is bound ?

[Former Member]

Hi

As a newbie to ABAP, I would like to know the meaning of the phrase 'is bound'

as in: 'IF htmlb_event IS BOUND AND htmlb_event->name = 'button'. '

Can you also refer me to a tutorial on OO ABAP?

Thank you

yuval

[Former Member]

OO ABAP

http://www.sapgenie.com/abap/OO/

For understanding COntrol Frameworks in OO ABAP, check this.

http://www.sapgenie.com/abap/controls/index.htm

ABAP_OBJECTS_ENJOY_0 Template for Solutions of ABAP Object Enjoy Course

ABAP_OBJECTS_ENJOY_1 Model Solution 1: ABAP Objects Enjoy Course

ABAP_OBJECTS_ENJOY_2 Model Solution 2: ABAP Objects Enjoy Course

ABAP_OBJECTS_ENJOY_3 Model Solution 3: ABAP Objects Enjoy Course

ABAP_OBJECTS_ENJOY_4 Model Solution 4: ABAP Objects Enjoy Course

ABAP_OBJECTS_ENJOY_5 Model Solution 5: ABAP Objects Enjoy Course

DEMO_ABAP_OBJECTS Complete Demonstration for ABAP Objects

DEMO_ABAP_OBJECTS_CONTROLS GUI Controls on Screen

DEMO_ABAP_OBJECTS_EVENTS Demonstration of Events in ABAP Objects

DEMO_ABAP_OBJECTS_GENERAL ABAP Objects Demonstration

DEMO_ABAP_OBJECTS_INTERFACES Demonstration of Interfaces in ABAP Objects

DEMO_ABAP_OBJECTS_METHODS Demonstration of Methods in ABAP Objects

DEMO_ABAP_OBJECTS_SPLIT_SCREEN Splitter Control on Screen

You can get nice docs regarding OO ABAP from these links also...

http://www.esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf

[uwe_schieferstein]

Hello Yuval

With this statement you check whether a reference variable holds indeed an instance of a class. For example, when have a dynpro with a container where you display an ALV grid you should instantiate the controls (container and ALV grid) only once.

DATA:
  go_container    TYPE REF TO cl_gui_custom_container,
  go_grid            TYPE REF TO cl_gui_alv_grid.

MODULE init_controls OUTPUT.

  IF ( go_container IS NOT BOUND ).
    CREATE OBJECT go_containe
       ...

    IF ( go_container IS BOUND ).
      CREATE OBJECT go_grid
        EXPORTING
          parent = go_container
          ...
    ENDIF.

  ELSE.  " ( go_container IS BOUND ).

  ENDIF.

ENDMODULE.

Regards

Uwe

[Former Member]

Hi guys

1. Thank you for the sources of information

2. As for 'bound' I understand the system just checks if the object is not null

(java idiom).

Thank you

yuval