Model provider class and data provider class

please explain Model provider class and data provider class?

Hi,
both MPC and DPC get generated as runtime artifacts.
MPC - This is used to define model. you can use the method Define to create entity, properties etc using code based implementation. you rarely use MPC extension class.
DPC - used to code your CRUDQ methods as well as function import methods. you write all your logic in redefined methods of DPC extension class.
Refer Generated ABAP Classes and Service Registration - SAP NetWeaver Gateway - SAP Library for more information.
you can also refer my blog Let’s code CRUDQ and Function Import operations in OData service! which will provide you clear idea on how to redefine various CRUDQ methods in DPC extension class.
Regards,
Chandra

Similar Messages

DELIVERY Billing class and ORDER Billing class

Hi,
I am maintiang an custom table and I Need to add DELIVERY Billing class and ORDER Billing class entries for a list of country.I am not sure where I can find this info in customising or is there any table which hold this info per country wise can you help.
Regards,
Amanda

Hi Shiva ,
Thank you for your reply, could you help me like what is the billing class maintained I need to mintained Billing class in the table .
Client     ID     Billing class                          Country     Billing type
                                         "D = Delivery Related
                                          O = Order Related"
Regards,
Amy

Name.class and Name$1.class

Hi there !
When I compile certain source codes, I've noticed that the result contains two (or more) classes which are named for example Name.class and Name$1.class.
What does that $1 mean ?
Thanks,
- Miika -

The Name$1.class is an anonymous inner class of the Name1 class. Its just a naming convention in java.

Dropdown and data provider. I want to add an item to my dropdown

Hi,
here my problem. I've a downdrop. It is binded to a data provider. It works fine, all the db rows are displayed.
Now I want to add an item to my downdrop, programmatically. This because, I need to put a new selection named "ALL" into the dropdown.
This item should be the first in the dropdown list selections.
I cant' work with an option array, because it is already binded to a data provider, so how can I add an item to my dropdown programmatically?
Thank you

No problem... you're helping me!!
Well, about the data provider I just find the following code, but nothing about the "option" method. If you need I can provide you also the session bean code.
private void _init() throws Exception {
 pers_categorieDataProvider.setCachedRowSet((javax.sql.rowset.CachedRowSet)getValue("#{SessionBean1.pers_categorieRowSet}"));
 private DropDown dropDownPersCat = new DropDown();
 public DropDown getDropDownPersCat() {
 return dropDownPersCat;
 public void setDropDownPersCat(DropDown dd) {
 this.dropDownPersCat = dd;
 private CachedRowSetDataProvider pers_categorieDataProvider = new CachedRowSetDataProvider();
 public CachedRowSetDataProvider getPers_categorieDataProvider() {
 return pers_categorieDataProvider;
 public void setPers_categorieDataProvider(CachedRowSetDataProvider crsdp) {
 this.pers_categorieDataProvider = crsdp;
 private LongConverter dropDownPersCatConverter = new LongConverter();
 public LongConverter getDropDownPersCatConverter() {
 return dropDownPersCatConverter;
 public void setDropDownPersCatConverter(LongConverter lc) {
 this.dropDownPersCatConverter = lc;
 public Indirizzario() {
 public void init() {
 // Perform initializations inherited from our superclass
 super.init();
 // Perform application initialization that must complete
 // *before* managed components are initialized
 // TODO - add your own initialiation code here
 // <editor-fold defaultstate="collapsed" desc="Managed Component Initialization">
 // Initialize automatically managed components
 // *Note* - this logic should NOT be modified
 try {
 _init();
 } catch (Exception e) {
 log("Indirizzario Initialization Failure", e);
 throw e instanceof FacesException ? (FacesException) e: new FacesException(e);
 // </editor-fold>
 // Perform application initialization that must complete
 // *after* managed components are initialized
 // TODO - add your own initialization code here
 * Callback method that is called after the component tree has been
 * restored, but before any event processing takes place. This method
 * will only be called on a postback request that
 * is processing a form submit. Customize this method to allocate
 * resources that will be required in your event handlers.
 public void preprocess() {
 * Callback method that is called just before rendering takes place.
 * This method will only be called for the page that
 * will actually be rendered (and not, for example, on a page that
 * handled a postback and then navigated to a different page). Customize
 * this method to allocate resources that will be required for rendering
 * this page.
 public void prerender() {
 * Callback method that is called after rendering is completed for
 * this request, if <code>init()</code> was called (regardless of whether
 * or not this was the page that was actually rendered). Customize this
 * method to release resources acquired in the <code>init()</code>,
 * <code>preprocess()</code>, or <code>prerender()</code> methods (or
 * acquired during execution of an event handler).
 public void destroy() {
 pers_categorieDataProvider.close();
 * Return a reference to the scoped data bean.
 protected SessionBean1 getSessionBean1() {
 return (SessionBean1)getBean("SessionBean1");
 * Return a reference to the scoped data bean.
 protected RequestBean1 getRequestBean1() {
 return (RequestBean1)getBean("RequestBean1");
 * Return a reference to the scoped data bean.
 protected ApplicationBean1 getApplicationBean1() {
 return (ApplicationBean1)getBean("ApplicationBean1");
}

