案例二十二WebdynproComponentInterface以及動態(tài)Interface的ComponentUsage個，為interface；)OO的說法，也就是說，動態(tài)地確定該interface的實現(xiàn)類。Webdynpro的組織架構(gòu)InterfaceImplemented的WDComponent創(chuàng)建一個 WebdynproInterface的實現(xiàn) WebdynproInterface的實現(xiàn) WebdynproInterface的應(yīng)用 Component“應(yīng)用”與“實現(xiàn)1”的交互：從“應(yīng)用”傳遞值給“實現(xiàn)Button1的事件 ponet“Nae）**asurethatusageof P_D1hasbeenDATA:lr_cmp_usageTYPEREF lr_cmp_usage=wd_this->wd_cpuse_if_usage(IFlr_cmp_usage- ponent()IS P1'method P1disabledisablethewd_this->enable_buttons(iv_enable=abap_falsecalltheInterfaceMethod,atthesametimeinthismethodTrrigertheInterfaceEvent(Insidesubcomponent)wd_this->call_if_method(firetheOutboundwd_this->navigate_to_if_view(methodENABLE_BUTTONSDATA:lr_node_ui_element_propsmethodENABLE_BUTTONSDATA:lr_node_ui_element_propsTYPEREFTO lr_elem_ui_element_propsTYPEREFTOnavigatefrom<CONTEXT>to<UI_ELEMENT_PROPS>vialeadlr_node_ui_element_props=wd_context->get_child_node(name=WD_THIS->wdctx_ui_element_props).getelementvialeadlr_elem_ui_element_props=lr_node_ui_element_props->get_element(setsinglelr_elem_ui_element_props- name= value=iv_enable).CALL_IF_METHOD:通過ComponentUsage(這里就是前面已動態(tài)指定的 P1')來調(diào)用它的InterfaceMethod(是' P1'實現(xiàn)的interface的method)methodmethodCALL_IF_METHODDATA:lr_node_method_paramsTYPEREFTO lr_elem_method_paramsTYPEREFTO*navigatefrom<CONTEXT>to<USER_INPUT>vialeadlr_node_method_params=wd_context->get_child_node(name=WD_THIS->wdctx_method_params). getgetelementvialeadlr_elem_method_params=lr_node_method_params->get_element(getsinglelr_elem_method_params- name= value=lv_string***calltheinterfaceDATA:lr_if_controllerTYPEREFTOlr_if_controller=wd_this->wd_cpifc_if_usage(CALLMETHODLR_IF_CONTROLLER- IV_STRING= EV_STRING=lv_string***writelr_elem_method_params- name= value=lv_string P1'methodmethodNAVIGATE_TO_IF_VIEWDATA:lr_node_plug_paramsTYPEREFTO lr_elem_plug_paramsTYPEREFTO wd_this->element_plug_paramsnavigatefrom<CONTEXT>to<PLUG_PARAMS>vialeadlr_node_plug_params=wd_context->get_child_node(name=wd_this->wdctx_plug_params).getelementvialeadlr_elem_plug_params=lr_node_plug_params->get_element(getsingleponent lr_elem_plug_params- name= value ponent*navigatetointerface p_plg(v_string ponent其中Out window中navigationInbound methodmethodHANDLEIF_PLUG_IN_1DATA:lr_node_plug_paramsTYPEREFTO lr_elem_plug_paramsTYPEREFTOnavigatefrom<CONTEXT>to<PLUG_PARAMS>vialeadlr_node_plug_params=wd_context->get_child_node(name=_plug_paramsgetelementvialeadlr_elem_plug_params=lr_node_plug_params->get_element(setsinglelr_elem_plug_params- name= value=v_string IV_STRINGImporting EV_STRING methodIF_METHODev_string=TRANSLATEev_stringTOUPPERwd_this->fire_if_event_evt(v_string='Translatedtouppercase.'這里的interfacemethod與 “應(yīng)用”與“實現(xiàn)1”的交互：從“實現(xiàn)1”傳遞值給“應(yīng)用”Context(mapInterfacemethodONACTIONGO_BACKmethodONACTIONGO_BACK OutboundDATA:lr_node_plug_paramsTYPEREFTO lr_elem_plug_paramsTYPEREFTO if_if_view=>element_plug_params ls_plug_params-navigatefrom<CONTEXT>to<PLUG_PARAMS>vialeadlr_node_plug_params=wd_context->get_child_node(name=_plug_paramsgetelementvialeadlr_elem_plug_params=lr_node_plug_params->get_element(getsinglelr_elem_plug_params- name= value=lv_import_varleaveIF_VIEWviawindowwd_this->fire_if_plug_out_1_plg(v_string=lv_import_varmethod PwindowinboundPlugMainViewoutbound，然后再調(diào)interfaceviewoutboundplugSubcomponentWDEVENTImportingCL_WD_CUSTOM_EVENTV_STRINGImporting PDATA:lr_cmp_usageTYPEREF DATA: TYPEREFWDEVENTImportingCL_WD_CUSTOM_EVENTV_STRINGImporting PDATA:lr_cmp_usageTYPEREF DATA: TYPEREFTO TYPEREFTOdeletesubcomponentlr_cmp_usage=wd_this->wd_cpuse_if_usage(IFlr_cmp_usage- ponent()ISNOT lr_cmp_usage- ponent(enablewd_this->enable_buttons(iv_enable=abap_truePassIFviewplugparametertonavigatefrom<CONTEXT>to<PLUG_PARAMS>vialeadlr_node_plug_params=wd_context->get_child_node(name=plug_paramsplug_paramsgetelementvialeadlr_elem_plug_params=lr_node_plug_params->get_element(setsinglelr_elem_plug_params- name= value=v_string“應(yīng)用”與“實現(xiàn)2”的交互：從“應(yīng)用”傳遞值給“實現(xiàn)method P2asurethatusagemethod P2asurethatusageof P_D1hasbeenDATA:lr_cmp_usageTYPEREF lr_cmp_usage=wd_this->wd_cpuse_if_usage(IFlr_cmp_usage- ponent()ISdisablethewd_this->enable_buttons(iv_enable=abap_falsecalltheInterfaceMethod,atthesametimeinthismethodTrrigertheInterfaceEvent(Insidesubcomponent)wd_this->call_if_method(firetheOutboundwd_this->navigate_to_if_view( P2'WDEVENTImportingWDEVENTImportingCL_WD_CUSTOM_EVENTV_STRINGImporting methodHANDLEIF_PLUG_IN_1DATA:lr_node_plug_paramsTYPEREFTO lr_elem_plug_paramsTYPEREFTOnavigatefrom<CONTEXT>to<PLUG_PARAMS>vialeadlr_node_plug_params=wd_context->get_child_node(name=_plug_paramsgetelementvialeadlr_elem_plug_params=lr_node_plug_params->get_element(setsinglelr_elem_plug_params- name= value=v_stringIV_STRINGImporting EV_STRING methodIF_METHODwd_this->fire_if_event_evt(v_string='Shiftedby2placescircular.'ev_string=SHIFTev_stringBY2PLACES“應(yīng)用”與“實現(xiàn)2”的交互：從“實現(xiàn)2”傳遞值給“應(yīng)用”methodONACTIONGO_BACKmethodONACTIONGO_BACK wd_this- Mainviewoutboundinboundplugmainviewoutboundpluglink起來，然后再實現(xiàn)真正的SubComponent的outboundmethod PDATA:lr_node_plug_paramsTYPEREFTO lr_elem_plug_paramsTYPEREFTO if_if_view=>element_plug_params ls_plug_params-navigatefrom<CONTEXT>to<PLUG_PARAMS