OOABAP

(1)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnAABBAAPP 1111

Object

Object-

-Oriented

Oriented

Programming in

ABAP

Presented by

Pooja Nayak

(2)

SESSION OVERVIEW

  

 What is Object Orientation?What is Object Orientation?What is Object Orientation?What is Object Orientation?



 AttriAttriAttriAttributes of butes of butes of butes of Object Oriented ProgrammingObject Oriented ProgrammingObject Oriented ProgrammingObject Oriented Programming



 ABAP ObjectsABAP ObjectsABAP ObjectsABAP Objects



 How to implement classes,events...How to implement classes,events...How to implement classes,events...How to implement classes,events...



 Advantages of OOP in Advantages of OOP in Advantages of OOP in Advantages of OOP in ABAABAABAABAPPPP



 SAP Business ObjectsSAP Business ObjectsSAP Business ObjectsSAP Business Objects



(3)

OOPS in ABAP OOPS in ABAP O

OOOPPSSiinnAABBAAPP 3333

What is Object

Orientatio

n?

What is Object

Orientatio

n?

  

 Type of problemType of problemType of problem-Type of problem--solving method in which the software-solving method in which the softwaresolving method in which the ssolving method in which the softwareoftware solution reflects real

solution reflects real solution reflects

real-solution reflects real--world objects.-world objects.world objects.world objects.

  

 Emphasis is given to data rather than to Emphasis is given to data rather than to Emphasis is given to data rather than to Emphasis is given to data rather than to proceduresproceduresproceduresprocedures 

 

 Data is hidden and cannot be accessed by externalData is hidden and cannot be accessed by externalData is hidden and cannot be accessed by externalData is hidden and cannot be accessed by external functions.

functions. functions. functions.

Merits Of Object

Merits Of Object OrientationOrientation Merits Of Object

Merits Of Object OrientationOrientation

  

 Complex software systems become easier toComplex software systems become easier toComplex software systems become easier toComplex software systems become easier to understand. understand. understand. understand.   

 OO systems are easier to scale by using OO systems are easier to scale by using OO systems are easier to scale by using OO systems are easier to scale by using the concept of the concept of the concept of the concept of reusability.

reusability. reusability. reusability.

(4)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnAABBAAPP 4444 Classes Classes Data Encapsulation Data Encapsulation Inheritance Inheritance Polymorphism Polymorphism

Attributes of Object

Oriented

Attributes of Object

Oriented

Programming

Objects Objects

(5)

OBJECTS

  

 Is any realIs any realIs any real-Is any real--time entity (eg. Employee, customer etc )-time entity (eg. Employee, customer etc )time entity (eg. Employee, customer etc )time entity (eg. Employee, customer etc ) 

 

 Contains data and behaviour.Contains data and behaviour.Contains data and behaviour.Contains data and behaviour. 

 

 Operations are done through Operations are done through Operations are done through Operations are done through message passing.message passing.message passing.message passing. 

 

 Format of message isFormat of message isFormat of message isFormat of message is

message:[destination,operation,parameters] message:[destination,operation,parameters] message:[destination,operation,parameters] message:[destination,operation,parameters]

destination

destination receiver receiver object object stimulated stimulated by by messagemessage destination

destination receiver receiver object object stimulated stimulated by by messagemessage operation

operation method method that that is is to to receive receive the the messagemessage operation

operation method method that that is is to to receive receive the the messagemessage parameters

parameters informatioinformation n needed needed for for operation operation to to bebe parameters

parameters informatioinformation n needed needed for for operation operation to to bebe successful.

successful. successful. successful.

(6)

CLASS

  

 Central element of object orientation.Central element of object orientation.Central element of object orientation.Central element of object orientation. 

 

 Abstract description of an object. Abstract description of an object. Abstract description of an object. Abstract description of an object. 

 

 Defines state and behaviour of objects.Defines state and behaviour of objects.Defines state and behaviour of objects.Defines state and behaviour of objects.

Structure of Class Structure of Class Structure of Class Structure of Class   

 Classes contain Classes contain Classes contain Classes contain componentcomponentcomponentcomponents.s.s.s. 

 

 Each component is assigned a visibility section.Each component is assigned a visibility section.Each component is assigned a visibility section.Each component is assigned a visibility section. 

 

(7)

Data

Encapsulatio

n

Data

Encapsulatio

n

  

 Protective covering preventing data and code fromProtective covering preventing data and code fromProtective covering preventing data and code fromProtective covering preventing data and code from being defined outside the covering.

being defined outside the covering. being defined outside the covering. being defined outside the covering.

  

 Each obj. has an interface, which determines howEach obj. has an interface, which determines howEach obj. has an interface, which determines howEach obj. has an interface, which determines how other obj. can interact with it.

other obj. can interact with it. other obj. can interact with it. other obj. can interact with it.

  

 Objs restrict visibility of their resources to other users.Objs restrict visibility of their resources to other users.Objs restrict visibility of their resources to other users.Objs restrict visibility of their resources to other users. 

 

 Three visibility mechanisms.Three visibility mechanisms.Three visibility mechanisms.Three visibility mechanisms.



 Private sectionPrivate sectionPrivate sectionPrivate section



 Public sectionPublic sectionPublic sectionPublic section



 Protected sectionProtected sectionProtected sectionProtected section

  

 All component All component All component All components s s s defined in public section are defined in public section are defined in public section are defined in public section are accessibleaccessibleaccessibleaccessible to all users of the c

to all users of the class, methods of the class and anylass, methods of the class and any to all users of the c

to all users of the class, methods of the class and anylass, methods of the class and any inherited classes.

inherited classes. inherited classes. inherited classes.

(8)

Data Encapsulation contd..

  

 All component All component All component All components s s s declared in private section are declared in private section are declared in private section are declared in private section are onlyonlyonlyonly visible in the methods of same class.

visible in the methods of same class. visible in the methods of same class. visible in the methods of same class.

  

 All components declared in protected section are All components declared in protected section are All components declared in protected section are All components declared in protected section are visiblevisiblevisiblevisible to method

to methods s of the class and those cof the class and those classes that inheritlasses that inherit to method

to methods s of the class and those cof the class and those classes that inheritlasses that inherit from this class.

from this class. from this class. from this class.

  

 Interfaces completely describes how the user of Interfaces completely describes how the user of Interfaces completely describes how the user of Interfaces completely describes how the user of thethethethe class interacts with it.

class interacts with it. class interacts with it. class interacts with it.

