05 Controllers and Context Programming

7/24/2019 05 Controllers and Context Programming

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Controller and Context Programming


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Standard Controller Hook Methods

Controller

Implementation

Standard

Hoo

!ethods

Instance

!ethods

Conte"t

Root Node

#e$%ired

Controllers

Controller

Inter&ace

'ther ()Controllers

C%stom

Controller

*%siness

+ogic

,!odels-

Created by explicit declaration or coding Created by the Web Dynpro rame!ork "WD#

Component

sage'ther ()

Components


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Standard Hook Methods %or allcontrollers

&ll controllers ha'e these t!o standard hook methods(

)he method !ill only be called d*ring the controller+s li%ecycle i% theycontain coding(

method ())'II.

endmethod.method ())'1I.

endmethod.


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Controller -nstance Methods

Controller

Implementation

Standard

Hoo

!ethods

Instance

!ethods

Conte"t

Root Node

#e$%ired

Controllers

Controller

Inter&ace

'ther ()

Controllers

C%stom

Controller

*%siness+ogic

,!odels-

Created by explicit declaration or coding Created by the Web Dynpro rame!ork "WD#

Component

sage

'ther ()

Components


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Controller &ttrib*tes and /tility methods

&ttrib*tes %or the controller can be created "p*blic or pri'ate#

Ar3itrary methods can 3e created 4 55.


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Standard Controller &ttrib*tesWDCN)34) and WD)H-S

()6C'1 and ()6HIS

present in any WD controller "except inter%ace and inter%ace 'ie!controller#(

WD)H-S 5 sel% re%erence o% the local inter%ace6 type depends on thecontroller type(

WDCN)34) 5 re%erence to the context o% associated controller(


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Standard Controller &ttrib*teWDCMPCN)R883R

()6C'!P6C'#'++1#

present in any WD controller(

re%erence to the component controller !ith access to all p*blic methodsand attrib*tes(

&ttrib*te !ill a*tomatically assigned to all 'ie! controllers !hen a 'ie!is created(

or all other controller the WDCMPCN)R883R attrib*te!illbe assigned6 !hen the properties o% the controller the componentcontroller is *sed(



Standard Hook Methods : ComponentController

otenly a component controller has these hook methods(

())'*18'#1A9IGAI'-t is exec*ted be%ore the na'igation stack is processed

())'P'SP#'C1SSIG

Data %rom m*ltiple components can be 'alidated be%ore the next step isexec*te


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&ccess to &ttrib*te o% Node 3lement -

8lights ..nC&RR-DCNN-D2C&RR-D

CNN-D:C&RR-D

CNN-D

Context Root


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&ccess to &ttrib*te o% Node 3lement --

8lights..nC&RR-D

CNN-D2C&RR-D

CNN-D:C&RR-D

CNN-D

Context Root


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&ccess to &ttrib*te o% Node 3lement ---

8lights

..nC&RR-D

CNN-D2C&RR-D

CNN-D :C&RR-D

CNN-D

Context Root



&ccess to all Static &ttrib*tes o% aNode 3lement

8lights..nC&RR-D

CNN-D2C&RR-D

CNN-D:C&RR-D

CNN-D

Context Root


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&ccess to all 3lements o% a Node

8lights..nC&RR-D

CNN-D2C&RR-D

CNN-D:C&RR-D

CNN-D

Context Root



=inding o% an 3lement to a Node ---

8+IGHS

Context Root



8+IGHSContext Root

data: Node_Flights type ref to If_Wd_Context_Node0 First_flight_lem type ref to If_Wd_Context_lement.

* navigate from


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Static &ttrib*tes and =inding o% a3lement to a Node

data: Node_Flights type ref to If_Wd_Context_Node0 &tr4_flights type If_Component'ontroller("lement_flights.

* navigate from .* 5ind ne) element to node Node_flights"5ind_str4't4re+ ne)_item ( &tr4_flights

&T_INITI1#_#7NT& ( a5ap_false -.


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8+IGHSContext Root

. append &tr4_flights to lt_flights.

* get node referen'e Node_Flights ( )d_'ontext"get_'hild_node+ F#I$%T& -.

* 5ind lo'al ta5le Node Flights"5ind ta5le+ lt flights -.

C&RR-D

CNN-D

:

Ita3

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05 Controllers and Context Programming