What are exception class and persistant class?

hi,
what are exception class and persistant class?
how are they different from the normal class?
Regards,
Anil

Hii!
Persistent Classes
To use the Persistence Service for objects, the classes of these objects must be created as persistent classes in the Class Builder. The term persistent class does not imply that a class is persistent. (As a template for objects, every class is persistent). Rather, it means that the objects of that class and their state are managed by the Persistence Service. For example, the objects of these classes are instantiated in the ABAP program with a method of the Persistence Service, which ensures that the initialization is correct (not with the usual CREATE OBJECT statement). When the Class Builder creates a persistent class, it automatically generates an associated class, known as the class actor or class agent, whose methods manage the objects of persistent classes. As well as their identity, persistent classes can contain key attributes, which allow the Persistence Service to ensure that the content of each persistent object is unique.
Check out this link
http://www.sapnet.ru/abap_docu/ABENABAP_EXCEPTION_CLASSES.htm
Regards
Abhijeet

Similar Messages

What is the relation between main class and inner classes

hi
i want to make a UML design and o want to know how to draw the relation betwwen the main public class and inner classes?
and what is the relation?

BaffyOfDaffyA wrote:
Please keep in mind that if you spell better you will get better answers and if you add duke stars you will get better answers and if you mark the thread as a question you will get better answers. That will make it look like you are paying attention and that you really want an answer.
My best answer based on your rather vague question:
A minimal public class in a file named "Minimal.java" in the directory named "minimal":
package minimal;
public class Minimal {
private int variable;
public Minimal(int var) {
variable = var;
public int getVariable() {
return variable;
}This would be an example of adding an inner class:
package minimal;
public class Minimal {
private int variable;
public Minimal(int var) {
variable = var;
public int getVariable() {
return variable;
public class Inner {
private int innerVariable;
public Inner(int var) {
innerVariable = var;
public int getInnerVariable() {
return innerVariable;
}The inner class is exactly like any other inner class except if you are accessing it from anything else other than Minimal then you would have to add Minimal. right before Inner for example, where the Minimal class could use
Inner inner = new Inner(5);other classes would have to use
Minimal.Inner inner = new Minimal.Inner(5);
See [Inner Class Example|http://java.sun.com/docs/books/tutorial/java/javaOO/innerclasses.html] or [Nested Classes|http://java.sun.com/docs/books/tutorial/java/javaOO/nested.html] for more information.
He is probably not asking what an inner class is or how to declare one in raw source code. To me he is asking how do I
explain this relationship in a UML diagram and as UML is not and exact science and expression can vary a lot
between UML design applications I didn't want to stab in the dark.
@OP I would say whatever seems most logical to you and your team, write something that reads.

What are the major components in class?

1)     What is the purpose of load-of-program? When it will be trigger?
2)     Write the code for displaying the three parameters in single line with the first parameter as mandatory in the selection screen?
3)     Which event triggered whenever the user call the function BACK, EXIT, CANCEL?
4)     What are the major components in class?
5)     What is the functional module is used to get popup screen for ALV reports?
6)     Which type of pool is used to get drop-down list?
7)     What is the tcode for creating the variant truncations?
8)     Is it possible to call LDBs number of times in same report?
9)     What are the conditions to use control break statements in our report program?
10)     What is the use of range statement?
11)     What is the difference between normal reports and alv reports? With comparing to normal report are there any disadvantages in alv reports?
12)     What are the components used to suppress the fields in the selection-screen?
13)     What is the standard program to transport selection screen variants?
14)     What is the event keyword for defining event block for reporting events?
15)     What is the specific statement use when writing a drill down report?
16)     What are the different tools to report data in sap?
17)     Write the menu path to create a selection text in reports?
18)     How do we omit the leading zero s while formatting outputs in reports?
19)     What are the report truncations?
20)     How do we align selection input in single row?
21)     How do we suppress the display of input fields on selection screen?

this forum is not for answering your interview questions...if you stucked with any realtime problem then post...please try to respect forum terms and conditions.
Thank you.

What is the difference between document class and normal class

Hi,
Please let me know what is the difference between document class and normal class.
And I have no idea which class should call as document class or call as an object.
Thanks
-Actionscript Developer

the document class is invoked immediately when your swf opens. the document class must subclass the sprite or movieclip class.
all other classes are invoked explicitly with code and need not subclass any other class.

What are the steps to create classes?

What are the steps to create classes?

Hello.
Here's one example applied to a BSP page.
How to create your first OO Abap Class for a BSP
Kind regards.
Bruno

What are filed simbols and filed groups

what are filed simbols and filed groups?
Regards,
pandu.

