Use of supply function and WDCopyService..

Hi,
Thank you for ur help on WdCopyService to copy node elements..
This is current scenario n requirement is:-
1. I have a RFC (model node) that returns 20 transactions on each "Load next" button click.
2. Now using output data of this model node, a context node "Transaction" is populated. A Supply function "SupplyTransaction" is used for this purpose.
3. This "Transaction" node has further subnodes and these are used to fill up several tables in view.
3. What i want to do is, Transaction node elements which were previously added using supply function should be retained. The next new 20 elements should get added to it.
What are the possible ways to do this?
Pls help me as soon as possible..
Regards,
Amey

HI Amey
I think for the result that u want to achieve, u shud nt use supply function.
I ll suggest u to use the same logic that u ve written in the supply function to be written immediately after u get data in your output model node.
Try this.
I hope it solves your problem.
Regards
Kapil S Kamble

Similar Messages

Use Of SUPPLY Function & Singletone Class?

Hi,
What is the Use of Supply Function & What is Sigletone Class?
Thanks
Ranveer

Hi Ranveer,
Each context node of a controller can be assigned a supply function. This supply
function is called by the runtime when the data of the context node is used. This is the case
when a UI element is to be displayed for the first time with the data of the corresponding
context.
In general, the supply function is called when one or more elements of a context node are
accessed and when
● the context node is not filled yet or is initial, or
● the context node has been invalidated in a previous step.
Supply Functions of Singleton Nodes
The supply function is especially useful in combination with singleton nodes.The
values of subnode elements of the type Singleton depend on the element of the parent node
to which the lead selection is currently assigned. If the lead selection is changed by the user,
the supply function can access the new lead selection element and recalculate the values of
the subnode elements accordingly.
You can only create such a view when the lead selection element of the node
CARRIER_NODE is read in the supply function of the node CONNECTION_NODE:
For eg:
method GET_CONNECTIONS .
data: CARR_ATTR type IF_MAINVIEW=>ELEMENT_CARRIER_NODE,
FLIGHTS type SPFLI_TAB.
get filled structure for parent node
PARENT_ELEMENT->GET_STATIC_ATTRIBUTES( importing
STATIC_ATTRIBUTES = CARR_ATTR ).
get connections from help class
FLIGHTS = CL_WD_GET_SPFLI=>GET_FLIGHTS_BY_CARRID(
CARRID = CARR_ATTR-CARRID ).
NODE->BIND_ELEMENTS( FLIGHTS ).
endmethod.
Explanation:
An internal variable of the type of a context element of the parent node
CARRIER_NODE and another internal variable of the Dictionary type SPFLI_TAB are
declared.
● The attribute values of the lead selection element of the parent node CARRIER_NODE
are then passed to the internal variable CARR_ATTR.
For this transfer, each supply function uses the parameter
PARENT_ELEMENT of the reference type IF_WD_CONTEXT_ELEMENT.
PARENT_ELEMENT is a reference to the lead selection element of the parent node of
the current node. The parameter is automatically displayed in the signature of the
supply function.
Each time the user selects another table element as the lead selection in the table Carrier,
the value of the parameter PARENT_ELEMENT changes. The supply function of the context
node CONNECTION_NODE is called and the values of its attributes are newly filled
according to the selected table line in the table Carrier.
Supply functions can only access context data that
■ is contained in the corresponding parent node or
■ is contained in another node that is on a next-highest level compared to
the node filled by the corresponding supply function.
Cheers,
Mary

What is Supply Function, use of Supply function?

Hi Guru's,
Can you give a definition or description of Supply Function, and what is the use?
Thanks,
Pradeep.

Hi Pradeep,
Okay, conceptually you have understood it, that is good
Hope you have also, visited this link
Supply function with singleton concept | Webdynpro ABAP
Then let us have a simple example to understand how it works.
Let us say we have parent node PNODE & child node CNODE
PNODE node has 2 records and for each record CNODE has 3 records
Whenever the data of PNODE is bound/changed, the supply function of CNODE executes. Hence, you are able to get the control during initialization.
Now, if you have set the lead selection at line 2, i.e. there is change to context PNODE, hence the supply function of CNODE triggers and it gets the reference of 2nd record in PARENT_ELEMENT inside supply function and based on this the child node data can be populated.
Even, if you refresh node PNODE using method lo_pnode->INVALIDATE( ), the supply function of CNODE triggers.
Hence, whenever there is change at PARENT'S context node, the supply function of its child node(s) gets called.
Hope it gives little light on the supply function's practical usage.
Regards,
Rama

