've been doing C programming all my life so java is similar but quite foreign to me since I started learning it recently on my own
If this were a normal class and not an interface, it would be:
class_name myclass = new class_name();
myclass.isvalid(a, b);But why is it:
interface_name i = new class_implementing_interface();
i.isvalid(a,b);Thanks

Question about interface for recording electric guitar and vocals

Ok, I've been messing around with Garageband all day, totally stoked and I'm ready to get into it. Right now I'm using a First Act quarter inch plug to USB cord to hook up my guitar and start recording and after some messing around I got it to work.
Here's my question... to really make quality recordings, what's the best way to hook up the guitar? Is the way I'm doing it now fine with the USB cord or is some sort of interface better? Can someone recommend one that's on the cheap side? Also, I haven't tried yet, but what's the best way to record vocals? Should I invest in a USB mic? Can anyone recommend one? I have a Shure SM58 already, what's the best way to hook that up?
Really excited about this, can't wait to start cranking out some songs!
PS: When I use the USB cord, I don't see any way to control the recording level, and sometimes I get a Feedback control warning. How can I lower the level so I don't get that? Thanks!
Message was edited by: xSlamx

I have a total now of 4 interfaces - I recently purchased a FOCUSRITE SAPPHIRE 6 USB - it's amazing quality and I only paid $149 for it at my local Guitar Center. I use it with my Guitar and everything sounds fantastic - they say the preamps are really high-quality for Mics too... I recommend it. I have a firewire interface too but the Sapphire is my man baby now - don't let the USB 1.1 fool you - it works flawlessly with my Mac and my Windows 7 machine too. It also comes with a selection of software including Ableton Live Lite and 4 really nice Focusrite plug-ins too.

Question about shared variables and report generator

I have a project with about 200-250 shared variables and at every 12 hours i want to make a report containing information about some boolean and double front panel variables linked to the shared variables... Now, i've tried with both the "Write Trace to SpreadSheet File" function from DSC->History and with different functions from NI Report Generation Toolkit. My problem is this: i would like to get my xls file to contain just the timestamps when my shared variable changed value. As it is, the number of rows in the file depends, obviously, on the sampling interval given as input. As an example, in 12 hours, my shared variable would change value maybe 5-6 times. Thus i would like my xls file to contain just 5-6 rows with those 5-6 changes. If i set the sampling interval to say, a matter of seconds, that would mean too much unneeded information in my xls file. Instead, if i set it to let's say 15 minutes, i would probably lose the moment the shared variable changed value. Is there a way for me to achieve my desired functionality with functions from DSC or Report Generation Toolkit? Thanks in advance, Sabin

Hi Mike and thanks for the reply. Actually, my first idea was exactly this: in an event case structure, whenever my variable changed value, i would retain the relevant data in an array and then at the 12 hour period write all of it in a report. However, my boss deeemed it memory unefficient and compelled me to use only one function. Thus my predicament... If you have more advice on this new info, i would be grateful... Cheers, sabin

Report Report Interface Variable Values Transport

Hi,
I'm trying to use the report report interface for passing variable values.
How can I pass variable values of the sender query into the reciever report?
An example:
- I've used the 0CALYEAR time characteristic infoobject with a suitable input variable in the sender query.
- The sender query is used in the report (web template)
for a chart in away that the x axis peresenting the years (is the 0CALYEAR).
- I'm trying to pass the mentioned variable input - and no the selected year from the chart (by generically), into the reciever report queries which contained the 0CALYEAR infoobject.
Best Regards,
Shani Bashkin

DEar Shani,
Did you check the assignment details onceagain on the 0CALYEAR in RSBBS transaction..
regards,
Hari

Need information about interfaces and namespaces in actionscript 3.0

Hi,
I need information about actionscript interfaces and
namespaces, I'm preparing for ACE for Flash CS3 and I need to learn
about this subjects and I can not find resources or simple examples
that make these subjects understandable.
Anybody can help me!
Thanks a lot.

Interfaces (cont.)
Perhaps the most useful feature of interfaces is that you not
only can define the data type but also method signature of the
class that implements this interface. In other words, interface can
define and enforce what methods class MUST implement. This is very
useful when classes are branching in packages and team of
developers works on a large application among others.
The general syntax for an Interface with method signatures is
written the following way:
package{
public interface InterfaceName {
// here we specify the methods that will heave to be
implemented
function method1 (var1:dataType,
var2:datType,…):returnType;
function method2 (var1:dataType,
var2:datType,…):returnType;
To the previous example:
package{
public interface IQualified {
function method1 ():void;
function method2 ():int;
Let’s write a class that implements it.
If I just write:
package{
public class ClassOne extends DisplayObject implements
IQualified {
public function ClassOne(){}
I will get a compilation error that states that I did not
implement required by the interface methods.
Now let’s implement only one method:
package{
public class ClassOne extends DisplayObject implements
IQualified {
private function method1():void{
return;
public function ClassOne(){}
I will get the error again because I implemented only one out
of two required methods.
Now let’s implement all of them:
package{
public class ClassOne extends DisplayObject implements
IQualified {
private function method1():void{
return;
private function method2():int{
return 4;
public function ClassOne(){}
Now everything works OK.
Now let’s screw with return datatypes. I attempt to
return String instead of void in method1 in ClassOne:
private function method1():String{
return “blah”;
I am getting an error again – Interface requires that
the method1 returns void.
Now let’s attempt to pass something into the method1:
private function method1(obj:MovieClip):void{
return;
Oops! An error again. Interface specified that the function
doesn’t accept any parameters.
Now rewrite the interface:
package{
public interface IQualified {
function method1 (obj:MovieClip):void;
function method2 ():int;
Now compiler stops complaining.
But, if we revert the class back to:
private function method1():void{
return;
compiler starts complaining again because we don’t pass
any parameters into the function.
The point is that interface is sort of a set of rules. In a
simple language, if it is stated:
public class ClassOne implements IQualified
it says: “I, class ClassOne, pledge to abide by all the
rules that IQualified has established and I will not function
correctly if I fail to do so in any way. (IMPORTANT) I can do more,
of course, but NOT LESS.”
Of course the class that implements an interface can have
more that number of methods the corresponding interface requires
– but never less.
MORE means that in addition to any number of functions it can
implement as many interfaces as it is desired.
For instance, I have three interfaces:
package{
public interface InterfaceOne {
function method1 ():void;
function method2 ():int;
package{
public interface InterfaceTwo {
function method3 ():void;
package{
public interface InterfaceThree{
function method4 ():void;
If our class promises to implement all three interface it
must have all four classes in it’s signature:
package{
public class ClassOne extends DisplayObject implements
InterfaceOne, InterfaceTwi, InterfaceThree{
private function method1():void{return;}
private function method2():int{return 4;}
private function method3():void{return;}
private function method4():void{return;}
public function ClassOne(){}
Hope it helps.

About Interface variables...

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