Getting the type in content assist extension

Question

Hello,
In a plugin which extends the JDT, I need to add proposals to the content assist.
To do that, I would like to know the type of the prefix expression.
For example, when the user enters the code below, Eclipse gives in the content assist the methods of the Random class :
Random random = new Random();
random.
So the proposal computer finds the type of the "random" variable.
How does it work ?
Regards,
Romain.

Answer 1

Hello Joy,
Actually you don't need to do this, you can use the method GET_RELATIVE_NAME( ) to do the job for you!
DATA: gr_struct       TYPE REF TO cl_abap_structdescr,
      gt_components   TYPE cl_abap_structdescr=>component_table,
      gs_component    TYPE cl_abap_structdescr=>component,
      gv_actual_name  TYPE string.
* Get the interface structure fields
gr_struct ?= cl_abap_typedescr=>describe_by_name( 'ZIF_TEST=>STR01' ).
gt_components = gr_struct->get_components( ).
LOOP AT gt_components INTO gs_component.
* Get actual name
  gv_actual_name = gs_component-type->get_relative_name( ).
  WRITE: / gv_actual_name.
ENDLOOP.
If you want more DDIC details for the fields, you can try this way:
DATA: gr_element TYPE REF TO cl_abap_elemdescr.
LOOP AT gt_components INTO gs_component.
  gr_element ?= gs_component-type. "Narrow Casting
  gs_fieldinfo = gr_element->get_ddic_field( ). "Get the DDIC info
  WRITE: / gs_fieldinfo-rollname.
ENDLOOP.
BR,
Suhas
Edited by: Suhas Saha on Jan 31, 2012 2:57 PM