To access a dynamic context node defined in a Used Component

Hi Gurus,
I need your help with something.
I have a dynamic context node in ComponentA. I want it in Component B too.
Component B uses Component A, but I am not able to get access to the context node.
Is it possible to do this? Any suggestions how to proceed.
PS: I am trying to do a dynamic mapping. The initial scenario was here, Set data into Model Node on Navigating from a View
Thanks in advance,
Anjana R.
Message was edited by:
Anjana Raghav

Hi Gurus,
Its working now. Earlier, the code was something like this....
IWDNodeInfo compNode = wdThis.wdGet<i>Comp</i>Interface().wdGetAPI().getContext().getRootNodeInfo().getChild(nodeNm);
viewNodeInfo.setMapping(compNode,true);
and was trying to map it using
iewNodeInfo.addMappedAttribute("order",".<i>Comp</i>."+ nodeNm + ".order");
Now, I am mapping like this.
viewNodeInfo.addMappedAttribute("order","order");
Thanks,
Anjana R.

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Error creating dynamic context node in Webdynpro for ABAP. Plesae help!

Hi
   I am getting the following error while creating a dynamic context node with 2 attributes. Please help me resolve this problem.
Note
The following error text was processed in the system PET : Line types of an internal table and a work area not compatible.
The error occurred on the application server FMSAP995_PET_02 and in the work process 0 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: IF_WD_CONTEXT_NODE~GET_STATIC_ATTRIBUTES_TABLE of program CL_WDR_CONTEXT_NODE_VAL=======CP
Method: GET_REF_TO_TABLE of program CL_SALV_WD_DATA_TABLE=========CP
Method: EXECUTE of program CL_SALV_WD_SERVICE_MANAGER====CP
Method: APPLY_SERVICES of program CL_SALV_BS_RESULT_DATA_TABLE==CP
Method: REFRESH of program CL_SALV_BS_RESULT_DATA_TABLE==CP
Method: IF_SALV_WD_COMP_TABLE_DATA~MAP_FROM_SOURCE_DATA of program CL_SALV_WD_C_TABLE_V_TABLE====CP
Method: IF_SALV_WD_COMP_TABLE_DATA~MAP_FROM_SOURCE of program CL_SALV_WD_C_TABLE_V_TABLE====CP
Method: IF_SALV_WD_COMP_TABLE_DATA~UPDATE of program CL_SALV_WD_C_TABLE_V_TABLE====CP
Method: IF_SALV_WD_VIEW~MODIFY of program CL_SALV_WD_C_TABLE_V_TABLE====CP
Method: IF_SALV_WD_COMPONENT~VIEW_MODIFY of program CL_SALV_WD_A_COMPONENT========CP
My code is like the following:
TYPES: BEGIN OF t_type,
            CARRID TYPE sflight-carrid,
            CONNID TYPE sflight-connid,
         END OF t_type.
Data: i_struc type table of t_type,
dyn_node   type ref to if_wd_context_node,
rootnode_info   type ref to if_wd_context_node_info,
i_node_att type wdr_context_attr_info_map,
wa_node_att type line of wdr_context_attr_info_map.
      wa_node_att-name = 'CARRID'.
      wa_node_att-TYPE_NAME = 'SFLIGHT-CARRID'.
      insert wa_node_att into table i_node_att.
      wa_node_att-name = 'CONNID'.
      wa_node_att-TYPE_NAME = 'SFLIGHT-CONNID'.
      insert wa_node_att into table i_node_att.
clear i_struc. refresh i_struc.
select carrid connid into corresponding fields of table i_struc from sflight where carrid = 'AA'.
rootnode_info = wd_context->get_node_info( ).
rootnode_info->add_new_child_node( name = 'DYNFLIGHT'
                                   attributes = i_node_att
                                   is_multiple = abap_true ).
dyn_node = wd_context->get_child_node( 'DYNFLIGHT' ).
dyn_node->bind_table( i_struc ).
l_ref_interfacecontroller->set_data( dyn_node ).
I am trying to create a new node. That is
CONTEXT
- DYNFLIGHT
CARRID
CONNID
As you see above I am trying to create 'DYNFLIGHT' along with the 2 attributes which are inside this node. The structure of the node that is, no.of attributes may vary based on some condition. Thats why I am trying to create a node dynamically.
Also I cannot define the structure in the ABAP dictionary because it changes based on condition