Difference between abstract class and the normal class

Hi...........
can anyone tell me use of abstract class instead of normal class
The main doubt for me is...
1.why we are defining the abstract method in a abstract class and then implementing that in to the normal class.instead of that we can straight way create and implement the method in normal class right...../

Class vs. interface
Some say you should define all classes in terms of interfaces, but I think recommendation seems a bit extreme. I use interfaces when I see that something in my design will change frequently.
For example, the Strategy pattern lets you swap new algorithms and processes into your program without altering the objects that use them. A media player might know how to play CDs, MP3s, and wav files. Of course, you don't want to hardcode those playback algorithms into the player; that will make it difficult to add a new format like AVI. Furthermore, your code will be littered with useless case statements. And to add insult to injury, you will need to update those case statements each time you add a new algorithm. All in all, this is not a very object-oriented way to program.
With the Strategy pattern, you can simply encapsulate the algorithm behind an object. If you do that, you can provide new media plug-ins at any time. Let's call the plug-in class MediaStrategy. That object would have one method: playStream(Stream s). So to add a new algorithm, we simply extend our algorithm class. Now, when the program encounters the new media type, it simply delegates the playing of the stream to our media strategy. Of course, you'll need some plumbing to properly instantiate the algorithm strategies you will need.
This is an excellent place to use an interface. We've used the Strategy pattern, which clearly indicates a place in the design that will change. Thus, you should define the strategy as an interface. You should generally favor interfaces over inheritance when you want an object to have a certain type; in this case, MediaStrategy. Relying on inheritance for type identity is dangerous; it locks you into a particular inheritance hierarchy. Java doesn't allow multiple inheritance, so you can't extend something that gives you a useful implementation or more type identity.
Interface vs. abstract class
Choosing interfaces and abstract classes is not an either/or proposition. If you need to change your design, make it an interface. However, you may have abstract classes that provide some default behavior. Abstract classes are excellent candidates inside of application frameworks.
Abstract classes let you define some behaviors; they force your subclasses to provide others. For example, if you have an application framework, an abstract class may provide default services such as event and message handling. Those services allow your application to plug in to your application framework. However, there is some application-specific functionality that only your application can perform. Such functionality might include startup and shutdown tasks, which are often application-dependent. So instead of trying to define that behavior itself, the abstract base class can declare abstract shutdown and startup methods. The base class knows that it needs those methods, but an abstract class lets your class admit that it doesn't know how to perform those actions; it only knows that it must initiate the actions. When it is time to start up, the abstract class can call the startup method. When the base class calls this method, Java calls the method defined by the child class.