I don't know how to use the canlendars function and the notes are kind of messy code,anyone help me

i don't know how to use the canlendars function and the notes are kind of messy code,anyone help me

Step by step:
1. On your main vi Front Panel, create your boolean indicator.
2. On the block diagram, right click the new boolean indicator and select Create - Reference.
3. On sub-vi front panel, create boolean indicator (or use one that is already created).
4. On sub-vi front panel, create a reference (Controls Palette - Refnum - Control Refnum).
5. Right click on the newly created Refnum and select Select Vi Server Class - Generic - GObject - Control - Boolean. The refnum label changes to BoolRefnum.
6. On sub-vi block diagram, create Property Node (Functions - Application Control - Property Node). Find the BoolRefnum and move it close to the new Property Node.
7. Wire the BoolRefnum to the reference input of the property node.
8.
Right click on the property node and select Change to All Write.
9. Move mouse to point to Visible inside property node box, left click and select Value.
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11. On sub-vi front panel, right click on icon and select Show Connector.
12. Click on empty connector spot then click on the new BoolRefnum. Save your sub-vi.
13. On main vi block diagram, connect refernece created in step 2 to the new connector terminal of sub-vi.
14. Save and run.
Here are the modified vi's.
- tbob
Inventor of the WORM Global
Attachments:
Pass_a_Reference.vi ‏20 KB
GL_Flicker_mod.vi ‏83 KB

Specialty of supply function and how can we use it efficiently?

Hi Experts,
I have one question.
What exactly the function of “Supply function” for a node.
Some says when ever lead change happens the “Supply function” triggers.
I put a break point in Supply function say “ZSupply” written code to populate the table.
It triggered only once to populate the table. If this is the functionality then I can write code in method and call it in modify view my checking it for first time why “supply function”. I want to know what is its specialty, how can we use it efficiently?
Thanks
Gopal

Hi Gopal,
You are correct even without supply function you can achieve the same functionality i.e when ever there is a change in HEADER the corresponding ITEM for the HEADER can be displayed.
But the idea of using SUPPLY Function is - the code written in the node i.e assume HEADER and ITEM relation gets executed as and when the node is instantiated in the run time where in there is no need us to handle it explicitly.
If not used SUPPLY Function then we need to handle the complete HEADER and ITEM relation explicitly.
Regards,
Mohammed

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If I cannot use synonym for this issue, is there another way to solve the problem?

Now, in some instances you will absolutely need to create the second module as Carsten describes, however it should also be noted that you can reference objects in things like Expressions even if you have not loaded up the metadata. It is only when you need strong binding that it becomes neccessary to import objects. For everything else, as long as the reference will resolve at compile-time then you are good to go.
For example, I have a function in one target schema (S1) and a private synonym to it in another(s2). A mapping in the S2 schema has an expression object that uses the synonym to the function in the expression property for a couple of the output attirbutes. The synonym has not been loaded into metadata - indeed OWB has no knowledge of its existance. But it resolves at compile time so the mapping validates and generates successfully.
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Having trouble with using variables in functions and after functions..

Morning,
I have simplified this, as it represents the core of what’s I obviously don't know how to do.
Problem:
Say I populate that variable by reading in a list if IP addresses from file, finding the line that matches the hostname and place that string into the $IPAddress variable for use later throughout the script.   I did not run into a significant problem
until I decided to convert the routine of looking up the IP address and populating the variable into a function.   As soon as I made it a function, and called that function, the $IPAddress variable only had the data in it until the function completed.
Once the function had done its work, and had placed the data into the variable, I expected that “new” data to be available after the function had completed..in that variable. But it’s like the $IPAddress variable in the main script is a totally
different data then the variable with the same name that’s used within the function.
So I think this demonstrates some of what’s kicking my butt..
$IPAddress = "This is the wrong data”
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$IPAddress #call to display the contents of the variable at the start of the function.
$IPAddress = Read-Host -Prompt "Please enter the text ‘Goober’"
$IPAddress   #call to display the contents of the variable at the end of the function.
TestFunction
$IPAddress
The output I get is:
This is the wrong data
"Please enter ‘Goober’" : where I enter Goober
Goober
This is the wrong data
Huh?
I had expected:
This is the wrong data
"Please enter ‘Goober’" : where I enter Goober
Goober
Goober
What good is the repeatability of a function if it’s output is lost?