Ok, I think I found a bug... It seems for adobe forms in WD4A, the root context node must be 1-1 and you must nest the 1-n node within that... Not sure why, but it worked. So in my case my context would look like this:
FOO_NODE (1-1)
     Widget (1-N)
          -Widget_info (1-1)
               *Name
               *Sku
               *Description
          -Widget_plant (1-M)
               *Plant_Code
               *Plant_State
               *Plant_City
          -Widget_pic (1-1)
               *Picture

Adding dynamic context node

Hello,
I having problems with creating a dynamic context node.
How can i add a new node to the context on runtime and not on design time.
Best Regards,
Smadar.

Hi,
IWDNodeInfo nodeinfo=wdContext.getNodeInfo();
/* This will add a ValueNode */
IWDNodeInfo customerNode=nodeinfo.addChild("Customer",null,true,true,true,false,false,true,null,null,null);
/* This will add a Attribute to the above Node */
IWDAttributeInfo custAttr=customerNode.addAttribute("AttribName","com.sap.dictionary.string");
Regards, Anilkumar

Create dynamic context node

Hi Experts,
I have tried the given example for Dynamic Context Node in Webdynpro ABAP
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/4c70444a-0801-0010-7688-9e4bd844b783
But getting the Error when executing this application
Note
The following error text was processed in the system ISP : Adapter error in &VIEW_ELEMENT_TYPE& "TABLENAME" of view "ZWD_SACHIN_DYN_ALV.MAIN_VIEW": Context binding of property VALUE cannot be resolved: Node MAIN_VIEW.1.INPUT does not contain any elements
The error occurred on the application server usirs254_ISP_01 and in the work process 0 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: RAISE_FOR of program CX_WDR_ADAPTER_EXCEPTION======CP
Method: RAISE_BINDING_EXCEPTION of program CL_WDR_VIEW_ELEMENT_ADAPTER===CP
Method: GET_BOUND_ELEMENT of program CL_WDR_VIEW_ELEMENT_ADAPTER===CP
Please resolve this issue because when I am mapping the Attribute TableName in the InputGroup, it is throwing above Error.
Thanks in advance
Regards
Sachin

Hi Sachin,
I am unable to understand why you are getting an error. I have tried the same tutorial myself and it works fine for me. Make sure that the TABLENAME attribute (which is of string type) is properly binded to the value property of the input field.
Regards
Arjun
Edited by: Arjun Thakur on Mar 17, 2009 1:46 PM

ABAP: dynamic context node + attribute for DROP_DOWN_BY_KEY

Hello,
I need to create a Node with attributes dynamically and than assign it to a DROP_DOW_BY_KEY element in ABAP.
I create drop down this way:
drop_down_figure = cl_wd_dropdown_by_key=>new_dropdown_by_key( bind_selected_key = 'REPOSITORY.FIGURES' on_select = 'GET_OPERATOR' ).
cl_wd_grid_data=>new_grid_data( element = drop_down_figure ).
ui_container->add_child( drop_down_figure ).
However, here I bind to REPOSITORY.FIGURES. Instead of doing this I need to bind it to an attribute that I create.
I can access wd_context but I am not sure how to create a node in wd_context, then attribute for that node that will contain items for drop down.
bind_selected_key is type of String. If I create a node with attribute how do I cast it to a String so I can pass it to a constructor of a drop down?
Thank you.