Urgent: how to really seperate business logic class from data access class

Hello,
I've this problem here on my hand and i really need help urgently. so please allow me to thank anyone who replies to this thread =)
Before i go any futhur, let me present a scenario. this will help make my question clearer.
"A user choose to view his account information"
here, i've attempted to do the following. i've tried to seperate my application into 3 layers, the GUI layer, the business logic layer, and the data access layer.
classically, the GUI layer only knows which object it should invoke, for example in the case above, the GUI would instantiate an Account object and prob the displayAcctInfo method of the Account object.
here is how my Account class looks like:
public class Account
private acctNo;
private userid;
private password;
private Customer acctOwner;
the way this class is being modelled is that there is a handle to a customer object.
that being the case, when i want to retrieve back account information, how do i go about retrieveing the information on the customer? should my data access class have knowledge on how the customer is being programmed? ie setName, getName, setAge, getAge all these methods etc? if not, how do i restore the state of the Customer object nested inside?
is there a better way to archieve the solution to my problem above? i would appriciate it for any help rendered =)
Yours sincerely,
Javier

public class AccountThat looks like a business layer object to me.
In a large application the GUI probably shouldn't ever touch business objects. It makes requests to the business layer for specific information. For example you might have a class called CustomerAccountSummary - the data for that might come entirely from the Account object or it might come from Account and Customer.
When the GUI requests information it receives it as a 'primitive' - which is a class that has no behaviour (methods), just data. This keeps the interface between the GUI and business layer simple and makes it easier to maintain.
When using a primitive there are four operations: query, create, update and delete.
For a query the gui sets only the attributes in the primitive that will be specifically queried for (or a specialized primitive can be created for this.) The result of a query is either a single primitive or a collection of primitives. Each primitive will have all the attributes defined.
For a create all of the attributes are set. The gui calls a method and passes the primtive.
For an update, usually all fields are defined although this can vary. The gui calls a method and passes the primitive.
For a delete, only the 'key' fields are set (more can be but they are not used.) The gui calls a method and passes the primitive.
Also keep in mind that a clean seperation is always an idealization. For example verify that duplicate records are not created is a business logic requirement (the database doesn't care.) However, it is much easier and more efficient to handle that rule in the database rather than in the business layer.

MSS Object and data provider Important

Dear All,
I have a requirement of changing the list of data that is displaying on the general information of the Manager iview.
The manager should look the Org unit till depth 3. But we have a standard rule for setting it till org unit 2(MSS_TMV_RULE3).
So i copied the standard and changed the rule with the depth till 3. and attached that to the object selection MSS_TMV_EE_ORG1. But it is not working do i need to do some other customizing change in that.
Please help me to solve this issue.....
Thanks
Yogesh

hi
if you have made a new view , the new view should be mentioned in the ivew property in the eportal .
This should help.
Regards
sameer.

MSS - Object and data provider

Hi,
had questions regarding the view groups in the OADP. first, the employee selection for Personnel change request is based on view group MSS_PCR_SELECT. This view group has views which in turn have root , navigation and target selections. due to which the manager logging in can see/navigate through the employees based on their org units etc.
Now for approving time ( direct link "approve timesheet data") , we used the standard view group MSS_LCA_EE. The views assigned here do not have a naviagtion object , due to which the manager is able to see all the employees listed at once, we created a custom view group based on the std one , added a navation object so that the manager can click on the org units (just like for selecting employees for PCR) and based on that the employees are displayed and then their time can be approved. Somehow this does not seem to work. It displays the whole list of employees. IT seems its just not taking that navigation object. Anyone tried achieving the same functionality ??
We are on ERP 2005 , MSS BP 1.0.

Hi Mark -
I am trying to do something similar and not having much luck.. I am trying to change the main Team Viewer on the employee General Information change. My client has a requirement where they do not want to use the manager (012) as the MSS user. The have lower level supervisors identified that link S to S (using 002). I created new eval paths for the root and navigation/target objects. I test them via transaction PPST and they return expected results. I created new rules and associated the eval paths, created new view, org view, etc. Then I went to the Employee Search (Team Viewer) iVew and changed the parameter to switch out my new org grp view. It does not work. In MSS, I get the message "no employees found."
The parameters (OADP) objects I switched out were:
View Grp = MSS_TMV_EE
View = MSS_TMV_EE_ORG1
I am also on ERP 2005 , MSS BP 1.0
If you got your issue fixed and can share anything that will help my issue I would greatly appreciate it.
Regards,
Karen

ComboBox and data provider

hi,
i need to populate a combo box with values form an
ArrayColection that contains objects, how can i sepecify the field
of each object in the array that should be displayed in the combo
box ??
cheers,
jaimon

Using the labelField property of the ComboBox.
For further information please refer to the language
reference, this contains all the properties of all the Flex
components and how they are used.
http://livedocs.macromedia.com/flex/2/langref/index.html

