Component usage name in the sub component

[florian_halder]

Hi,

I have a component A which use a component B.

Is it possible to get the component usage name in the component B?

I found it in the component B by debugging, but I found no method to get it.

The problem is that I can't pass it manually through component B, because I need the name in the wddoinit of component B.

I can export the name to memory before i add the component usage and import it in the wddoinit of B, but I would not prefer.

Any ideas?

Thanks

Florian

[Former Member]

Hi,

Whenever you declare any component usage in your comp controller, a constant is created ( but hidden to you ) in using component.

You can access component usage reference by constant:

wd_this->wd_cpuse_<Your Comp Usage Name Declared By You>

ex

wd_this->wd_cpuse_MY_ALV ( here MY_ALV is my comp usage name )

and component usage interface can be accessed by

wd_this->wd_cpifc_<Your Comp Usage Name Declared By You>

wd_this->wd_cpifc_MY_ALV.

Or if you want to fetch you component usage name programmaticaly ( like MY_ALV in my example above )

then check this code snippet

DATA: lo_cmp_usage TYPE ref to if_wd_component_usage.

DATA: lv_cmp_name type string.

lo_cmp_usage = wd_this->wd_cpuse_MY_ALV( ).

lv_cmp_name = lo_cmp_usage->NAME.

Hope this helps.

Regards

Manas Dua

[florian_halder]

Hi,

the problem is that i do not declare the component usage on design time.

I add it dynamically on the wddoinit of component A, so I can't use both options..

I do it like this:

• create component usage group

l_cmp_api = wd_this->wd_get_api( ).

if l_cmp_api->has_cmp_usage_group( 'TEST_GROUP' ) is initial.

wd_this->cmp_usage_group = l_cmp_api->create_cmp_usage_group(

name = 'TEST_GROUP'

used_component = 'ZWD_DYNAMIC_CI' ).

endif.

• add component usages to group

data: lo_cmp_usage TYPE REF TO IF_WD_COMPONENT_USAGE.

lo_cmp_usage = wd_this->cmp_usage_group->add_component_usage(

name = 'USAGE1'

embedding_position = 'MAIN_VIEW/VC1'

used_component = 'ZWD_SEARCH_REPORT1' ).

I tried the following to get the component usage and call a method to set the name. But I get an error that ZWD_DYNAMIC_CI is

a component interface and so it cant create a instance. This component interface has only a interface fiew. I need this interface to make the component exchangeable. I'm new on web dynpro so I don't know if I do this correct.

DATA lo_ic TYPE REF TO object .

data: lo_ic2 TYPE REF ZIWCI_WD_SEARCH_REPORT1.

lo_ic = lo_cmp_usage->GET_INTERFACE_CONTROLLER( ).

lo_ic2 ?= lo_ic.

lo_ic2->set_usage_name( 'USAGE1' ).

I even can't execute the following code instead of the code above:

IF lo_cmp_usage->has_active_component( ) is INITIAL.

lo_cmp_usage->create_component( ).

ENDIF.

I get the same error!!

Regards Florian

Edited by: Florian Halder on May 21, 2010 12:36 PM

[florian_halder]

Hi,

I think I solved my problem. I use the same assistance class for both components with an attribute gv_usage_name.

After I add the component usage I have to create the component with the following code.

WD_ASSIST->gv_usage_name = 'USAGE1'.

IF lo_cmp_usage->has_active_component( ) is INITIAL.

lo_cmp_usage->create_component( component_name = 'ZWD_SEARCH_REPORT1'

assistance_class = wd_assist ).

ENDIF.

On the wddoinit of the other component i read the attribute

lv_usage_name1 = wd_assist->gv_usage_name.

Unfortunatelly I can't pass the value directly through the other component by a method, because therefor I have to create the component first. But I need the value in the wddoinit method.

Regards Florian