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PUBLIC
CREATE PUBLIC .
PUBLIC SECTION.
CLASS-METHODS new
RETURNING
VALUE(ro_instance) TYPE REF TO zcl_abapgit_ajson_utilities.
METHODS diff
IMPORTING
!iv_json_a TYPE string OPTIONAL
!iv_json_b TYPE string OPTIONAL
!io_json_a TYPE REF TO zif_abapgit_ajson OPTIONAL
!io_json_b TYPE REF TO zif_abapgit_ajson OPTIONAL
!iv_keep_empty_arrays TYPE abap_bool DEFAULT abap_false
EXPORTING
!eo_insert TYPE REF TO zif_abapgit_ajson
!eo_delete TYPE REF TO zif_abapgit_ajson
!eo_change TYPE REF TO zif_abapgit_ajson
RAISING
zcx_abapgit_ajson_error .
METHODS merge
IMPORTING
!iv_json_a TYPE string OPTIONAL
!iv_json_b TYPE string OPTIONAL
!io_json_a TYPE REF TO zif_abapgit_ajson OPTIONAL
!io_json_b TYPE REF TO zif_abapgit_ajson OPTIONAL
!iv_keep_empty_arrays TYPE abap_bool DEFAULT abap_false
RETURNING
VALUE(ro_json) TYPE REF TO zif_abapgit_ajson
RAISING
zcx_abapgit_ajson_error .
METHODS sort
IMPORTING
!iv_json TYPE string OPTIONAL
!io_json TYPE REF TO zif_abapgit_ajson OPTIONAL
RETURNING
VALUE(rv_sorted) TYPE string
RAISING
zcx_abapgit_ajson_error .
METHODS is_equal
IMPORTING
!iv_json_a TYPE string OPTIONAL
!iv_json_b TYPE string OPTIONAL
!ii_json_a TYPE REF TO zif_abapgit_ajson OPTIONAL
!ii_json_b TYPE REF TO zif_abapgit_ajson OPTIONAL
RETURNING
VALUE(rv_yes) TYPE abap_bool
RAISING
zcx_abapgit_ajson_error .
PROTECTED SECTION.
PRIVATE SECTION.
DATA mo_json_a TYPE REF TO zif_abapgit_ajson .
DATA mo_json_b TYPE REF TO zif_abapgit_ajson .
DATA mo_insert TYPE REF TO zif_abapgit_ajson .
DATA mo_delete TYPE REF TO zif_abapgit_ajson .
DATA mo_change TYPE REF TO zif_abapgit_ajson .
METHODS normalize_input
IMPORTING
!iv_json TYPE string OPTIONAL
!io_json TYPE REF TO zif_abapgit_ajson OPTIONAL
RETURNING
VALUE(ro_json) TYPE REF TO zif_abapgit_ajson
RAISING
zcx_abapgit_ajson_error .
METHODS diff_a_b
IMPORTING
!iv_path TYPE string
RAISING
zcx_abapgit_ajson_error .
METHODS diff_b_a
IMPORTING
!iv_path TYPE string
!iv_array TYPE abap_bool DEFAULT abap_false
RAISING
zcx_abapgit_ajson_error .
METHODS delete_empty_nodes
IMPORTING
!io_json TYPE REF TO zif_abapgit_ajson
!iv_keep_empty_arrays TYPE abap_bool
RAISING
zcx_abapgit_ajson_error .
ENDCLASS.
CLASS zcl_abapgit_ajson_utilities IMPLEMENTATION.
METHOD delete_empty_nodes.
DATA ls_json_tree LIKE LINE OF io_json->mt_json_tree.
DATA lv_done TYPE abap_bool.
DO.
lv_done = abap_true.
IF iv_keep_empty_arrays = abap_false.
LOOP AT io_json->mt_json_tree INTO ls_json_tree
WHERE type = zif_abapgit_ajson_types=>node_type-array AND children = 0.
io_json->delete( ls_json_tree-path && ls_json_tree-name ).
ENDLOOP.
IF sy-subrc = 0.
lv_done = abap_false.
ENDIF.
ENDIF.