Customizing Settings for the Object and Data Provider

Dear All,
I am trying to create a view for my manager to view ONLY their direct report employees (relationship A002).
Anyone knows what is the organization view that i need to use or which evaluation path that i an use?
Thanks.
Regards,
Bryan

Hi Bryan,
Please use this function module to given the list of direct reporting employee for the org level HRWPC_GET_DIREPS_OF_LEVEL_1 the format is O-S-P.
This will list the employees who are direct reporting to the manager.
Thanks & Regards,
Ganesh R K

How to get HTTP headers from Data Provider Class?

Hi,
I'm the beginner in SAP NetWeaver Gateway. Using Service Builder I created CRUD OData web service and implemented CRUD operations in Data Provider Class. Data Provider Class has methods like MYENTITY_GET_ENTITYSET, MYENTITY_GET_ENTITY, MYENTITY_CREATE_ENTITY, MYENTITY_UPDATE_ENTITY. How can I get HTTP headers from the methods of this Data Provider Class?

You can do so by using the following code in DPC
Data : Lo_facade type ref to /IWBEP/IF_MGW_DP_INT_FACADE.
lo_facade ?= /iwbep/if_mgw_conv_srv_runtime~get_dp_facade( ).
lt_client_headers = lo_facade->get_request_header( ).
Regards,
Atanu

Custom Data Provider Not Registered in Report Server (Sql Server 2012)

We have a simple test report project set up and can preview the reports with no errors or problems from the designer. We can deploy the report project, but when trying to view the reports from the browser, we get the following error:
An error as occurred during report processing, (rsProcessingAborted)
An attempt has been made to use a data extension 'LiMeDAS' that is either not registered for this report server or is not supported in this edition of Reporting Services. (rsDataExtensionNotFound)
I have followed this article that explained how to register a data provider extension:
https://msdn.microsoft.com/en-ca/library/bb326409.aspx
I have placed the assemblies in:
C:\Program Files\Microsoft SQL Server\MSRS11.LIMEDAS\Reporting Services\ReportServer\bin
Added the following line to the rsreportserver config file (inside the <extensions><data> tags)
<Extension Name="LiMeDAS" Type="Limedas.Data.Provider.LimedasConnection,Limedas.Data.Provider"/>
and finally added the following to the rssrvpolicy config file (inside the top level CodeGroup tag):
<CodeGroup class="UnionCodeGroup" version="1" PermissionSetName="FullTrust" Name="LiMeDASDataProviderCodeGroup" Description="Grants permission to the LiMeDAS data processing extension for reporting services.">
<IMembershipCondition class="UrlMembershipCondition" version="1" Url="C:\Program Files\Microsoft SQL Server\MSRS11.LIMEDAS\Reporting Services\ReportServer\bin\Limedas.Data.Provider.dll"
/>
</CodeGroup>
We have the data extension set up perfectly for the designer, because I can see it as a type of connection and the preview works in the designer.
But, for some reason it does not work in the server. They were set up the same way, but the server will not work. From the report manager page, when we try to add a data source, the only type option is Sql Server, none of the other extensions mentioned in
the config file. Does anyone know what else could cause this issue?

Hi Justin,
According to the error message and the issue can be caused by the edition of your SSRS is not support for the custom data provider. For example the express edition have limitation support on this:
Features Supported by the Editions of SQL Server 2012 .
If your edition is the supportted edition and the issue can be caused by the custom data provider do not necessarily support all the functionality supplied by Reporting Services data processing extensions. In addition, some OLE DB data providers and ODBC
drivers can be used to author and preview reports, but are not designed to support reports published on a report server. For example, the Microsoft OLE DB Provider for Jet is not supported on the report server. For more information, see
Data Processing Extensions and .NET Framework Data Providers (SSRS).
If you are running on a 32-bit platform, the data provider must be compiled for a 32-bit platform. If you are running on a 64-bit platform, the data provider must be compiled for the 64-bit platform. You cannot use a 32-bit data provider wrapped with 64-bit
interfaces on a 64 bit platform.
More details information:Data Sources Supported by Reporting Services (SSRS)
Similar thread for your reference：
ERROR: An attempt has been made to use a data extension 'SQL' that is not registered for
this report server.
Error when viewing SSRS report with SQL Azure as data source
If you still have any problem, please feel free to ask.
Regards
Vicky Liu
Vicky Liu
TechNet Community Support