  

 Attributes will be hidden and user will use methods of Attributes will be hidden and user will use methods of Attributes will be hidden and user will use methods of Attributes will be hidden and user will use methods of class to manipula

class to manipulate te the data.the data. class to manipula

(9)

INHERITANCE

  

 RelationshiRelationshiRelationshiRelationship in p in p in p in which a class (subclass) inheritswhich a class (subclass) inheritswhich a class (subclass) inheritswhich a class (subclass) inherits the main features of another

the main features of another class (superclass).class (superclass). the main features of another

the main features of another class (superclass).class (superclass).

  

 Subclass can add new Subclass can add new Subclass can add new Subclass can add new components (attributes, methods,components (attributes, methods,components (attributes, methods,components (attributes, methods, events)

events) and reand replace inhplace inherited methoerited methods with ds with its its ownown events)

events) and reand replace inhplace inherited methoerited methods with ds with its its ownown implementation. implementation. implementation. implementation.   

 Types of InheritanceTypes of InheritanceTypes of InheritanceTypes of Inheritance

1) 1) 1)

1) Single level InheritanceSingle level InheritanceSingle level InheritanceSingle level Inheritance 2)

2) 2)

2) MultipleMultipleMultipleMultiple 3)

3) 3)

3) HierarchicalHierarchicalHierarchicalHierarchical 4)

4) 4)

(10)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnABABAAPP 10101100

POLYMORPHISM

  

 Comes from the Greek word ³many forms´.Comes from the Greek word ³many forms´.Comes from the Greek word ³many forms´.Comes from the Greek word ³many forms´. 

 

 Allows one interface to be used for a general class of Allows one interface to be used for a general class of Allows one interface to be used for a general class of Allows one interface to be used for a general class of actions. actions. actions. actions.   

 When objects from different classes react differently toWhen objects from different classes react differently toWhen objects from different classes react differently toWhen objects from different classes react differently to the same procedural call.

the same procedural call. the same procedural call. the same procedural call.

  

 User can work with different classes User can work with different classes User can work with different classes User can work with different classes in a similar way,in a similar way,in a similar way,in a similar way, regardless of their

regardless of their implemeimplementation.ntation. regardless of their

regardless of their implemeimplementation.ntation.

  

 Allows improved code organization and readability as Allows improved code organization and readability as Allows improved code organization and readability as Allows improved code organization and readability as well

well as as creation creation of of ³extensible´ programs.³extensible´ programs. well

(11)

ABAP Objects

  

 Complete set of ObjectComplete set of ObjectComplete set of Object-Complete set of Object--Oriented statements introduced-Oriented statements introducedOriented statements introducedOriented statements introduced

in

in conventional conventional ABAP.ABAP.

in

in conventional conventional ABAP.ABAP.



 ABAP Objects was introduced with SAP Basis Release ABAP Objects was introduced with SAP Basis Release ABAP Objects was introduced with SAP Basis Release ABAP Objects was introduced with SAP Basis Release

4.5 4.5 4.5 4.5   

 Classes, Interfaces, EventsClasses, Interfaces, EventsClasses, Interfaces, EventsClasses, Interfaces, Events



 ABAP Objects was completed with SAP Basis Release ABAP Objects was completed with SAP Basis Release ABAP Objects was completed with SAP Basis Release ABAP Objects was completed with SAP Basis Release

4.6 4.6 4.6 4.6   

 Inheritance, Dynamic InvokeInheritance, Dynamic InvokeInheritance, Dynamic InvokeInheritance, Dynamic Invoke



 Some enhancements were added with SAP WSome enhancements were added with SAP Web Applicationeb Application

Server, Releases 6.10, 6.20.



(12)

OOOPPSSiinnABABAAPP 12121122

ABAP Objects contd..

Runtime environment Runtime environment Runtime environment Runtime environment   

 ABAP Workbench allows you to create R/3 Repository ABAP Workbench allows you to create R/3 Repository ABAP Workbench allows you to create R/3 Repository ABAP Workbench allows you to create R/3 Repository Objects like programs, lock objects and so on.

Objects like programs, lock objects and so on. Objects like programs, lock objects and so on. Objects like programs, lock objects and so on.

  

 Using Function Modules, we can encapsulate functionsUsing Function Modules, we can encapsulate functionsUsing Function Modules, we can encapsulate functionsUsing Function Modules, we can encapsulate functions in different programs with defined interfaces.

in different programs with defined interfaces. in different programs with defined interfaces. in different programs with defined interfaces.

  

 Object Oriented enhancement of ABAP is based Object Oriented enhancement of ABAP is based Object Oriented enhancement of ABAP is based Object Oriented enhancement of ABAP is based onononon models of Java and C++.

models of Java and C++. models of Java and C++. models of Java and C++. Object References Object References Object References Object References   

 Used to access objects from ABAP program Used to access objects from ABAP program Used to access objects from ABAP program Used to access objects from ABAP program andandandand contained in

contained in contained in

(13)

ABAP Objects contd«

  

 Two types of referencesTwo types of referencesTwo Two types types of of references references ---- Class ReferencesClass ReferencesCCllaasss s RReeffeerreenncceess

Interface References. Interface References. Interface References. Interface References.   

 Class References are defined using the Class References are defined using the Class References are defined using the Class References are defined using the additionadditionadditionaddition

in the TYPES or DATA statement.

in the TYPES or DATA statement. 

 

 It allows the user to create an It allows the user to create an It allows the user to create an It allows the user to create an instance of theinstance of theinstance of theinstance of the

class. class. class. class.   

 Interface References are defined using theInterface References are defined using theInterface References are defined using theInterface References are defined using the

addition

«

« TYPE REF TO <intf>TYPE REF TO <intf>

«

« TYPE REF TO <intf>TYPE REF TO <intf>

in the TYPES or DATA statement.

in the TYPES or DATA statement. 

 

 <<<<intf> should be declared before intf> should be declared before intf> should be declared before intf> should be declared before actual reference declarationactual reference declarationactual reference declarationactual reference declaration

occurs.

(14)

ABAP Objects contd«

  

 After creating a reference variable for a After creating a reference variable for a After creating a reference variable for a After creating a reference variable for a class, you canclass, you canclass, you canclass, you can create an object using the statement

create an object using the statement create an object using the statement create an object using the statement

CREATE CREATE CRE

CREATATE E OBJECTOBOBOBJECTJEJECTCT <cref>.<cref>.<cref>.<cref>. 