LOOP AT io_json->mt_json_tree INTO ls_json_tree
WHERE type = zif_abapgit_ajson_types=>node_type-object AND children = 0.
io_json->delete( ls_json_tree-path && ls_json_tree-name ).
ENDLOOP.
IF sy-subrc = 0.
lv_done = abap_false.
ENDIF.
IF lv_done = abap_true.
EXIT. " nothing else to delete
ENDIF.
ENDDO.
ENDMETHOD.
METHOD diff.
mo_json_a = normalize_input(
iv_json = iv_json_a
io_json = io_json_a ).
mo_json_b = normalize_input(
iv_json = iv_json_b
io_json = io_json_b ).
mo_insert = zcl_abapgit_ajson=>create_empty( ).
mo_delete = zcl_abapgit_ajson=>create_empty( ).
mo_change = zcl_abapgit_ajson=>create_empty( ).
diff_a_b( '/' ).
diff_b_a( '/' ).
eo_insert ?= mo_insert.
eo_delete ?= mo_delete.
eo_change ?= mo_change.
delete_empty_nodes(
io_json = eo_insert
iv_keep_empty_arrays = iv_keep_empty_arrays ).
delete_empty_nodes(
io_json = eo_delete
iv_keep_empty_arrays = iv_keep_empty_arrays ).
delete_empty_nodes(
io_json = eo_change
iv_keep_empty_arrays = iv_keep_empty_arrays ).
ENDMETHOD.
METHOD diff_a_b.
DATA:
lv_path_a TYPE string,
lv_path_b TYPE string.
FIELD-SYMBOLS:
<node_a> LIKE LINE OF mo_json_a->mt_json_tree,
<node_b> LIKE LINE OF mo_json_a->mt_json_tree.
LOOP AT mo_json_a->mt_json_tree ASSIGNING <node_a> WHERE path = iv_path.
lv_path_a = <node_a>-path && <node_a>-name && '/'.
READ TABLE mo_json_b->mt_json_tree ASSIGNING <node_b>
WITH TABLE KEY path = <node_a>-path name = <node_a>-name.
IF sy-subrc = 0.
lv_path_b = <node_b>-path && <node_b>-name && '/'.
IF <node_a>-type = <node_b>-type.
CASE <node_a>-type.
WHEN zif_abapgit_ajson_types=>node_type-array.
mo_insert->touch_array( lv_path_a ).
mo_change->touch_array( lv_path_a ).
mo_delete->touch_array( lv_path_a ).
diff_a_b( lv_path_a ).
WHEN zif_abapgit_ajson_types=>node_type-object.
diff_a_b( lv_path_a ).
WHEN OTHERS.
IF <node_a>-value <> <node_b>-value.
" save as changed value
mo_change->set(
iv_path = lv_path_b
iv_val = <node_b>-value
iv_node_type = <node_b>-type ).
ENDIF.
ENDCASE.
ELSE.
" save changed type as delete + insert
CASE <node_a>-type.
WHEN zif_abapgit_ajson_types=>node_type-array.
mo_delete->touch_array( lv_path_a ).
diff_a_b( lv_path_a ).
WHEN zif_abapgit_ajson_types=>node_type-object.
diff_a_b( lv_path_a ).
WHEN OTHERS.
mo_delete->set(
iv_path = lv_path_a
iv_val = <node_a>-value
iv_node_type = <node_a>-type ).
ENDCASE.
CASE <node_b>-type.
WHEN zif_abapgit_ajson_types=>node_type-array.
mo_insert->touch_array( lv_path_b ).
diff_b_a( lv_path_b ).
WHEN zif_abapgit_ajson_types=>node_type-object.
diff_b_a( lv_path_b ).
WHEN OTHERS.
mo_insert->set(
iv_path = lv_path_b
iv_val = <node_b>-value
iv_node_type = <node_b>-type ).
ENDCASE.
ENDIF.
ELSE.
" save as delete
CASE <node_a>-type.
WHEN zif_abapgit_ajson_types=>node_type-array.
mo_delete->touch_array( lv_path_a ).
diff_a_b( lv_path_a ).