Difference b/w Java Class and Bean class

hi,
can anybody please tell me the clear difference between ordinary java class and java Bean class. i know that bean is also a java class but i donno the exact difference between the both.
can anybody please do help me in understanding the concept behind the bean class.
Thank u in advance.
Regards,
Fazlina

While researching this question, I came across this answer by Kim Fowler. I think it explains it better than any other answer I have seen in the forum.
Many thanks Kim
Hi
Luckily in the java world the definition of components is a little
less severe than when using COM (I also have, and still occasionaly
do, worked in the COM world)
Firstly there are two definitions that need to be clarified and
separated: JavaBean and EnterpriseJavaBean (EJB)
EJB are the high end, enterprise level, support for distributed
component architectures. They are roughly equivalent to the use of MTS
components in the COM/ COM+ world. They can only run within an EJB
server and provide support, via the server, for functionality such as
object pooling, scalability, security, transactions etc. In order to
hook into this ability EJB have sets of interfaces that they are
required to support
JavaBeans are standard Java Classes that follow a set of rules:
a) Hava a public, no argument constructor
b) follow a naming patterns such that all accessor and modifier
functions begin with set/ get or is, e.g.
public void setAge( int x)
public int getAge()
The system can then use a mechanism known as 'reflection/
introspection' to determine the properties of a JavaBean, literally
interacting with the class file to find its method and constructor
signatures, in the example above the JavaBean would end with a single
property named 'age' and of type 'int' The system simply drops the
'set' 'get' or 'is' prefix, switches the first letter to lower case
and deduces the property type via the method definition.
Event support is handled in a similar manner, the system looks for
methods similar to
addFredListener(...)
addXXXListener
means the JavaBean supports Fred and XXX events, this information is
particularly useful for Visual builder tools
In addition there is the abiliity to define a "BeanInfo' class that
explicitly defines the above information giving the capability to hide
methods, change names etc. this can also be used in the case where you
cannot, for one reason or another, use the naming patterns.
Finally the JavaBean can optionally - though usually does - support
the Serializable interface to allow persistence of state.
As well as standard application programming, JavaBeans are regularly
used in the interaction between Servlets and JSP giving the java
developer the ability to ceate ojbect using standard java whilst the
JSP developer can potentially use JSP markup tags to interact in a
more property based mechanism. EJB are heaviliy used in Enterprise
application to allow the robust distribution of process
HTH.
Kim

Need to Match Result in Report to Data Provider

Hi!
My report is using an Excel file to populate my "Payout" data provider. The data provider has the following values
Performance/Payment/Level
10 pt /5% /1
15 pt /7% /2
My report is calculating a performance of 12 pt which I am trying to match against the "Payout" data provider to get the Payment of 5%. Is this possible in DeskI and if so how?
Any help you can provide will be appreciated.
Thanks!
Edited by: akrupa on Sep 25, 2009 8:45 PM
Edited by: akrupa on Sep 25, 2009 8:47 PM
Edited by: akrupa on Sep 25, 2009 8:49 PM

Hi,
If the number of payment levels is not to big you might concider to put them on one line in the excel file.
Like:
level 1 points | level 1 percentage | level 2 points | level 2 percentage
10 | 5 | 15 | 7
When you read that into BusinessObjects you can then assign the percentages by using the formula:
=If <performance> < <level 1 points> Then 0 Else If <performance> < <level 2 points> Then <level 1 percentage>
Else <level 2 percentage>
Regards,
Harry

List display for ALV using class and methods

Hi friends
I want the list display for the ALV using Class and methods
which class and methods i can use.
Here we can't use the REUSE_ALV_LIST_DISPLAY and also GRID
I was done GRID display using class and methods but i want only list display for using class.
plz Give me sample code of list display not for grid.
Thanks
Nani.