 

 This creates an instance of the object This creates an instance of the object This creates an instance of the object This creates an instance of the object andandandand <<<<cref>cref>cref>cref>

contains the reference to the object. contains the reference to the object. contains the reference to the object. contains the reference to the object. Addressing the components of

Addressing the components of objectsobjects Addressing the components of

Addressing the components of objectsobjects Instance c

Instance componenomponentsts Instance c

Instance componenomponentsts

  

 To access attributesTo access attributesTo access attributesTo access attributes <<<<attr>:attr>:attr>:attr>: <c <c <c <cref> -ref> ref> -ref> -> -> > > < < < <attr> attr> attr> attr>

  

 To access methodsTo access methodsTo access methodsTo access methods <<<<meth>:meth>:meth>:meth>: CALLCALLCACALL LL METHOD METHODMETMETHOHODD <cref><cref><cref>-<cref>-->->>> <meth>

<meth>

(15)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnABABAAPP 15151155 Static components Static components Static components Static components   

 To access attributesTo access attributesTo access attributesTo access attributes <<<<attr>:attr>:attr>:attr>: <<<<class> =>class> =>class> =>class> => <<<<attr>.attr>.attr>.attr>.

  

 To access methodsTo access methodsTo access methodsTo access methods <<<<meth>:meth>:meth>:meth>: CCCCAAALLALLLLLL METHODMETHODMEMETHTHODOD <<<<class>class>class>class> => => <<meth>meth> => => <<meth>meth>   

 Within a class, you can access individual Within a class, you can access individual Within a class, you can access individual Within a class, you can access individual componencomponencomponencomponentstststs using the keyword ME.

using the keyword ME. using the keyword ME. using the keyword ME.

  

 For example: MEFor example: ME -For example: ME -For example: ME ->->>> <<<<attr>attr>attr>attr>

C

C_ALL_ALL

C

(16)

Classes in ABAP

Types of Classes Types of Classes Types of Classes Types of Classes Local Classes Local Classes Local Classes Local Classes   

 Defined within ABAP program.Defined within ABAP program.Defined within ABAP program.Defined within ABAP program. 

 

 Can be used only with that program.Can be used only with that program.Can be used only with that program.Can be used only with that program.

Global Classes Global Classes Global Classes Global Classes   

 Defined in class builder SE24.Defined in class builder SE24.Defined in class builder SE24.Defined in class builder SE24. 

 

 Stored centrally in class library in R/3 repository.Stored centrally in class library in R/3 repository.Stored centrally in class library in R/3 repository.Stored centrally in class library in R/3 repository. 

 

 Can be accessed from all programs in R/3 Can be accessed from all programs in R/3 Can be accessed from all programs in R/3 Can be accessed from all programs in R/3 system.system.system.system. 

 

 For eg.For eg.For eg.For eg. CL_GUI_ALV_GCL_GUI_ALV_GRRID,ID,

CL_GUI_CUS

(17)

Defining local classes in ABAP

  

 The The The The main main main main components components components components are are are are AttributesAttributesAttributesAttributes, , , , Methods Methods Methods Methods andandandand Events. Events. Events. Events.   

 In ABAP, classes are defined between CLASS andIn ABAP, classes are defined between CLASS andIn ABAP, classes are defined between CLASS andIn ABAP, classes are defined between CLASS and ENDCLASS statements. ENDCLASS statements. ENDCLASS statements. ENDCLASS statements.   

 Class definitiClass definitiClass definitiClass definition on on on consists of declaration andconsists of declaration andconsists of declaration andconsists of declaration and implementation parts. implementation parts. implementation parts. implementation parts.   

 Syntax for class definition isSyntax for class definition isSyntax for class definition isSyntax for class definition is CLASS

CLASS CLASS

CLASS classnameclassnameclassnameclassname _DEFINITION_DEFINITION_DEFINITION_DEFINITION....

PUBLIC PUBLIC PUB

PUBLIC LIC SECSECSECTIONSECTIONTIOTIONN....

*declare public variables and methods.

PRIVATE PRIVATE PRI

PRIVATVATE E SECTIONSECSECSECTIONTIOTIONN....

*declare private data.

ENDCLASS ENDCLASS ENDCLASS ENDCLASS....

(18)

Understandin

g

Classes contd..

Understandin

g

Classes contd..

  

 The syntax for class implementation isThe syntax for class implementation isThe syntax for class implementation isThe syntax for class implementation is

CLASS

CLASS class_name class_name IMPLEMENTATIMPLEMENTATION.ION. CLASS

CLASS class_name class_name IMPLEMENTATIMPLEMENTATION.ION. METHOD CONSTRUCTOR.

METHOD CONSTRUCTOR. METHOD CONSTRUCTOR. METHOD CONSTRUCTOR. *initialisin

*initialising g the variablesthe variables *initialisin

*initialising g the variablesthe variables ENDMETHOD. ENDMETHOD. ENDMETHOD. ENDMETHOD. METHOD method_name. METHOD method_name. METHOD method_name. METHOD method_name.

*write code for the defined methods *write code for the defined methods *write code for the defined methods *write code for the defined methods ENDMETHOD. ENDMETHOD. ENDMETHOD. ENDMETHOD. ENDCLASS. ENDCLASS. ENDCLASS. ENDCLASS.

(19)

Understanding Class Components

Attributes Attributes Attributes Attributes   

 They are internal data variables in a class and can takeThey are internal data variables in a class and can takeThey are internal data variables in a class and can takeThey are internal data variables in a class and can take any ABAP data type.

any ABAP data type. any ABAP data type. any ABAP data type.

  

 Can be classified intoCan be classified intoCan be classified into instanceCan be classified into instanceininstastancence attattatattrtrribribibibuteuteututesesss ananand staticand staticdd staticstatic attributes attributes attributes. attributes...   

 InstanceInstanceInsInstantancece attrattrattattribribibutibututeuteesesss are declared using DATA keywordare decare decare declared using DATA keywordlarelared using DATA ked using DATA keywywordord and determine the state of the instance.

and determine the state of the instance. and determine the state of the instance. and determine the state of the instance.

  

 Must create an object before working with instanceMust create an object before working with instanceMust create an object before working with instanceMust create an object before working with instance attributes. attributes. attributes. attributes.   

 StaticStaStaStatictictic attratatattrtritriibutibutbutbuteseseses are declared using CLASS-are dare dare declared using CLASS-eclaeclared usinred using CLASg CLASSS-DATA-DATADATADATA keyword and determine the state of the class.

keyword and determine the state of the class. keyword and determine the state of the class. keyword and determine the state of the class.

  

 Need not create an object before working with staticNeed not create an object before working with staticNeed not create an object before working with staticNeed not create an object before working with static attributes.

attributes. attributes. attributes.

(20)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnABABAAPP 20202200 Methods Methods Methods( Procedures) Methods( Procedures)( Procedures)( Procedures)

  

 They can access all class attributes and They can access all class attributes and They can access all class attributes and They can access all class attributes and have parameter have parameter have parameter have parameter interface similar to the Function Modules (IMPORTING, interface similar to the Function Modules (IMPORTING, interface similar to the Function Modules (IMPORTING, interface similar to the Function Modules (IMPORTING, EXPORTING, CHANGING). EXPORTING, CHANGING). EXPORTING, CHANGING). EXPORTING, CHANGING).   

