SAP - ABAP Dynpro

Class   

• Accessibility of different sections of a class
• Subclass cannot access the private component of superclass
• External users cannot access protected/private components of a class
• Local Class can understand data and types in the global area of the program
• Class can be instantiated within implementation of another class
• Deferred Definition of a Class
• Place to put non-declarative statements
• Use of Field Symbols in Class
• Use of Static Attributes
• Creation of Global class and using it in a local program

Methods   

• Method with one import parameter/ only one non-optional parameter
• Import parameters passed by ref. can't be changed inside the method
• Use of PREFERRED PARAMETER in a method
• Use of EXPORT and CHANGING parameters of a method
• Method using Internal Table as one of the parameters
• Use of RETURNING parameters in method
• Demo on Static Method
• Static methods can only use static attributes, instance methods use both
• Method Raising Exceptions
• Method can call itself
• Use of ME in methods
• Pointer Tables
• Dynamic Method Calls
• Use of parameter table
• Use of Exception Table

Constructors   

• Instance Constructors get fired at the time of class instantiation
• Instance Constructors can have import parameters
• Constructors cannot have any export parameters
• Instance Constructors can raise exceptions
• Use of static constructor
• Static constructor can be triggered at the beginning of a processing block(form /event/block/procedure)
• Static/Class constructors cannot have any interface

Inheritance   

• Subclass can access public/protected components of superclass
• Subclass can re-implement inherited methods from superclass
• Objects cannot be created from an abstract class
• Abstract methods cannot be implemented in abstract class
• Final classes cannot have any subclass
• Final methods cannot be redefined in the subclasses
• Static attributes exist only once per inheritance tree
• Constructors of superclass flows down the chain
• Subclass can have enhanced constructor than its superclass
• Static constructor of a class is called only once per program
• Static type and Dynamic type of a variable
• Static type should be more general than dynamic type of a reference variable
• Method of a parent class, used from its subclass, uses attributes of the parent class only, if the method is not re-defined in subclass.
• Demo on Widening Cast
• Singleton Class

Interface   

• Simple use of an interface
• Interfaces can only be implemented in the public section of a class
• A class with an interface should implement all the methods of that interface
• Values for interface attributes are assigned at the time of inclusion in a class
• Use of FINAL methods from Interface
• Use of Abstract methods from Interface
• Use of Interface Reference Variable
• Use of Nested Interface
• Using ALIASES
• Polymorphism via Interfaces

Friendship   

• Friendship between Classes
• Subclasses of friends can also become friends.
• Friendship is one sided

Events   

• Events with Handler Method in the same class
• Event with event handler method in different class
• More than one event handler method can exist for same event
• Use of static event
• Events with export parameters

Class-Based Exceptions   

• Using SAP provided exception class
• When both superclass and subclass are used to track error
• Propagation of Class-Based exceptions in procedures to the caller
• Program can raise exceptions based on SAP standard exception - classes
• Objects are created from exception classes when error is trapped
• Demo on Locally Defined Exception-Class
• Nested TRY...ENDTRY block
• Use of CLEANUP section

Web DynPro ABAP   
Overview   

• Introduction to Web Dynpro ABAP
• Architecture
• MVC model

Controllers   

• Different Controllers Types
• Controllers Lifetime
• Web Dynpro Navigation
• Context at Design Time
• Controller and Context Mapping
• BAPI usage using Service Call
• Cardinality
• Lead Selection
• Supply Function

UI Elements   

• Handling error message
• Pop up
• Calling an Web URL
• Image UI element
• Radio Button
• Check Box
• Drop Down By Key
• Drop Down By Index
• Code Wizard - Reading the node as table operation
• Table UI Element
• Table Popin
• Road Map UI element
• File Upload UI element

ALV   

• ALV Table
• Editable ALV
• ALV table Events Handling
• Select Options
  • OVS Search help
• Freely programmed search help

Miscellaneous   

• OTR Texts
  • Dynamic modifications at Runtime
  • Designing User Interfaces, Internationalizaton concept
  • Adobe form integration

Miscellaneous   

• Enhancement in Webdynrpo ABAP
• Enhancing a View
• Enhancing a controller
• Enhancing a component and window