ABAP_to_the_Future

Using BOPF to Write a DYNPRO-Style Program 8.2
EXPORTING iv_node = zif_monster_c=>sc_node-monster_header
it_key = ct_key
IMPORTING et_data = lt_monster_header ).
READ TABLE lt_monster_header INTO ls_monster_header INDEX 1.
CHECK sy-subrc EQ 0.
lo_monster_model = zcl_monster_model=>get_instance( ls_monster_
header-monster_number ).
lf_determination_needed =
lo_monster_model->is_derivation_relevant( lt_changes ).
ENDIF. "Are there any changes?
CHECK lf_determination_needed = abap_false.
DELETE ct_key WHERE key = ls_monster_header-key.
ENDMETHOD. "Check Delta
METHOD is_derivation_relevant.
* Local Variables
DATA: ls_changes LIKE LINE OF it_changes,
ls_changed_field TYPE string.
LOOP AT it_changes INTO ls_changes.
LOOP AT ls_changes-attributes INTO ls_changed_field.
CHECK ls_changed_field = 'SANITY' OR
ls_changed_field = 'HAT_SIZE'.
rf_relevant = abap_true.
RETURN.
ENDLOOP.
ENDLOOP.
ENDMETHOD. "Is Derivation Relevant
Listing 8.9 Checking Changed Fields
The CHECK Method
The CHECK method takes a look at the curren t values and decides if running a
determination needs to be done or not based on those values. This is another
optional method, because sometimes whether a determination runs or not is not
based on any particular field values.
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