Hi Georgy,
There is a 3 - series weblog for this.
The first one is:
/people/thomas.szcs/blog/2005/12/28/dynamic-programming-in-web-dynpro-abap--introduction-and-part-i-understanding-ui-elements
The following are the the general steps for creating a node and table where table name is input by the user:
DATA:
UI Elements
    group_1       TYPE REF TO cl_wd_uielement_container,
    new_tab       TYPE REF TO cl_wd_table,
Context Nodes
    dyn_node      TYPE REF TO if_wd_context_node,
    tabname_node TYPE REF TO if_wd_context_node,
Node Info
    rootnode_info TYPE REF TO if_wd_context_node_info,
Data Reference (for internal table)
    stru_tab      TYPE REF TO data,
String (for table name)
    tablename     TYPE string.
FIELD-SYMBOLS:
    <tab> TYPE table.
1) * get node info of context root node
rootnode_info = wd_context->get_node_info( ).
2) * create sub node named TEST1 of structure (tablename)
cl_wd_dynamic_tool=>create_nodeinfo_from_struct(
    parent_info = rootnode_info
    node_name = tablename
    structure_name = tablename
    is_multiple = abap_true ).
3) * get instance of new node
dyn_node = wd_context->get_child_node( name = tablename ).
4) ***** create new UI element table *******************************************************
new_tab = cl_wd_dynamic_tool=>create_table_from_node(
ui_parent = group_1
table_id = 'TESTTAB'
node      = dyn_node ).
5) ***** fill context node with data *******************************************************
create internal table of (tabletype)
CREATE DATA stru_tab TYPE TABLE OF (tablename).
ASSIGN stru_tab->* TO <tab>.
Get table content
SELECT * FROM (tablename) INTO CORRESPONDING FIELDS OF TABLE <tab>.
Bind internal table to context node.
dyn_node->bind_table( <tab> ).
Regards,
Srini.

How to implement Dynamic Context Node Mapping between Components

Hey genuis:
I am looking for how to implement context mapping bwteen two components. I read some threads, and try to use external context mapping. The example works fine. However, my requirement is more than that.
I have a context node in Component B, and the attributes in it are dynamically generated. Component A is the main component which use Component B's function. Both A and B work fine by theirselves.
When I assemble A and B (external mapping), the system gives me a exception:com.sap.tc.webdynpro.progmodel.context.ContextException: MappedNodeInfo(T8UploadCompInterface.data): cannot create nodes, no mapping defined yet.
Please give me some suggestion?
Any responses are appreciated.

I miss this thread.
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/6fdae690-0201-0010-a580-d104b459cb44
This is almost the right solution for my problem.

Using Search Help with ALV and Dynamic context node

The topic subject already describes my situation.
I have to create, populate and remove context nodes at runtime, and bind them to an ALV, to let user display the data or modify the data. The nodes I create are always typed with a table name, but the table name is of course, dynamic.
This is all working: what's not working is help for entries inside the ALV; since the table has foreign keys and domains with check tables or fixed values, I expected that search helps were detected and managed by the framework.
Instead, no help search is displayed except the input help based on data-type of the one "Date" input fields.
I think I have to work on the dynamic node creation, and not on the ALV itself, since the latter only takes the node/attributes information, but i could be wrong. I tried with both the two following codings:
CALL METHOD lo_nd_info_root->add_new_child_node
    EXPORTING
      static_element_type          = vs_tabname
      name                         = 'SAMPLE_NODE_NAME'
*    is_mandatory                 = abap_false
*    is_mandatory_selection       = abap_false
     is_multiple                  = abap_true
     is_multiple_selection        = abap_false
*    is_singleton                 = abap_false
      is_initialize_lead_selection = abap_false
      is_static                    = abap_false
    RECEIVING
      child_node_info              = lo_nd_info_data .
cl_wd_dynamic_tool=>create_nodeinfo_from_struct(
      parent_info = lo_nd_info_root
      node_name = 'SAMPLE_NODE_NAME'
      structure_name = vs_tabname
      is_multiple = abap_true ).
The result is the same...is there any way to let the ALV know what search helps it has to use, and doesn't force me to manually build a VALUE_SET to be bound on the single attributes? There are many tables, with many fields, and maintaining this solution would be very costly.