 Like Attributes, there are instance methods and staticLike Attributes, there are instance methods and staticLike Attributes, there are instance methods and staticLike Attributes, there are instance methods and static methods. methods. methods. methods.   

 Instance methodInstance methodInstance methodInstance methods are s are s are s are declared using METHODSdeclared using METHODSdeclared using METHODSdeclared using METHODS keywor

keyword and d and can access all the attributes of can access all the attributes of the class.the class. keywor

keyword and d and can access all the attributes of can access all the attributes of the class.the class.

  

 Static methoStatic methoStatic methoStatic methods ds ds ds are declared using CLASSare declared using CLASSare declared using CLASS-are declared using CLASS--METHODS-METHODSMETHODSMETHODS keyword and can access only static attributes of the keyword and can access only static attributes of the keyword and can access only static attributes of the keyword and can access only static attributes of the class.

class. class. class.

(21)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnABABAAPP 21212211   

 The syntax of using methods isThe syntax of using methods isThe syntax of using methods isThe syntax of using methods is

METHO

METHO_DS_DS <met><met>

METHO

METHO_DS_DS <met><met>

I

IMPORTMPORTIINNGG : [: [VALUVALUE(] <iE(] <i I

IMPORTMPORTIINNGG : [: [VALUVALUE(] <iE(] <i_i_i_i_i> [)]TYPE type]> [)]TYPE type]> [)]TYPE type]> [)]TYPE type]

[OPT

[OPT_I_IONON_AL_AL] EXPORT] EXPORT_I_INN_G_G : [: [_VALU_VALUE(] <eE(] <e

[OPT

[OPT_I_IONON_AL_AL] EXPORT] EXPORT_I_INN_G_G : [: [_VALU_VALUE(] <eE(] <e_i_i_i_i> [)] TYPE> [)] TYPE> [)] TYPE> [)] TYPE

type]

[OPT

[OPT_I_IONON_AL_AL]] _C_CHH_A_ANN_GI_GINN_G_G : [: [_VALU_VALUE(] <cE(] <c

[OPT

[OPT_I_IONON_AL_AL]] _C_CHH_A_ANN_GI_GINN_G_G : [: [_VALU_VALUE(] <cE(] <c_i_i_i_i> [)] TYPE> [)] TYPE> [)] TYPE> [)] TYPE

type]

[OPT

[OPT_I_IONON_AL_AL] RET] RET_U_URNRN_I_INN_G_G _VALU_VALUE(<rE(<r

[OPT

[OPT_I_IONON_AL_AL] RET] RET_U_URNRN_I_INN_G_G _VALU_VALUE(<rE(<r₁₁₁₁>)>)>)>)

EX

EX_C_CEPTEPT_I_IONON_S_S: : <e<e

EX

EX_C_CEPTEPT_I_IONON_S_S: : <e<e_i_i_i_i>>>>....

  

 The additions like IMPORTING, EXPORTING etc defineThe additions like IMPORTING, EXPORTING etc defineThe additions like IMPORTING, EXPORTING etc defineThe additions like IMPORTING, EXPORTING etc define attributes of interface parameters like pass

attributes of interface parameters like pass attributes of interface parameters like

pass-attributes of interface parameters like pass--by-byby-by--value-valuevaluevalue (VALUE), its type (TYPE) and if it is optional (like

(VALUE), its type (TYPE) and if it is optional (like (VALUE), its type (TYPE) and if it is optional (like (VALUE), its type (TYPE) and if it is optional (like OPTIONAL).

OPTIONAL). OPTIONAL). OPTIONAL).

(22)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnABABAAPP 22222222 Implementing methods Implementing methods Implementing methods Implementing methods   

 The syntax for implemThe syntax for implemThe syntax for implemThe syntax for implementation of a method isentation of a method isentation of a method isentation of a method is

METHOD

METHOD methodname.methodname.methodname.methodname.

*enter the code here

ENDMETHOD ENDMETHOD ENDMETHOD ENDMETHOD....   

 The interface parameters needn¶t be specified in implemThe interface parameters needn¶t be specified in implemThe interface parameters needn¶t be specified in implemThe interface parameters needn¶t be specified in implementation.entation.entation.entation.



 To handle error situations, statements like RAISETo handle error situations, statements like RAISETo handle error situations, statements like RAISETo handle error situations, statements like RAISE <<<<exception> ,exception> ,exception> ,exception> ,

MESSAGE RAISING etc can be used.

Calling Methods Calling Methods Calling Methods Calling Methods   

 The way of addressing a method depends on the method itself andThe way of addressing a method depends on the method itself andThe way of addressing a method depends on the method itself andThe way of addressing a method depends on the method itself and from where you are calling it.

from where you are calling it.



 The basic form of calling a method isThe basic form of calling a method isThe basic form of calling a method isThe basic form of calling a method is

CALL METHOD methodname.

(23)

Class Definition

-Class Definition -

-> An Example

> An Example

CLASS

CLASS CL_EMPLOYEECL_EMPLOYEE DEFINITION.DEFINITION.

CLASS

CLASS CL_EMPLOYEECL_EMPLOYEE DEFINITION.DEFINITION.

PUBLIC

PUBLIC SECTION.SECTION.

PUBLIC

PUBLIC SECTION.SECTION. TYPE

TYPE_S_S::

TYPE

TYPE_S_S::

BE

BE_GI_GIN OF TN OF T_{_}_{_}EMPEMP_L_LOYEEOYEE_,_,

BE

BE_GI_GIN OF TN OF T_{_}_{_}EMPEMP_L_LOYEEOYEE_,_,

NO TYPE NO TYPE _I,_I, NO TYPE NO TYPE _I,_I, N N_A_AME TYPEME TYPE _S_STRTR_I_INN_G,_G, N N_A_AME TYPEME TYPE _S_STRTR_I_INN_G,_G, EN

EN_D_D OF TOF T_{_}_{_}EMPEMP_L_LOYEE.OYEE.

EN

EN_D_D OF TOF T_{_}_{_}EMPEMP_L_LOYEE.OYEE.

METHODS METHODS:: METHODS METHODS:: CONSTRUCTOR CONSTRUCTOR CONSTRUCTOR CONSTRUCTOR IMPORTING IMPORTING:: IMPORTING IMPORTING:: I

IMM__EMPEMPLLOYEEOYEE__NO TYPENO TYPE II

I

IMM__EMPEMPLLOYEEOYEE__NO TYPENO TYPE II

I

IMM__EMPEMPLLOYEEOYEE__NNAAME TYPEME TYPE SSTRTRIINNG,G,

I

IMM__EMPEMPLLOYEEOYEE__NNAAME TYPEME TYPE SSTRTRIINNG,G,

DISPLAY_EMPLOYEE.

