{"id":7647,"date":"2025-08-27T13:21:16","date_gmt":"2025-08-27T07:51:16","guid":{"rendered":"https:\/\/www.sapewmhelp.com\/?question=how-to-achieve-multiple-inheritance-using-interface-in-sap"},"modified":"2025-08-27T13:21:16","modified_gmt":"2025-08-27T07:51:16","slug":"how-to-achieve-multiple-inheritance-using-interface-in-sap","status":"publish","type":"question","link":"https:\/\/www.sapewmhelp.com\/?question=how-to-achieve-multiple-inheritance-using-interface-in-sap","title":{"rendered":"How to achieve multiple inheritance using interface in SAP ?"},"content":{"rendered":"

A class can implement multiple interfaces<\/strong> at once, which allows you to combine functionality from many sources.<\/p>\n

Example:\u00a0<\/strong><\/p>\n

” First interface
\nINTERFACE if_flyable.
\nMETHODS: fly.
\nENDINTERFACE.<\/p>\n

” Second interface
\nINTERFACE if_swimmable.
\nMETHODS: swim.
\nENDINTERFACE.<\/p>\n

” A class implementing multiple interfaces
\nCLASS cl_duck DEFINITION.
\nPUBLIC SECTION.
\nINTERFACES: if_flyable,
\nif_swimmable.
\nMETHODS: display.
\nENDCLASS.<\/p>\n

CLASS cl_duck IMPLEMENTATION.
\nMETHOD if_flyable~fly.
\nWRITE: \/ ‘The duck is flying.’.
\nENDMETHOD.<\/p>\n

METHOD if_swimmable~swim.
\nWRITE: \/ ‘The duck is swimming.’.
\nENDMETHOD.<\/p>\n

METHOD display.
\nWRITE: \/ ‘I am a duck with multiple abilities!’.
\nENDMETHOD.
\nENDCLASS.<\/p>\n

START-OF-SELECTION.
\nDATA(duck) = NEW cl_duck( ).<\/p>\n

duck->display( ).
\nduck->if_flyable~fly( ).
\nduck->if_swimmable~swim( ).<\/p>\n

Output:<\/p>\n

I am a duck with multiple abilities!
\nThe duck is flying.
\nThe duck is swimming.<\/p>\n

Key Points:<\/h5>\n
    \n
  • \n

    CLASS \u2026 DEFINITION<\/code> uses INTERFACES:<\/code> to include multiple interfaces.<\/p>\n<\/li>\n

  • \n

    Methods from interfaces must be implemented in the class.<\/p>\n<\/li>\n

  • \n

    When calling interface methods, you can:<\/p>\n

      \n
    • \n

      Use fully qualified names<\/strong>: object->if_interface~method( )<\/code><\/p>\n<\/li>\n

    • \n

      Or, if redefined explicitly as public methods, call them directly.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

    • \n

      This is the standard way to achieve “multiple inheritance” in ABAP.<\/p>\n<\/li>\n<\/ul>\n

       <\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","question-category":[158],"question_tags":[178,263,378,377,177],"class_list":["post-7647","question","type-question","status-publish","hentry","question-category-abap","question_tags-abap","question_tags-interface","question_tags-multiple-inheritance","question_tags-oop","question_tags-sap"],"_links":{"self":[{"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=\/wp\/v2\/question\/7647","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=\/wp\/v2\/question"}],"about":[{"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=\/wp\/v2\/types\/question"}],"author":[{"embeddable":true,"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7647"}],"wp:attachment":[{"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7647"}],"wp:term":[{"taxonomy":"question-category","embeddable":true,"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fquestion-category&post=7647"},{"taxonomy":"question_tags","embeddable":true,"href":"https:\/\/www.sapewmhelp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fquestion_tags&post=7647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}