Hi
Field Symbols
Field symbols are placeholders or symbolic names for other fields. They do not physically reserve space for a field, but point to its contents. A field symbol cam point to any data object. The data object to which a field symbol points is assigned to it after it has been declared in the program.
Whenever you address a field symbol in a program, you are addressing the field that is assigned to the field symbol. After successful assignment, there is no difference in ABAP whether you reference the field symbol or the field itself. You must assign a field to each field symbol before you can address the latter in programs.
Field symbols are similar to dereferenced pointers in C (that is, pointers to which the content operator * is applied). However, the only real equivalent of pointers in ABAP, that is, variables that contain a memory address (reference) and that can be used without the contents operator, are reference variables in ABAP Objects.
All operations programmed with field symbols are applied to the field assigned to it. For example, a MOVE statement between two field symbols moves the contents of the field assigned to the first field symbol to the field assigned to the second field symbol. The field symbols themselves point to the same fields after the MOVE statement as they did before.
You can create field symbols either without or with type specifications. If you do not specify a type, the field symbol inherits all of the technical attributes of the field assigned to it. If you do specify a type, the system checks the compatibility of the field symbol and the field you are assigning to it during the ASSIGN statement.
Field symbols provide greater flexibility when you address data objects:
If you want to process sections of fields, you can specify the offset and length of the field dynamically.
You can assign one field symbol to another, which allows you to address parts of fields.
Assignments to field symbols may extend beyond field boundaries. This allows you to address regular sequences of fields in memory efficiently.
You can also force a field symbol to take different technical attributes from those of the field assigned to it.
The flexibility of field symbols provides elegant solutions to certain problems. On the other hand, it does mean that errors can easily occur. Since fields are not assigned to field symbols until runtime, the effectiveness of syntax and security checks is very limited for operations involving field symbols. This can lead to runtime errors or incorrect data assignments.
While runtime errors indicate an obvious problem, incorrect data assignments are dangerous because they can be very difficult to detect. For this reason, you should only use field symbols if you cannot achieve the same result using other ABAP statements.
For example, you may want to process part of a string where the offset and length depend on the contents of the field. You could use field symbols in this case. However, since the MOVE statement also supports variable offset and length specifications, you should use it instead. The MOVE statement (with your own auxiliary variables if required) is much safer than using field symbols, since it cannot address memory beyond the boundary of a field. However, field symbols may improve performance in some cases.
check the below links u will get the answers for your questions
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/content.htm
http://www.sts.tu-harburg.de/teaching/sap_r3/ABAP4/field_sy.htm
http://searchsap.techtarget.com/tip/1,289483,sid21_gci920484,00.html
Syntax Diagram
FIELD-SYMBOLS
Basic form
FIELD-SYMBOLS <fs>.
Extras:
1. ... TYPE type
2. ... TYPE REF TO cif
3. ... TYPE REF TO DATA
4. ... TYPE LINE OF type
5. ... LIKE s
6. ... LIKE LINE OF s
7. ... TYPE tabkind
8. ... STRUCTURE s DEFAULT wa
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas. See Cannot Use Untyped Field Symbols ad Cannot Use Field Symbols as Components of Classes.
Effect
This statement declares a symbolic field called <fs>. At runtime, you can assign a concrete field to the field symbol using ASSIGN. All operations performed with the field symbol then directly affect the field assigned to it.
You can only use one of the additions.
Example
Output aircraft type from the table SFLIGHT using a field symbol:
FIELD-SYMBOLS <PT> TYPE ANY.
DATA SFLIGHT_WA TYPE SFLIGHT.
ASSIGN SFLIGHT_WA-PLANETYPE TO <PT>.
WRITE <PT>.
Addition 1
... TYPE type
Addition 2
... TYPE REF TO cif
Addition 3
... TYPE REF TO DATA
Addition 4
... TYPE LINE OF type
Addition 5
... LIKE s
Addition 6
... LIKE LINE OF s
Addition 7
... TYPE tabkind
Effect
You can define the type of the field symbol using additions 2 to 7 (just as you can for FORM parameters (compare Defining the Type of Subroutine Parameters). When you use the ASSIGN statement, the system carries out the same type checks as for USING parameters of FORMs.
This addition is not allowed in an ABAP Objects context. See Cannot Use Obsolete Casting for FIELD SYMBOLS.
In some cases, the syntax rules that apply to Unicode programs are different than those for non-Unicode programs. See Defining Types Using STRUCTURE.
Effect
Assigns any (internal) field string or structure to the field symbol from the ABAP Dictionary (s). All fields of the structure can be addressed by name: <fs>-fieldname. The structured field symbol points initially to the work area wa specified after DEFAULT.
The work area wa must be at least as long as the structure s. If s contains fields of the type I or F, wa should have the structure s or at least begin in that way, since otherwise alignment problems may occur.
Example
Address components of the flight bookings table SBOOK using a field symbol:
DATA SBOOK_WA LIKE SBOOK.
FIELD-SYMBOLS <SB> STRUCTURE SBOOK
DEFAULT SBOOK_WA.
WRITE: <SB>-BOOKID, <SB>-FLDATE.
Field Groups
Field groups use a mechanism called extract to store and process data. You define a header and then line structure and the fields that you would like those to have and process them fairly similarly to a table; unless you are dealing with millions of records.
Since internal tables have fixed line structures, they are not suited to handle data sets with varying structures.
An extract is a sequential dataset in the memory area of the program. You can only address the entries in the dataset within a special loop. The index or key access permitted with internal tables is not allowed. You may only create one extract in any ABAP program. The size of an extract dataset is, in principle, unlimited. Extracts larger than 500KB are stored in operating system files. The practical size of an extract is up to 2GB, as long as there is enough space in the file-system.
Reward points if this explains well
Kiran