WHEN zif_abapgit_ajson_types=>node_type-object.
diff_a_b( lv_path_a ).
WHEN OTHERS.
mo_delete->set(
iv_path = lv_path_a
iv_val = <node_a>-value
iv_node_type = <node_a>-type ).
ENDCASE.
ENDIF.
ENDLOOP.
ENDMETHOD.
METHOD diff_b_a.
DATA lv_path TYPE string.
FIELD-SYMBOLS <node_b> LIKE LINE OF mo_json_b->mt_json_tree.
LOOP AT mo_json_b->mt_json_tree ASSIGNING <node_b> WHERE path = iv_path.
lv_path = <node_b>-path && <node_b>-name && '/'.
CASE <node_b>-type.
WHEN zif_abapgit_ajson_types=>node_type-array.
mo_insert->touch_array( lv_path ).
diff_b_a(
iv_path = lv_path
iv_array = abap_true ).
WHEN zif_abapgit_ajson_types=>node_type-object.
diff_b_a( lv_path ).
WHEN OTHERS.
IF iv_array = abap_false.
READ TABLE mo_json_a->mt_json_tree TRANSPORTING NO FIELDS
WITH TABLE KEY path = <node_b>-path name = <node_b>-name.
IF sy-subrc <> 0.
" save as insert
mo_insert->set(
iv_path = lv_path
iv_val = <node_b>-value
iv_node_type = <node_b>-type ).
ENDIF.
ELSE.
READ TABLE mo_insert->mt_json_tree TRANSPORTING NO FIELDS
WITH KEY path = <node_b>-path value = <node_b>-value.
IF sy-subrc <> 0.
" save as new array value
mo_insert->push(
iv_path = iv_path
iv_val = <node_b>-value ).
ENDIF.
ENDIF.
ENDCASE.
ENDLOOP.
ENDMETHOD.
METHOD is_equal.
DATA li_ins TYPE REF TO zif_abapgit_ajson.
DATA li_del TYPE REF TO zif_abapgit_ajson.
DATA li_mod TYPE REF TO zif_abapgit_ajson.
diff(
EXPORTING
iv_json_a = iv_json_a
iv_json_b = iv_json_b
io_json_a = ii_json_a
io_json_b = ii_json_b
IMPORTING
eo_insert = li_ins
eo_delete = li_del
eo_change = li_mod ).
rv_yes = boolc(
li_ins->is_empty( ) = abap_true AND
li_del->is_empty( ) = abap_true AND
li_mod->is_empty( ) = abap_true ).
ENDMETHOD.
METHOD merge.
mo_json_a = normalize_input(
iv_json = iv_json_a
io_json = io_json_a ).
mo_json_b = normalize_input(
iv_json = iv_json_b
io_json = io_json_b ).
" Start with first JSON...
mo_insert = mo_json_a.
" ...and add all nodes from second JSON
diff_b_a( '/' ).
ro_json ?= mo_insert.
delete_empty_nodes(
io_json = ro_json
iv_keep_empty_arrays = iv_keep_empty_arrays ).
ENDMETHOD.
METHOD new.
CREATE OBJECT ro_instance.
ENDMETHOD.
METHOD normalize_input.
IF boolc( iv_json IS INITIAL ) = boolc( io_json IS INITIAL ).
zcx_abapgit_ajson_error=>raise( 'Either supply JSON string or instance, but not both' ).
ENDIF.
IF iv_json IS NOT INITIAL.
ro_json = zcl_abapgit_ajson=>parse( iv_json ).
ELSEIF io_json IS NOT INITIAL.
ro_json = io_json.
ELSE.
zcx_abapgit_ajson_error=>raise( 'Supply either JSON string or instance' ).
ENDIF.
ENDMETHOD.
METHOD sort.
DATA lo_json TYPE REF TO zif_abapgit_ajson.
lo_json = normalize_input(
iv_json = iv_json
io_json = io_json ).
" Nodes are parsed into a sorted table, so no explicit sorting required
rv_sorted = lo_json->stringify( 2 ).
ENDMETHOD.
ENDCLASS.
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