(24)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnABABAAPP 24242244 METHODS METHODS:: METHODS

METHODS:: DISDISDISDISPPPPLALALALAYYYY____NONONONO____OFOFOFOF____EMPEMPEMPEMPLLLLOYEEOYEEOYEEOYEESSSS....

PROTECTED

PROTECTED SECTION.SECTION.

PROTECTED

PROTECTED SECTION.SECTION.

DATA

DATA ::

DATA

DATA :: G_G_G_G_NONONONO____OFOFOFOF____EMPEMPEMPEMPLLLLOYEEOYEEOYEEOYEESSSS TYPETYPETYPETYPE IIII....

PRIVATE

PRIVATE SECTION.SECTION.

PRIVATE

PRIVATE SECTION.SECTION.

DATA

DATA G_G_G_G_EMPEMPEMPEMPLLLLOYEE TYPE TOYEE TYPE TOYEE TYPE TOYEE TYPE T____EMPEMPEMPEMPLLLLOYEE.OYEE.OYEE.OYEE.

ENDCLASS.

ENDCLASS. CLASSCLASS

ENDCLASS.

ENDCLASS. CLASSCLASS CL_CL_CL_CL_EMPEMPEMPEMPLLLLOYEEOYEEOYEEOYEE IMPLEMENTATION.IMPLEMENTATION.IMPLEMENTATION.IMPLEMENTATION.

METHOD

METHOD CCCCONONONONSSSSTRTRTRTRUCUCUCUCTORTORTORTOR.... G_

G_EMPEMPLLOYEEOYEE

G_

G_EMPEMPLLOYEE-OYEE--NO =-NO =NO =NO = IIIIMMMM____EMPEMPEMPEMPLLLLOYEEOYEEOYEEOYEE____NO.NO.NO.NO.

G_

G_EMPEMPLLOYEEOYEE

G_

G_EMPEMPLLOYEE-OYEE--N-NNNAAAAME =ME =ME =ME = IIIIMMMM____EMPEMPEMPEMPLLLLOYEEOYEEOYEEOYEE____NNNNAAAAME.ME.ME.ME.

G_

G_NONO__OFOF__EMPEMPLLOYEEOYEESS == G_G_NONO__OFOF__EMPEMPLLOYEEOYEESS + 1.+ 1.

G_

ENDMETHOD.

(25)

Class Im

plementatio

n

Class Implementation

-Class Implementation -

-> An Example

> An Example

CLASS

CLASS CL_CL_CL_CL_EMPEMPEMPEMPLLLLOYEEOYEEOYEEOYEE IMPLEMENTATION.IMPLEMENTATION.IMPLEMENTATION.IMPLEMENTATION.

METHOD

METHOD CCCCONONONONSSSSTRTRTRTRUCUCUCUCTORTORTORTOR....

G_

G_EMPEMPLLOYEEOYEE G_

G_EMPEMPLLOYEE-OYEE--NO =-NO =NO =NO = IIIIMMMM____EMPEMPEMPEMPLLLLOYEEOYEEOYEEOYEE____NO.NO.NO.NO. G_

G_EMPEMPLLOYEEOYEE G_

G_EMPEMPLLOYEE-OYEE--N-NNNAAAAME =ME =ME =ME = IIIIMMMM____EMPEMPEMPEMPLLLLOYEEOYEEOYEEOYEE____NNNNAAAAME.ME.ME.ME. G_

G_NONO__OFOF__EMPEMPLLOYEEOYEESS == G_G_NONO__OFOF__EMPEMPLLOYEEOYEESS + 1.+ 1. G_

ENDMETHOD. ENDMETHOD. ENDMETHOD. ENDMETHOD. METHOD METHOD METHOD

METHOD DISDISDISDISPPPPLALALALAYYYY____EMPEMPEMPEMPLLLLOYEE.OYEE.OYEE.OYEE. WR

WR_I_ITE:/ µEmployee Number¶TE:/ µEmployee Number¶_{,G_}_{,G_}EMPEMP_L_LOYEEOYEE_{_}_{_}NO.NO. WR

WRIITE:/ 'Employee Name'TE:/ 'Employee Name',, G_G_EMPEMPLLOYEEOYEE WR

WRIITE:/ 'Employee Name'TE:/ 'Employee Name',, G_G_EMPEMPLLOYEE-OYEE--N-NNNAAAAME.ME.ME.ME.

ENDMETHOD. ENDMETHOD. ENDMETHOD. ENDMETHOD. METHOD METHOD METHOD

METHOD DISDISDISDISPPPPLALALALAYYYY____NONONONO____OFOFOFOF____EMPEMPEMPEMPLLLLOYEEOYEEOYEEOYEESSSS.... WR

WR_I_ITE:/ 'Number of employees is : 'TE:/ 'Number of employees is : '_,_, WR

WR_I_ITE:/ 'Number of employees is : 'TE:/ 'Number of employees is : '_,_, G_

G_NONO__OFOF__EMPEMPLLOYEEOYEESS.. G_

G_NONO__OFOF__EMPEMPLLOYEEOYEESS..

ENDMETHOD. ENDMETHOD. ENDMETHOD. ENDMETHOD. ENDCLASS ENDCLASS ENDCLASS ENDCLASS....

(26)

DATA

DATA :: _{G_}_{G_}EMPEMP_L_LOOYYEEEE1 1 TTYYPPEE RREEFF TTOO _{LCL_}_{LCL_}EMPEMP_L_LOYEE.OYEE.

START

START--OFOF--SELECTION.SELECTION. C

CREREAATE OBJETE OBJECCTT G_G_EMPEMPLLOYEE1OYEE1

EXPORTING

EXPORTING I

IMM__EMPEMPLLOYEEOYEE__NO = 1NO = 1

I

IMM__EMPEMPLLOYEEOYEE__NNAAME = 'John Jones'.ME = 'John Jones'.

CALL

CALL METHOD METHOD G_G_EMPEMPLLOYEE1->OYEE1->DISDISPPLALAYY__EMPEMPLLOYEE.OYEE.

CALL

CALL METHOD METHOD G_G_EMPEMPLLOYEE1->OYEE1->DISDISPPLALAYY__

NO

(27)

(28)

CLASS COMPONENTS contd«

Events Events Events Events   

 Events are used to trigger eventEvents are used to trigger eventEvents are used to trigger event-Events are used to trigger event--handler methods in objects-handler methods in objectshandler methods in objectshandler methods in objects

or classes. or classes. or classes. or classes.   