Singleton pattern class and static class

Hi,
what is difference between the singleton pattern class and static class ?
in singleton pattern, we declare a static member[which hold one value at a time] ,static method[ which return static member value] and a private constructor[not allow to direct instantiation]. My words are -- as a singleton pattern we implement static class .
so can we say a singleton pattern is static class it means both are same or is any difference between these two ??

malcolmmc wrote:
On several occasions I've had to convert a static (never instanceated) class to a singleton type, for example because I realise I need an instance per thread, or I decide to make a program more modular, with more than one configuration.
I've never done the opposite.
So generally I favour the singleton if there any "state" involved, because it's more flexible in unanticipated directions. It also gives extra flexibility when building tests, especially if you program to an interface.Total agreement; if anything it is dead hard to override static method logic with mock code in unit tests (I had to do it by keeping the static methods in place but making them internally use a singleton instance of itself of which the instance variable could be overwritten with a mock implementation for unit testing purposes...).
'Static classes' and/or methods are great for very simple util functions, but I wouldn't use them for anything other than that.

Processing classes, cumulation classes and evaluation classes

Hi Friends,
What is the diff between processing classes, cumulation classes and evaluation classes. where we see these three and what is the table no. for this?

.) Processing Class - A wage type characteristic that controls processing during Payroll. There are different processing classes for the various processing steps that are performed within Payroll. During the payroll run, SAP R/3 processes a wage type in a specific processing step according to its individual specification in the respective processing class.
Cumulation class - Cumulation class are used to cumulate the model wage types to generate the /1** technical wage types.
Example - Processing class 20 is used for cumulation and processed by PCR X023. Now suppose you have set specifiction as 8. Now if you will check PCR X023 for spec 8, it says to cumulate wage type into cumulation class which are ticked. Like may be you want to cumulate a model wage type into /101, set PCL 20 as 8 and tick cumulation class 1.
Evaluation Class - Wage type characteristic that controls processing when payroll results are evaluated and displayed. There are various evaluation classes for the different processing steps that are performed when payroll results are evaluated and displayed.
Example
In the standard system, the specifications for evaluation class 02 determine how a wage type is printed on a form that is payslip.
Specification 00: no printing on the form
Specification 01: prints personal payments/deductions
Specification 02: prints wage types included in the total gross amount
Specification 03: prints wage types derived from time-based payments and included in the total gross amount

Data class and storage class

Hi ,
I need some info or docs on data class and stroge class of DSO /cube.
Regards
tapashi

