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danrega
2024-03-07 12:57:14 +01:00
parent 508e74a1e0
commit 5a5f0727fa
7 changed files with 1967 additions and 1912 deletions
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06_Dynamic_Programming.md
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@@ -370,7 +370,6 @@ ASSIGN s-xl1 TO <simple>.
"ASSIGN s-tab_ha TO <simple>.
ASSIGN s-oref TO <object>.
s-oref = NEW zcl_demo_abap_objects( ).
```
<p align="right"><a href="#top">⬆️ back to top</a></p>
@@ -1028,9 +1027,12 @@ st = VALUE #( col1 = 1 col2 = `aaa` col3 = `Z` ).
APPEND st TO it.
DATA(dref) = NEW st_type( col1 = 2 col2 = `b` col3 = `Y` ).
"You can achieve the access using ASSIGN statements as shown above, or
"by statically specifying the structure and the (object) component selector
"followed by a character-like data object in parentheses.
"You can achieve the access using ASSIGN statements as shown above
"(using field symbols), ...
ASSIGN st-('COL1') TO FIELD-SYMBOL(<col1>).
"... or by statically specifying the structure and the (object) component
"selector followed by a character-like data object in parentheses.
"Write position
st-('COL1') = 123.
it[ 1 ]-('COL1') = 456.
@@ -1038,15 +1040,24 @@ dref->('COL1') = 789.
"Read position
"The example shows how you can retrieve the textual content of any component
"of any structure.
DATA(content_col2) = CONV string( st-('COL1') ).
DATA(content_col3) = |{ st-('COL3') }|.
DATA content_col1 LIKE st-col1.
"of any structure. As a prerequisite, the components must be convertible
"to type string in the example.
DATA content_col1 TYPE string.
content_col1 = st-('COL1').
DATA(content_col2) = CONV string( st-('COL2') ).
DATA(content_col3) = |{ st-('COL3') }|.
"The following example creates an anonymous data object. The dereferenced
"data reference variable is assigned the component value. Using the LIKE
"addition, the appropriate type is specified (and not the string type as
"above for the structure component col1 that is of type i).
DATA dref_comp TYPE REF TO data.
CREATE DATA dref_comp LIKE st-('COL3').
dref_comp->* = st-('COL3').
CREATE DATA dref_comp LIKE st-('COL1').
dref_comp->* = st-('COL1').
"As shown further down, using RTTI to get the absolute type name of the
"dereferenced data reference variable.
DATA(type_used) = cl_abap_typedescr=>describe_by_data(
dref_comp->* )->absolute_name. "\TYPE=I
"If the component is not found, a catchable exception is raised.
TRY.
@@ -1766,7 +1777,7 @@ tdo_by_name_elem_helper = cl_abap_typedescr=>describe_by_name( 'ELEMTYPE' ).
"... using the cl_abap_typedescr=>describe_by_data method.
"In this case, the data objects are provided.
"The examples cover an elementary data object, a structure and and
"The examples cover an elementary data object, a structure and an
"internal table.
DATA elemdobj TYPE elemtype.
DATA strucdobj TYPE structype.