 When an event is triggered, any no: of handler When an event is triggered, any no: of handler When an event is triggered, any no: of handler When an event is triggered, any no: of handler methods canmethods canmethods canmethods can

be called and the handler determines events to which it want

to react. to react. to react. to react.   

 Events of a class can be triggered in the mEvents of a class can be triggered in the mEvents of a class can be triggered in the mEvents of a class can be triggered in the methods of sameethods of sameethods of sameethods of same

class using RAISE EVENT statement.

class using RAISE EVENT statement. 

 

 A method of same or different class can be declared A method of same or different class can be declared A method of same or different class can be declared A method of same or different class can be declared as anas anas anas an

event handler method f

event handler method for the eventor the event <<evt> of classevt> of class <<class> byclass> by

event handler method f

event handler method for the eventor the event <<evt> of classevt> of class <<class> byclass> by

giving the addition

FOR EVENT

FOR EVENT <<evt> OFevt> OF <<class>.class>.

FOR EVENT

FOR EVENT <<evt> OFevt> OF <<class>.class>.

  

 The link betwThe link betwThe link betwThe link between handler een handler een handler een handler and trigger is established at runtimeand trigger is established at runtimeand trigger is established at runtimeand trigger is established at runtime

using the statement

using the statement SET HANDLER.SET HANDLER.

using the statement

(29)

Handling and Triggering Events

  

 To trigger an event, a class mustTo trigger an event, a class mustTo trigger an event, a class mustTo trigger an event, a class must

a) declare the event in declaration part

b) trigger the event in one of its

b) trigger the event in one of its events.events.

b) trigger the event in one of its

b) trigger the event in one of its events.events.

Declaring Events Declaring Events Declaring Events Declaring Events   

 To declare instance events,To declare instance events,To declare instance events,To declare instance events,

EVENTS

EVENTS <<evt> EXPORTING.. VALUE(evt> EXPORTING.. VALUE(<<ee

EVENTS

EVENTS <<evt> EXPORTING.. VALUE(evt> EXPORTING.. VALUE(<<ee_i_i_i_i>) TYPE type>) TYPE type>) TYPE type>) TYPE type

[OPTIONAL]. [OPTIONAL]. [OPTIONAL]. [OPTIONAL].   

 To declare static To declare static To declare static To declare static events,events,events,events,

CLASS

CLASS-CLASS--EVENTS-EVENTSEVENTSEVENTS <<<<evt>..evt>..evt>..evt>..

Triggering Events Triggering Events Triggering Events Triggering Events   

 Instance events can be triggered by any method in the classInstance events can be triggered by any method in the classInstance events can be triggered by any method in the classInstance events can be triggered by any method in the class

while static events can be done using only static

while static events can be done using only static methods.methods.

while static events can be done using only static

while static events can be done using only static methods.methods.

RAISE EVENT

RAISE EVENT <<evt> EXPORTINGevt> EXPORTING <<ee

RAISE EVENT

(30)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnABABAAPP 30303300 Handling Events Handling Events Handling Events Handling Events   

 To handle an event, a method mustTo handle an event, a method mustTo handle an event, a method mustTo handle an event, a method must

a) be defined as an event handler method for that event.

b) be registered at runtime for the event.



 To declare an event handler method, use To declare an event handler method, use To declare an event handler method, use To declare an event handler method, use following statement.following statement.following statement.following statement.

METHODS

METHODS <<meth> FOR EVENTmeth> FOR EVENT <<evt> OFevt> OF <<cif> IMPORTINGcif> IMPORTING

METHODS

METHODS <<meth> FOR EVENTmeth> FOR EVENT <<evt> OFevt> OF <<cif> IMPORTINGcif> IMPORTING <

<ee <

<ee_i_i_i_i> => => => = <<<<f f f f _i_i_i_i> (for instance method).> (for instance method).> (for instance method).> (for instance method).



 To register event handler method, use the To register event handler method, use the To register event handler method, use the To register event handler method, use the following statement.following statement.following statement.following statement.

SET HANDLER..

SET HANDLER.. <<h>.. FOR..h>.. FOR..

SET HANDLER..

SET HANDLER.. <<h>.. FOR..h>.. FOR..



 After the RAISE EVENT statement, all registered event handler After the RAISE EVENT statement, all registered event handler After the RAISE EVENT statement, all registered event handler After the RAISE EVENT statement, all registered event handler

methods are executed before the next statement is

methods are executed before the next statement is processed.processed.

methods are executed before the next statement is

methods are executed before the next statement is processed.processed.



(31)

Event Handling

-Event Handling -

-> An example

> An example

REPORT Z

REPORT Z_{GAS_}_{GAS_}NEW .NEW .

REPORT Z

REPORT Z_{GAS_}_{GAS_}NEW .NEW .

CLASS

CLASS countercounter DDEFEFIINNIITTIION.ON. CLASS

CLASS countercounter DDEFEFIINNIITTIION.ON.

P

P_U_UBB_LIC_LIC _S_SEE_C_CTT_I_ION.ON.

P

METHO

METHO_DS_DS incrementincrement_{_}_{_}counter.counter.

METHO

METHO_DS_DS incrementincrement_{_}_{_}counter.counter.

EVENTS

EVENTS ccritiriticcalal_{_v}_{_v}aluealue _EXPORTING_EXPORTING

EVENTS

EVENTS ccritiriticcalal_{_v}_{_v}aluealue _EXPORTING_EXPORTING

v

value(exalue(exccess)ess) _TYPE_TYPE ii_._.

v

value(exalue(exccess)ess) _TYPE_TYPE ii_._.

PR

PR_IVA_IVATETE _S_SEE_C_CTT_I_ION.ON.

PR

PR_IVA_IVATETE _S_SEE_C_CTT_I_ION.ON.

DA

DATTAA: : count count TYPE TYPE ii,, DA

DATTAA: : count count TYPE TYPE ii,, threshold

threshold _TYPE_TYPE ii _VALUE_VALUE 1010_._.

threshold

threshold _TYPE_TYPE ii _VALUE_VALUE 1010_._.

EN

EN_DCLASS_DCLASS..

EN

EN_DCLASS_DCLASS..

CLASS

CLASS handlerhandler DDEFEFIINNIITTIION.ON. CLASS

CLASS handlerhandler DDEFEFIINNIITTIION.ON.