Hi Tapashi,
Something i found about dataclass in DSO/Cube, which might be useful to you.
Within SAP BW following data class of DDIC objects are important:
DDIM           Dimension Tables in BW of InfoCubes
DFACT          Facts Table in BW of InfoCubes
DODS           ODS Tables in BW
These have been introduced in order to improve performance while reading/writing InfoProviders. Settings of data class are maintained in "Technical Settings -> Database storage parameters" screen of TA SE11. Data class is assigned to the database tables of the InfoCube (table RSDCUBE, RSDODSO). Notice that this assignment cannot be made by any circumstances by user, only system does this while you activate InfoProvider.
Subsequently see overview of table RSDCUBEu2019s fields with link to data class according BW versions:
SAP BW 3.x (parameters only affect aggregates, not the cube):
AGGRDATCLS     Data class for aggregate fact tables (only aggregates)
AGGRSIZCAT     Size category for aggregate fact tables
ADIMDATCLS     Data class for aggregate dimension tables
ADIMSIZCAT     Size category for aggregate dimension tables
Furthermore see overview of RSDODSOu2019s fields for DSO objects as InfoProvider with link to data class:
ODSADATCLS     Data class for table with active data of the ODS
ODSMDATCLS     Data class for table with ODS input data
To see all available data classes check table: DDART (DD: Data Class in Technical Settings)
To see all available size categories check table: DGKAT (DD: Size category in technical settings)
Hope this is helpful.
Regards
Snehith

LinkedList class and ArrayList class

Hi everyone,
What is difference between LinkedList class and ArrayList class ??

Hi samue!
If you had typed that question you would have got many answers.anyway
difference between Linked List and ArrayList
1.In linked list each element is stored as an object but not in arraylist
2.Linked list need iterator to go through its contents but not arraylist
3.reading element from each takes same time but if you want to add or remove element from the arraylist it takes considerable amount of time depending on the index number. in Linkedlist case it takes constant amount of time to add/remove at any index.
this should be enough guess to know the difference but if u need try goooogle

Difference between Data Class and Delivery Class

What is the Difference between Data Class and Delivery Class , what happens Phisically to the Data .
Moderator message: what is the difference between your question and a question that we'd welcome here in the forums?
[Rules of engagement|http://wiki.sdn.sap.com/wiki/display/HOME/RulesofEngagement]
Edited by: Thomas Zloch on Nov 22, 2010 1:17 PM

What is the Difference between Data Class and Delivery Class , what happens Phisically to the Data .
Moderator message: what is the difference between your question and a question that we'd welcome here in the forums?
[Rules of engagement|http://wiki.sdn.sap.com/wiki/display/HOME/RulesofEngagement]
Edited by: Thomas Zloch on Nov 22, 2010 1:17 PM

Difference between Material Class and Batch Class

Hi!
What is the difference between Material Class and Batch Class?
and how can we use these classes?
Rgds,
Ajit

Iam not sure but i think
1) Material class for sorting purpose
2) Batch Class for Batch Management
thanks
K.Prabakaran

Owner Class and Base Class ?

hi,
What is an Owner class and base class?
thanks,
Hanu

Hi,
the question is related to oracle java class or samething else?
I dont understand your question.
Regards,
Tom

Evaluation classes and cumulation classes

Hi All ,
Can anybody give the information about evaluation classes and cumulation classes in HR and how they affects the payroll.It is better for me if any one give the scenario to understand these concepts.I know the basics of these things i.e in which view these details are maintained for wagtypes.
Thanks in advance.
Regards ,
Santosh.

Hi Santosh,
For any wagetype to process in payroll these cummulation class and evlatuion class is important.As payroll is Country specific each county has specific base for calculating Cummulation class.
Cummulation Class: In payroll there are two types of cummulation
(a) Cummulation of wage types over another wage type
(b) Cummulation of wage types over a period of time
For the first one it is used to calculate the base for different tax calculation. It is represented by /1 series wage types. Examples For HRA Basis it is /111 and the base is mainly Basic+DA...etc.
For the second one it is calculated by Processing class 30 Specification 0,1,2,3 and T. The related tables are V-T54c1, V_T54c4 and V_T54c3
Evaluation Class: This is used mainly for reports i,e Form 16, Form 24, Payslips etc. In India mostly used Evaluation classes are
02 - For Payments and Deductions in Payslip
06 - For Sec 17(1) For Total Gross
07 - For Sec 10 Deductions
09 - For Sec 17(3) For Perks
08 - For Sec 17(2) For Income from other sources
11 - For Sec 217 2 (A)
* All these reports you can see in table V-T512w_D or V_t512w_O
I think this will help you
Best Regards
Baidya

Processing classes and evaluation classes

hi there could some one tell me the best site to understand processing classes and evalution classes of Great Britian Payroll.(or anyother documentation)
many thanks
srikanth

These are a few which are Uk specific.But I dont want to proof anything to you .So if you dont tell me why you require the meaning of a PR class I dont think I can help you. Thanks anyways.
50 Deductions processing using 'Ba
61 Deduct GB court orders from net
62 Deduct from taxable pay -->CYCL
63 GB deductions from working net
64 GB SSP/SMP absence amounts -->

What are exception class and persistant class?

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