THis seems to work.. IS there any reason NOT to do this?
$Global:IPAddress= "This is the wrong data” #"
Function TestFunction{
    Write-Host $IPAddress-fore green
      $host.ui.RawUI.FlushInputBuffer()
     $Global:IPAddress =
Read-Host -Prompt
"Please enter the text ‘Goober’"
    return$Global:IPAddress
TestFunction
return$Global:IPAddress

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ebro

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http://www.enhansoft.com/

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I use medium '5 - external send' in the output message record.
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Thanks a lot !!

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Hi Everyone
I'm a begginer in BO and i'm experiencing problems when trying to create a webi report that shows different courses, how many males and females in a course, their race and how many people attended each course. My challenge comes in wen i try to group by distinct courses:
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BEXX11             Female     Coloured    2
BEXX11             Male         African      1
C3                    Male         Indian        2
F3                    Female      White       1
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Using tempo change function and it's adding space?????

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Calling supply function

Hi
Can we call supply function explicitly in any other method of the view using wd_this->supply function name( ) ?.
In case the supply function is local to the view and when it is defined in component controller ?

hi vishal........
      you cannot call supply function explicitly.......
      what you can do is.... invalidate the node that has the supply function. so the supply function will be called again.
---regards,
   alex b justin

Breifly xplain wht lead selection ,cardinality &singleton&supply function

Hi Friends ...
             Let plz xpalin in breif   wht is lead selection ,cardinality &singleton&supply function and how these all helpfull whtz the relation ship between while creating a table...
itz bit urgent for me am working with dynamic tables and am in confuse...plz make it out this query...

Lead selection
     Leadselection is the property which is used to get the index of the selected row of the table
"OnLeadSelect" is the method used to fire an action when a row is selected
     The Method wdContext.<node>().getLeadSelection() can be used to
find out the index of the selected element.
Cardinality
Any node or attribute that has the context root node as its immediate parent, is known as an independent node or attribute.
Any node or attribute that has some other node as its immediate parent, is known as a dependent node or attribute.
All context nodes are collections.
A node collection is composed of elements, where an element is an aggregation of the nodes immediate children (attributes and/or other nodes).
The cardinality property controls the number of elements a node collection may hold at runtime.
Every context node has a property called Cardinality. This property is composed of two values that
taken together, describe the maximum and minimum number of elements the node collection may hold
at runtime.
Cardinality Minimum: 0 or 1
Cardinality Maximum: 1 or n
Therefore, there are four possible cardinality values (specified as <Min>..<Max>)
0..1 Zero or one elements permitted
0..n Zero or more elements permitted
1..1 One and only one element permitted
1..n One or more elements permitted
Singleton
All independent nodes are forced to be singletons. This is because the context root node has one and only one element.
Singleton is boolean
TRUE : One instance will be created for all te nodes
FALSE : Every Element in the parent node collection,there will be a distinct instance of the child node.
Why Singleton
     -Efficiency
     -Less Memory
     -Lazy Data Access(Creates instance only when needed,till then it will remain unprocessed)
Supply functions
     Supply functions are the mechanism to repopulate child nodes when the lead selection in the parent node
changes. When a singleton child node is declared, you must also write an accompanying supply function.
The Web Dynpro Framework will then automatically call your supply function when the lead selection
in the parent node changes.
Regards
Chaitanya.A

Supply Function

Hello Everybody,
Can someone tell me what Suppy Function used for?
Whats the significance of it? Is it mandatory?
Please explain it to me.
Thanks,
Sneha SIngh.

Hi Sneha,
I assume you are asking in connection with the Laptop Application you are developing (from your other thread)?
I am not used Web Dynpro much, but supply functions are mandatory if you're using a singleton node (i.e. Say node B is the child of node A, and node B is a singleton). So every time you change the lead selection of node A, you need to repopulate node B with the corresponding child values, and a supply function is used to do this.
Also, you can define supply functions for non singleton nodes as well. If you try to access such a node and it turns out to be empty, Web Dynpro will automatically fill the values with a supply function and return it to you. (this is when a supply function is not mandatory).
This link explains supply functions concisely:
https://wiki.sdn.sap.com/wiki/display/WDJava/SupplyFunctionin+Webdynpro
By the way, this question looks relevant for Web Dynpro forum.
Cheers!

Use of supply function and WDCopyService..

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