P

METHODS

METHODS handlehandle _ _ exexccessess _FOR_FOR _EVENT_EVENT ccritiriticcalal_{_v}_{_v}aluealue

METHODS

METHODS handlehandle _ _ exexccessess _FOR_FOR _EVENT_EVENT ccritiriticcalal_{_v}_{_v}aluealue

OF

OF ccounterounter _IMPORTING_IMPORTING exexccessess_._.

OF

OF ccounterounter _IMPORTING_IMPORTING exexccessess_._.

EN

EN_DCLASS_DCLASS..

EN

(32)

CLASS

CLASS countercounter IIMPMPLLEMENTEMENTAATTIION.ON.

CLASS

CLASS countercounter IIMPMPLLEMENTEMENTAATTIION.ON.

METHO

METHO_D_D incrementincrement_{_}_{_}counter.counter.

METHO

METHO_D_D incrementincrement_{_}_{_}counter.counter.

DA

DATTAA diff TYPE i.diff TYPE i.

DA

DATTAA diff TYPE i.diff TYPE i.

ADD

ADD 1 TO count.1 TO count.

ADD

ADD 1 TO count.1 TO count.

I

IF count > threshold.F count > threshold.

I

IF count > threshold.F count > threshold.

diff = count

-diff = count --- threshold.threshold.tthhrreesshhoolldd..

RAISE

RAISE EVENTEVENT ccritiriticcalal_{_v}_{_v}aluealue

RAISE

RAISE EVENTEVENT ccritiriticcalal_{_v}_{_v}aluealue

EXPORTING

EXPORTING exexccess = diffess = diff_._.

EXPORTING

EXPORTING exexccess = diffess = diff_._.

EN EN_DI_DIF.F. EN EN_DI_DIF.F. EN EN_D_DMETHOMETHO_D_D.. EN EN_D_DMETHOMETHO_D_D.. EN EN_DCLASS_DCLASS EN EN_DCLASS_DCLASS....

(33)

CLASS

CLASS handlerhandler IIMPMPLLEMENTEMENTAATTIION.ON. CLASS

CLASS handlerhandler IIMPMPLLEMENTEMENTAATTIION.ON. METHOD

METHOD handlehandle _ _ exexccessess_._.

METHOD

METHOD handlehandle _ _ exexccessess_._.

WRITE

WRITE: : / '/ 'EExxccess is', exess is', exccessess_._.

WRITE

WRITE: : / '/ 'EExxccess is', exess is', exccessess_._.

ENDMETHOD. ENDMETHOD. ENDMETHOD. ENDMETHOD. EN EN_DCLASS_DCLASS.. EN EN_DCLASS_DCLASS.. DA

DATTAA: r1 TYPE REF TO counter: r1 TYPE REF TO counter,, DA

DATTAA: r1 TYPE REF TO counter: r1 TYPE REF TO counter,,

h1 TYPE REF TO

h1 TYPE REF TO handler.handler.

h1 TYPE REF TO

h1 TYPE REF TO handler.handler.

S

STTAARTRT S

STTAART-RT--OF-OFOF-OF---SSSSEEEELLLLEEEECCCCTTTTIIIION.ON.ON.ON. C

CREREAATE OBJETE OBJECCT: r1T: r1,, h1.h1. C

CREREAATE OBJETE OBJECCT: r1T: r1,, h1.h1. SET

SET HANDLER HANDLER h1h1

SET

SET HANDLER HANDLER h1-h1-->handle->handle>handle>handle _ _ _{_}_{_}exexexexccccessessessess _FOR_FOR_FOR_FOR _ALL_ALL_ALL_ALL _INSTANCES._INSTANCES._INSTANCES._INSTANCES. D

DO 20 TO 20 TIIMEMESS.. D

DO 20 TO 20 TIIMEMESS.. CALL

CALL METHOMETHODD r1r1 CALL

CALL METHOMETHODD r1-r1-->increment->increment>increment>increment____counter.counter.counter.counter.

EN

EN_DD_DDO.O.

EN

(34)

(35)

Constructors

  

 Special methods called automatically by the system to set theSpecial methods called automatically by the system to set theSpecial methods called automatically by the system to set theSpecial methods called automatically by the system to set the

starting state of an object or class.

starting state of an object or class. 

 

 Called when a class is instantiated.Called when a class is instantiated.Called when a class is instantiated.Called when a class is instantiated.

Types of Constructors Types of Constructors Types of Constructors Types of Constructors Instance constructors Instance constructors Instance constructors Instance constructors   

 Declared using keyword METHODS CONSTRUCTORDeclared using keyword METHODS CONSTRUCTORDeclared using keyword METHODS CONSTRUCTORDeclared using keyword METHODS CONSTRUCTOR 

 

 Used to initialize instance attributes.Used to initialize instance attributes.Used to initialize instance attributes.Used to initialize instance attributes.

Static Constructors Static Constructors Static Constructors Static Constructors   

 Declared using CLASSDeclared using CLASSDeclared using CLASS-Declared using CLASS--METHODS CLASS CONSTRUCTOR.-METHODS CLASS CONSTRUCTOR.METHODS CLASS CONSTRUCTOR.METHODS CLASS CONSTRUCTOR. 

 

 Used to initialize static attributes.Used to initialize static attributes.Used to initialize static attributes.Used to initialize static attributes. 

 

 Constructor implementation is similar to a methodConstructor implementation is similar to a methodConstructor implementation is similar to a methodConstructor implementation is similar to a method

implementation.

(36)

Inheritance

  

 The statement isThe statement isThe statement isThe statement is CLASS

CLASS <<subclass> DEFINTION INHERITING FROMsubclass> DEFINTION INHERITING FROM CLASS

CLASS <<subclass> DEFINTION INHERITING FROMsubclass> DEFINTION INHERITING FROM

< <superclass>.superclass>. < <superclass>.superclass>.   

 A class can have more than one A class can have more than one A class can have more than one A class can have more than one subclass, but may havesubclass, but may havesubclass, but may havesubclass, but may have only one superclass(single inheritance).

only one superclass(single inheritance). only one superclass(single inheritance). only one superclass(single inheritance).

OBJECT OBJECT C1 C1 C2 C2

(37)

Inheritance contd«

  

 When subclasses inherit from superclass, which itself aWhen subclasses inherit from superclass, which itself aWhen subclasses inherit from superclass, which itself aWhen subclasses inherit from superclass, which itself a subclass of another class, all classes form inheritance subclass of another class, all classes form inheritance subclass of another class, all classes form inheritance subclass of another class, all classes form inheritance tree. tree. tree. tree. Redefining Methods Redefining Methods Redefining Methods Redefining Methods   

 Use the addition REDEFINITION in Use the addition REDEFINITION in Use the addition REDEFINITION in Use the addition REDEFINITION in METHODSMETHODSMETHODSMETHODS statement to redefin

statement to redefine e public or protected instancepublic or protected instance statement to redefin

statement to redefine e public or protected instancepublic or protected instance method in a subclass. method in a subclass. method in a subclass. method in a subclass.   