hi
please check with this code...
declare grid and container.
DATA : o_alvgrid TYPE REF TO cl_gui_alv_grid,
o_dockingcontainer TYPE REF TO cl_gui_docking_container,
i_fieldcat TYPE lvc_t_fcat,"fieldcatalogue
w_layout TYPE lvc_s_layo."layout
If any events like double click,etc., are needed we have to add additional functionality.
call the screen in program.
Then , create the container as follows
IF cl_gui_alv_grid=>offline( ) IS INITIAL.
CREATE OBJECT o_dockingcontainer
EXPORTING
ratio = '95'
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
create_error = 3
lifetime_error = 4
lifetime_dynpro_dynpro_link = 5
others = 6.
ENDIF.
CREATE OBJECT o_alvgrid
EXPORTING
i_parent = o_dockingcontainer.
Build the fieldcatalog
create a output structure in SEll for the ALV output
CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
EXPORTING
i_structure_name = <alv output>
CHANGING
ct_fieldcat = i_fieldcat[]
EXCEPTIONS
inconsistent_interface = 1
program_error = 2
OTHERS = 3.
IF sy-subrc <> 0.
MESSAGE i030."Error in building the field catalogue
LEAVE LIST-PROCESSING.
ENDIF.
*If you need to modify the field catalog,modify it using field sysmbols
*setting the layout
w_layout-grid_title = title.
w_layout-zebra = 'X'.
then displaying the output
CALL METHOD o_alvgrid->set_table_for_first_display
EXPORTING
i_save = 'A'
is_layout = w_layout
CHANGING
it_outtab = i_output[]
it_fieldcatalog = i_fieldcat[]
EXCEPTIONS
invalid_parameter_combination = 1
program_error = 2
too_many_lines = 3
OTHERS = 4.
IF sy-subrc <> 0.
MESSAGE i032 ."Error in Displaying
LEAVE LIST-PROCESSING.
ENDIF.
*After that in PAI of the screen, you need to free the *object while going back from the screen(according to *your requirement)
MODULE user_command_9001 INPUT.
CASE sy-ucomm.
WHEN 'EXIT' OR 'CANC'.
PERFORM f9600_free_objects:
USING o_alvgrid 'ALV' text-e02,
USING o_dockingcontainer 'DOCKING'
text-e01.
LEAVE PROGRAM.
ENDCASE.
ENDMODULE. " USER_COMMAND_9001 INPUT
*in the program, write the follwoing code
FORM f9600_free_objects USING pobject
value(ptype)
value(ptext).
DATA: l_objectalv TYPE REF TO cl_gui_alv_grid.
CASE ptype.
WHEN 'ALV'.
l_objectalv = pobject.
IF NOT ( l_objectalv IS INITIAL ).
CALL METHOD l_objectalv->free
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
OTHERS = 3.
CLEAR: pobject, l_objectalv.
PERFORM f9700_error_handle USING ptext.
ENDIF.
WHEN 'DOCKING'.
DATA: lobjectdock TYPE REF TO cl_gui_docking_container.
lobjectdock = pobject.
IF NOT ( lobjectdock IS INITIAL ).
CALL METHOD lobjectdock->free
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
OTHERS = 3.
CLEAR: pobject, lobjectdock.
PERFORM f9700_error_handle USING ptext.
ENDIF.
WHEN 'CONTAINER'.
DATA: lobjectcontainer TYPE REF TO cl_gui_container.
lobjectcontainer = pobject.
IF NOT ( lobjectcontainer IS INITIAL ).
CALL METHOD lobjectcontainer->free
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
OTHERS = 3.
CLEAR: pobject, lobjectcontainer.
PERFORM f9700_error_handle USING ptext.
ENDIF.
WHEN OTHERS.
sy-subrc = 1.
PERFORM f9700_error_handle USING
text-e04.
ENDCASE.
ENDFORM. " f9600_free_objects
FORM f9700_error_handle USING value(ptext).
IF sy-subrc NE 0.
CALL FUNCTION 'POPUP_TO_INFORM'
EXPORTING
titel = text-e03
txt2 = sy-subrc
txt1 = ptext.
ENDIF.
endform.
also check with this
http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCSRVALV/BCSRVALV.pdf
Hope this helps
if it helped, you can acknowledge the same by rewarding
regards
dinesh

Model provider class and data provider class

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