I have checked with method GET_ATTRIBUTE_VALUEHELP_TYPE of interface IF_WD_CONTEXT_NODE_INFO, on an attribute which i know to have a search help (Foreign key of a check table).
The method returns 'N', that is the constant IF_WD_VALUE_HELP_HANDLER~CO_VH_TYPE_NO_HELP. So, the framework was not able to find a suitable search help.
Using method GET_ATTRIBUTE_VALUE_HELP of the same interface, on the same attribute, returns me '111', which is constant C_VALUE_HELP_MODE-AUTOMATIC.
Therefore, the WD framework knows it has to automatically detect a value help, but fails to find one.
Also, this means in my opinion that the ALV and the dynamic external mapping are not the culprits: since node creation, no help is detected for any attribute but the date. Honestly, I don't have a clue on what's happening.

Dynamic Context Node Copying question

I am trying to dynamically copy some context nodes from my component controller to the view controller. In the source context, I have a node whose "Multiple" property is set to true.
I use the function addMappedChild to copy the attribute info, but the copied node always has "Multiple" set to false!! In the definition of addMappedChild there is no paramter for "Multiple". How do I do this?
Thanks
Walter
public IWDNodeInfo addMappedChild(java.lang.String name,
                                  java.lang.Class elementClass,
                                  boolean singleton,
                                  boolean mandatorySelection,
                                  boolean multipleSelection,
                                  java.lang.String mappedPath,
                                  boolean selectionMapped,
                                  boolean initializeLeadSelection)

Are you making like dscribed here
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/webas/webdynpro/dynamically creating, building, and mapping a context in web dynpro.pdf
page 14?
Best Regards, Maxim r.

Delete Dynamic context nodes?

I have created Context nodes dynamically,, I want to delete few nodes dynamically itself.
wdContext.getContext().reset(true) would delete entire dynamically created nodes..... but i want to delete particular nodes...
can any 1 help me regarding this....
thanku

Try
wdContext.removeElementAt(index)
or
wdContext.removeElement(IWDNodeElement)
Regards, Aldo.

Dynamic context nodes

Hi all,
I want to create a dynamic context in this way. But in this example I always need a data element in the dictionary for the describe by name method --> here ZREMARK
I can use here describe_by_name( 'STRING' ) but then the column headerline is empty.
How can I set the column headerline when I use this coding?
comp-name = 'REMARK'.
comp-type ?= cl_abap_datadescr=>describe_by_name( 'ZREMARK' ).
APPEND comp TO comp_tab.
not this structure contains the fields "CONNID" and "CARRID"
struct_type = cl_abap_structdescr=>create( comp_tab ).
now the nodeinfo is created
node_info = wd_context->get_node_info( ).
node_info = node_info->add_new_child_node(
    name                         = 'MY_NODE'
    is_mandatory                 = abap_false
    is_multiple                  = abap_true
    static_element_rtti          = struct_type
    is_static                    = abap_false
regards