 The method retains the name and interface, but with aThe method retains the name and interface, but with aThe method retains the name and interface, but with aThe method retains the name and interface, but with a new implementation.

new implementation. new implementation. new implementation.

(38)

Interfaces

  

 Exclusively describes the external point of contact, butExclusively describes the external point of contact, butExclusively describes the external point of contact, butExclusively describes the external point of contact, but don¶t contain any implementation part.

don¶t contain any implementation part. don¶t contain any implementation part. don¶t contain any implementation part.

  

 Has only declaration part, in the public section of Has only declaration part, in the public section of Has only declaration part, in the public section of Has only declaration part, in the public section of classes. classes. classes. classes.   

 A class can implement any number of interfaces and A class can implement any number of interfaces and A class can implement any number of interfaces and A class can implement any number of interfaces and

interface can be implemented by any number of classes. interface can be implemented by any number of classes. interface can be implemented by any number of classes. interface can be implemented by any number of classes.

  

 Interface resolutiInterface resolutiInterface resolutiInterface resolution on on on operator(~operator(~operator(~operator(~) enables ) enables ) enables ) enables to accessto accessto accessto access interface compone

interface components using nts using an object referencean object reference interface compone

interface components using nts using an object referencean object reference belonging to the class implementing the interface. belonging to the class implementing the interface. belonging to the class implementing the interface. belonging to the class implementing the interface.

(39)

Defining Interfaces

  

 Use the statementUse the statementUse the statementUse the statement

INTERFACE

INTERFACE <<intf>intf> INTERFACE

INTERFACE <<intf>intf> ---ENDINTERFACE. ENDINTERFACE. ENDINTERFACE. ENDINTERFACE.   

 Can be defined either globally in R/3 repository or Can be defined either globally in R/3 repository or Can be defined either globally in R/3 repository or Can be defined either globally in R/3 repository or locally in ABAP program.

locally in ABAP program. locally in ABAP program. locally in ABAP program.

  

 You can define the same components in an interfaceYou can define the same components in an interfaceYou can define the same components in an interfaceYou can define the same components in an interface as in a class. as in a class. as in a class. as in a class.   

 ComponenComponenComponenComponents don¶t have ts don¶t have ts don¶t have ts don¶t have to be assigned individually toto be assigned individually toto be assigned individually toto be assigned individually to a visibility section. a visibility section. a visibility section. a visibility section.   

 Interfaces don¶t have an implementation part, since their Interfaces don¶t have an implementation part, since their Interfaces don¶t have an implementation part, since their Interfaces don¶t have an implementation part, since their methods are implemented in the class that implements it. methods are implemented in the class that implements it. methods are implemented in the class that implements it. methods are implemented in the class that implements it.

(40)

Implementing Interfaces

  

 Use in the declaration part of the Use in the declaration part of the Use in the declaration part of the Use in the declaration part of the class (public section),class (public section),class (public section),class (public section), INTERFACES

INTERFACES <<intf>.intf>. INTERFACES

INTERFACES <<intf>.intf>. 

 

 During implementation, components are added to other During implementation, components are added to other During implementation, components are added to other During implementation, components are added to other componen

components in ts in the public section.the public section. componen

components in ts in the public section.the public section.

  

 The class must implement the methods of all interfacesThe class must implement the methods of all interfacesThe class must implement the methods of all interfacesThe class must implement the methods of all interfaces implemented in it . implemented in it . implemented in it . implemented in it .   

 The implemThe implemThe implemThe implementation part entation part entation part entation part of the class must contain of the class must contain of the class must contain of the class must contain aaaa method implementation for each interface method method implementation for each interface method method implementation for each interface method method implementation for each interface method

<

<imeth>:imeth>:

<

<imeth>:imeth>:

METHOD

METHOD <<intf~imeth>intf~imeth> METHOD

METHOD <<intf~imeth>intf~imeth> ---ENDMETHOD. ENDMETHOD. ENDMETHOD. ENDMETHOD.

(41)

Advanta

ges of OOPS in

ABAP

Advanta

ges of OOPS in

ABAP



 The implementation of object-oriented elements inThe implementation of object-oriented elements in

ABAP language has considerably increased response ABAP language has considerably increased response

times. times.



 Use of OOPS in ABAP helps Use of OOPS in ABAP helps to have a better controlto have a better control of development complexity, a better means for

of development complexity, a better means for encapsulation and extensibility.

encapsulation and extensibility.



 Reusability of the objects will Reusability of the objects will reduce the coding effortreduce the coding effort and helps in utilizing the existing code for other

and helps in utilizing the existing code for other programs.

(42)

Object Orientatio

n T

ools in ABAP

Object Orientatio

n T

ools in ABAP

ABAP Class Builder ABAP Class Builder ABAP Class Builder ABAP Class Builder

  

 Transaction Code:Transaction Code:TTrraannssaaccttiioon n CCooddee:: SE24.SSSE24.EE2244.. 

 

 Allows you to create and maintain global classes Allows you to create and maintain global classes Allows you to create and maintain global classes Allows you to create and maintain global classes

and interfaces. and interfaces. and interfaces. and interfaces. Features Features Features Features   

 Display an overview of global data types and their Display an overview of global data types and their Display an overview of global data types and their Display an overview of global data types and their

relationships. relationships. relationships. relationships.   

 Create and specify attributes, methods and eventsCreate and specify attributes, methods and eventsCreate and specify attributes, methods and eventsCreate and specify attributes, methods and events

of global classes and interfaces. of global classes and interfaces. of global classes and interfaces. of global classes and interfaces.

  

 Create internal types in a class.Create internal types in a class.Create internal types in a class.Create internal types in a class. 

 

(43)

(44)

HOW TO USE ALV USING OOPS HOW TO USE ALV USING OOPS HOW TO USE ALV USING OOPS HOW TO USE ALV USING OOPS

(45)

OOPS in ABAP OOPS in ABAP O OOOPPSSiinnABABAAPP 45454455 Tcode: SE38 Tcode: SE38 C

(46)

G

(47)

Add a

(48)

G

(49)

Declare

(50)

OOPS in ABAP

O

Fill internal table with list data to

(51)

I

I_{n PBO of the flow logic, w}_{n PBO of the flow logic, w}_{rite a module and inside the module}_{rite a module and inside the module}

write the code write the code

(52)

I

I_{f ALV}_{f ALV} GG_{rid instance not exist.}_{rid instance not exist.}

C

(53)

(54)

C

(55)

C

(56)