Dependency Injection Container for ABAP
Dependency Injection Container for ABAP
This project targets to create dependency injection in ABAP with using a dependency injection container.
If you're interested in contributing to this project, just create a pull request or create an issue.
If you find a bug, please create an issue.
The following report shows how to use the container. One creates a variable which references an interface or a class. Then create a container and register classes which you depend on, including the aforementioned variable. After registering all necessary classes, call get_instance of the container to create the objects, including the dependencies. Note that it doesn't matter whether you use upper case.
REPORT z_di_test_report.
DATA service TYPE REF TO zif_di_test_service_1.
DATA(container) = zcl_di_container=>create_default( ).
container->register( 'ZCL_DI_TEST_SERVICE_1' ).
container->register( 'zcl_di_test_dependency_1_a' )->as_instance( ).
container->register( 'zcl_di_test_dependency_2' ).
container->get_instance(
CHANGING
c_target = service
).
This interface is used for the main class.
interface ZIF_DI_TEST_SERVICE_1
public .
endinterface.
The following two interfaces are used for dependencies:
interface ZIF_DI_TEST_DEPENDENCY_1
public .
endinterface.
interface ZIF_DI_TEST_DEPENDENCY_2
public .
endinterface.
This class is the main class which has two dependencies. Those dependencies are non optional parameters of type type ref to class or type ref to interface.
CLASS zcl_di_test_service_1 DEFINITION
PUBLIC
FINAL
CREATE PUBLIC .
PUBLIC SECTION.
interfaces zif_di_test_service_1.
methods constructor
IMPORTING
i_dependency_1 TYPE REF TO zif_di_test_dependency_1
i_dependency_2 TYPE REF TO zif_di_test_dependency_2.
PROTECTED SECTION.
PRIVATE SECTION.
data _dependency_1 TYPE REF TO zif_di_test_dependency_1.
data _dependency_2 TYPE REF TO zif_di_test_dependency_2.
ENDCLASS.
CLASS zcl_di_test_service_1 IMPLEMENTATION.
METHOD constructor.
me->_dependency_1 = i_dependency_1.
me->_dependency_2 = i_dependency_2.
ENDMETHOD.
ENDCLASS.
The following two classes are used as the concrete variants of the dependencies:
CLASS zcl_di_test_dependency_1_a DEFINITION
PUBLIC
FINAL
CREATE PUBLIC .
PUBLIC SECTION.
interfaces zif_di_test_dependency_1.
PROTECTED SECTION.
PRIVATE SECTION.
ENDCLASS.
CLASS zcl_di_test_dependency_1_a IMPLEMENTATION.
ENDCLASS.
CLASS zcl_di_test_dependency_2 DEFINITION
PUBLIC
FINAL
CREATE PUBLIC .
PUBLIC SECTION.
INTERFACES zif_di_test_dependency_2.
PROTECTED SECTION.
PRIVATE SECTION.
ENDCLASS.
CLASS zcl_di_test_dependency_2 IMPLEMENTATION.
ENDCLASS.