b.santos/abap-cheat-sheets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Update

Browse Source
This commit is contained in:
danrega
2024-12-20 16:12:45 +01:00
parent 0b2e7aae9b
commit 270edb9962
56 changed files with 11082 additions and 2506 deletions
Download Patch File Download Diff File Expand all files Collapse all files

94
src/zcl_demo_abap_objects.clas.abap
View File

@@ -1,51 +1,18 @@
***********************************************************************
*
* ABAP cheat sheet: ABAP object orientation
*
* -------------------------- PURPOSE ----------------------------------
* - Example to demonstrate various syntax options and concepts related
* to ABAP object orientation.
* - Topics covered: Working with objects and components, method redefinition
* in inheritance, working with interfaces, upcast and downcast, concepts
* like factory methods, singleton and abstract classes, using events.
* - The CCIMP include (local types tab in ADT) includes multiple local
* classes to support the example.
* - Artifacts related to this example:
* - zdemo_abap_objects_interface: Separate global interface to demonstrate
* working with interfaces
* - zcl_demo_abap_objects_friend: Another global class used to demonstrate
* the concept of friendship
*
* ----------------------- GETTING STARTED -----------------------------
* - Open the class with the ABAP development tools for Eclipse (ADT).
* - Choose F9 to run the class.
* - Check the console output.
* - To understand the context and the ABAP syntax used, refer to the
* notes included in the class as comments or refer to the respective
* topic in the ABAP Keyword Documentation.
* - Due to the amount of console output, the examples contain numbers
* (e.g. 1) ..., 2) ..., 3) ...) for the individual example sections.
* Also, the variable name is displayed in most cases. So to find
* the relevant output in the console easier and faster, just search
* for the number/variable name in the console (CTRL+F in the console)
* or use the debugger.
*
* ----------------------------- NOTE -----------------------------------
* The code presented in this class is intended only to support the ABAP
* cheat sheets. It is not intended for direct use in a production system
* environment. The code examples in the ABAP cheat sheets are primarily
* intended to provide a better explanation and visualization of the
* syntax and semantics of ABAP statements, not to solve concrete
* programming tasks. For production application programs, you should
* always work out your own solution for each individual case. There is
* no guarantee for the correctness or completeness of the code.
* Furthermore, there is no legal responsibility or liability for any
* errors or their consequences that may occur when using the the example
* code.
*
***********************************************************************
"! <p class="shorttext synchronized">ABAP cheat sheet: ABAP object orientation</p>
"! Example to demonstrate concepts related to ABAP object orientation.<br>Choose F9 in ADT to run the class.
"! <p class="shorttext"><strong>ABAP object orientation</strong><br/>ABAP cheat sheet example class</p>
"!
"! <p>The example class demonstrates syntax and concepts related to ABAP object orientation.<br/>
"! Choose F9 in ADT to run the class.</p>
"!
"! <h2>Note</h2>
"! <ul><li>Topics covered include working with objects and components, method redefinition in inheritance,
"! using interfaces, upcasting and downcasting, and concepts like factory methods, singletons, abstract
"! classes, and events.</li>
"! <li>The CCIMP include (local types tab in ADT) contains multiple local classes to support the example.</li>
"! <li>Artifacts related to this example: {@link zdemo_abap_objects_interface} (a separate global interface to
"! demonstrate interface usage) and {@link zcl_demo_abap_objects_friend} (another global class used to
"! demonstrate the concept of friendship</li>
"! <li>Find information on <strong>getting started with the example class</strong> and the
"! <strong>disclaimer</strong> in the ABAP Doc comment of class {@link zcl_demo_abap_aux}.</li></ul>
CLASS zcl_demo_abap_objects DEFINITION
PUBLIC
FINAL
@@ -98,7 +65,7 @@ CLASS zcl_demo_abap_objects IMPLEMENTATION.
METHOD if_oo_adt_classrun~main.
out->write( |ABAP Cheat Sheet Example: ABAP Object Orientation\n\n| ).
out->write( |ABAP cheat sheet example: ABAP Object Orientation (1)\n\n| ).
out->write( |Working with objects and components\n\n| ).
out->write( |1) Declaring reference variables\n\n| ).
@@ -1108,4 +1075,33 @@ CLASS zcl_demo_abap_objects IMPLEMENTATION.
zdemo_abap_objects_interface~stat_str = `The result of calling zdemo_abap_objects_interface~halve is: `.
r_halve = i_op / 2.
ENDMETHOD.
METHOD zdemo_abap_objects_interface~addition.
... "No implementation included since the method is not used in this example class.
ENDMETHOD.
METHOD zdemo_abap_objects_interface~subtraction.
... "No implementation included since the method is not used in this example class.
ENDMETHOD.
METHOD zdemo_abap_objects_interface~meth_fail.
...
"No implementation included since the method is not used in this example class.
"Interface methods declared with DEFAULT IGNORE and DEFAULT FAIL are not required
"to be implemented, i.e. specifying
"METHOD zdemo_abap_objects_interface~meth_fail.
" ...
"ENDMETHOD.
"is not required. Ususally, all interface methods must be implemented.
"See the example class zcl_demo_abap_objects_misc that also implements the
"interface, but does not include the method implementations.
"If implementations are desired, you can manually add the implementations (if
"not automatically added using the ADT quickfix when adding the interface) for
"these methods.
ENDMETHOD.
METHOD zdemo_abap_objects_interface~meth_ignore.
... "See the comment in the method implementation of zdemo_abap_objects_interface~meth_fail.
ENDMETHOD.
ENDCLASS.