>Is it possible to create the columns of the table control in a similar way?
Yes you can create the table and its columns dynamically in WDDOMODIFYVIEW. Here is a sample - I'm only creating one column, but it would be easy to adapt this logic to loop through some list of fields to create the columns.
DATA lr_container TYPE REF TO cl_wd_uielement_container.
DATA lr_input TYPE REF TO cl_wd_input_field.
DATA lr_table TYPE REF TO cl_wd_table.
DATA lr_caption TYPE REF TO cl_wd_caption.
DATA lr_table_column TYPE REF TO cl_wd_table_column.
DATA lr_table_standard_cell TYPE REF TO cl_wd_table_standard_cell.
IF first_time = abap_true.
    lr_container ?= view->get_element( 'ROOTUIELEMENTCONTAINER' ).
    cl_wd_table=>new_table(
      EXPORTING
        bind_data_source              = 'SFLIGHT.SFLIGHT'
        id                            = 'DYNTABLE'
      RECEIVING
         control                       = lr_table ).
    cl_wd_input_field=>new_input_field(
      EXPORTING
         bind_value             = 'SFLIGHT.SFLIGHT.CARRID'
         id                     = 'INPUT1'
      RECEIVING
        control                = lr_input ).
    lr_table_column = cl_wd_table_column=>new_table_column( ).
    lr_table_column->set_table_cell_editor( lr_input ).
    lr_caption = cl_wd_caption=>new_caption( ).
    lr_caption->set_text( 'Some text' ).
    lr_table_column->set_header( EXPORTING the_header = lr_caption ).
    lr_table->add_column( EXPORTING the_column = lr_table_column ).
*       create the layout data of the text view
    DATA lr_grid_data TYPE REF TO cl_wd_grid_data.
    lr_grid_data = cl_wd_grid_data=>new_grid_data( lr_table ).
    lr_table->set_layout_data( lr_grid_data ).
    lr_container->add_child(
      EXPORTING
        the_child = lr_table ).
ENDIF.

Dynamic Context node

Hi,
    I am new to Webdynpro abap.
   while creating Dynamic node with passing input value am getting error ' Adapter error in &VIEW_ELEMENT_TYPE& "INPUT1" of view "ZKI_WEB_DEMO21.MAIN": Context binding of property VALUE cannot be resolved: Node MAIN.1.INPUT1 does not contain any elements "
Here i'm passing plant as an input field . i create a node with attribute plant 'type = zplant' and method in component controller.
mapping context and calling method in main view.
without passing input am getting the output.
Regards
Kishore

Hi Kissnas,
                      once User Giving the table name and click the button it displaying the output.
but my requirement is user want to give table name and Input value then clicking the button. i binded the value
property to inputfield. when im test the WD Appl it showin error.(before the selection screen it showing error)
Regards
Kishore

Context binding between different components using component interface cont

Please tell me the procedure how to do context mapping between different components ......
Please post the procedure ASAP.

Hi Koti,
Check this
<a href="/people/bertram.ganz/blog/2007/01/19/new-web-dynpro-java-tutorial--component-interface-definitions-in-practice:///people/bertram.ganz/blog/2007/01/19/new-web-dynpro-java-tutorial--component-interface-definitions-in-practice
<a href="https://www.sdn.sap.com/irj/sdn/wiki?path=/display/wdjava/usecomponentsinbiggerWebDynproprojects%28componentization%29&">https://www.sdn.sap.com/irj/sdn/wiki?path=/display/wdjava/usecomponentsinbiggerWebDynproprojects%28componentization%29&</a>
regards
Sumit

Dynamic reverse context node mapping at runtime

Hi!
I have an application which uses another embedded component containing a ALV table which shows the data of a transparent table.
Everything works fine if i'm working with a static table with static attributes and map the context node of the application to the node in the embedded component. The context node in the embedded component is reversed mapped and gets its data from the application's context node.
Now i want to do it dynamically. Inside the application the user should choose the name of a table and I'm using RTTI functions to get it's technical informations. At runtime i'm adding dynamically attributes (i.e. fieldname, type, length) to a static context node called 'DATA'.
The ALV component of the embedded component is mapped to an interface context node named 'DATA' which uses reverse mapping to receive data from the applications context node 'DATA'.
What I need to know is how to create the mapping between application context node and interface context node of the embedded component at runtime after i have created the attributes of the node dynamically. Is that basically possible?
I've already tried to map the both nodes statically to see if the dynamically created attributes are mapped automatically then. The mapping seems to be fine at node level, but doesn't work for the later dynamically added attributes.
Could someone point me to informations if dynamic mapping context nodes is basically possible and how to do it?
Regards
Ralf-J.

Hi Lars!
Thanks for the link! The problem isn't to fill the context node dynamically. That's already working using RTTI etc.
It seems to me that the interface context node of the ALV in the embedded component doesn't recognize the dynamically added attributes. As i wrote the binding on node level (DATA->DATA), which i'm doing at design time, is working as expected, but the added attributes are only shown in the context node of the using component but not in the embedded.
I'm still thinking there must be a way to do a binding at runtime. On the other hand the comment of Glenn in the thread you've pointed me to, seems to suggest that the ALV itself might have problems with dynamically appended attributes.
Regards
Ralf-J.

Accessing context nodes from DO_VALIDATE_INPUT

Hello together,
in Web-UI i want to set the CITY depending on the POSTAL-Code. This should be done automatically if the user saves a new business partner. I did some coding in the EH_ONSAVE, but there are some problems with the duplicate check. So i tried it in the DO_VALIDATE_INPUT but i can't access the context node. Does anybody know how i can change some field before EH_ONSEARCH()?
Best regards
Sascha Federau

Sascha,
If the context node is available on the view you are working, you should be able to access the the context node as DO_VALIDATE_INPUT is available in the IMPL class.
Example:
current ?= me->typed_context->product->collection_wrapper->get_current( ).
Also you use DO_HANDLE_DATA, I remeber using it sometime back as it triggers on Save.
Regards,
Masood Imrani S.

How to populate the context nodes based on an event

Hi All,
I am having a basic problem. I have created a new Webdynpro Abap application. Here, in the main view, i have define a text view as well as a table. I have created context nodes A and B in component controller. The attributes under A are A1 and the attributes of B are B1,B2, and B3. I have also created an action button C in the same view. These have been mapped to the context nodes in the main view. A1 is mapped to the text view and B1, B2 and B3 are mapped to the table.
My requirement is as follows. When user Clicks on execute, i want to use the value A1 from the text view in a function module and return the values to B1, B2 and B3. B1, B2 and B3 are multiple values mind you.
I have successfully executed the function module within the WDONACTIONC method. How to i accomplish this Basic Task. Please Help
Best Regards
Mazin

Hi Mazin,
Step 3 is as follows...
Say you have a context node, you have to bind this node with table UI element, now this node must contain some context attribute which you have to bind with your columns of table. now say name of context node is cn_table. now what you have to do is get data from FM in the internal table..........
now move data by using move corresponding or by looping depending on requirement to an internal table which has fields with the same name as that of name of your attributes... this is imp to display the data...... now you can bind this internal table with context node using code below.......
data lo_nd_cn_table type ref to if_wd_context_node.
data lo_el_cn_table type ref to if_wd_context_element.
data ls_cn_table type wd_this->element_cn_table.
data it_table type wd_this->elements_cn_table.
data wa_table type wd_this->element_cn_table.
data it type standard table of t005t.
data wa type t005t.
**   navigate from <CONTEXT> to <CN_TABLE> via lead selection
select * from t005t into TABLE it.
loop at it into wa.
    wa_table-ca_one = wa-land1.
    wa_table-ca_two = wa-landx.
    wa_table-ca_three = wa-natio.
    wa_table-ca_enable = abap_true.
   append wa_table to it_table.
    endloop.
lo_nd_cn_table = wd_context->get_child_node( name =
wd_this->wdctx_cn_table ).
*   get element via lead selection
    lo_el_cn_table = lo_nd_cn_table->get_element( ).
lo_nd_cn_table->bind_table( it_table ).
ca-one, ca_two, ca_three and ca_enable are name of my context attribute......
regards
Pranav
Edited by: Pranav Nagpal on Dec 22, 2008 10:08 AM

To access a dynamic context node defined in a Used Component

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