ABAP webDynpro MS Office component usage throws - Access via 'NULL' object

Question

I am trying to include MS office word in my custom ABAP webDynro application based on the sample SAP Package SIOS for all the MS office component usage. <br>
In WDMODIFY method  , when the courser is reaching the point to call office component  it throws a Null pointer exception. Not sure , if i am missing some thing here or skip a step. Please advice. <br>
get the IOS interface <br>
  wd_this->factory ?= office->_method_handler. <br>
Below is the code for WDMODIFY <br>
method WDDOMODIFYVIEW . <br>
DATA: <br>
    office TYPE REF TO cl_wd_view_element, <br>
    office_res TYPE REF TO cl_wd_view_element,<br>
    mime_repository TYPE REF TO if_mr_api,<br>
    content TYPE xstring, <br>
    url TYPE string VALUE <br>
'/SAP/BC/WebDynpro/SAP/PUblic/BC/ssr/uuielibs/office_integration' & <br>
'/iostest_fields.doc'. <br>
  DATA refexp TYPE REF TO cx_ios_exception.
  DATA: msgid TYPE syst-msgid,
     msgnr TYPE syst-msgno,
     msgty TYPE syst-msgty.
  get message manager
  DATA: l_current_controller TYPE REF TO if_wd_controller,
        l_message_manager    TYPE REF TO if_wd_message_manager.
  DATA envproxy TYPE REF TO if_ios_environment.
just do it once
  CHECK first_time = abap_true.
  mime_repository = cl_mime_repository_api=>get_api( ).
  CALL METHOD mime_repository->get
    EXPORTING
      i_url     = url
    IMPORTING
      e_content = content.
  wd_context->set_attribute( name = 'DATAS' value = content ).
get the office control
  office ?= view->get_element( 'GENERIC_OFFICE' ).
  ASSERT ID sios_demo CONDITION  office IS BOUND.
not possible : Missing bugfix component bc-wd-aba
office_res ?= view->get_element( 'RESULT_DOCUMENT' ).
ASSERT ID sios_demo CONDITION  office IS BOUND.
get the IOS interface
  wd_this->factory ?= office->_method_handler.
  ASSERT ID sios_demo CONDITION wd_this->factory IS BOUND.
wd_this->factory_res ?= office_res->_method_handler.
ASSERT ID sios_demo CONDITION wd_this->factory_res IS BOUND.
  TRY.
      wd_this->factory->get_wordprocessing_proxy(
         IMPORTING proxy = wd_this->document  ).
      ASSERT ID sios_demo CONDITION wd_this->document IS BOUND.
     wd_this->factory_res->get_wordprocessing_proxy(
        IMPORTING proxy = wd_this->document_res  ).
     ASSERT ID sios_demo CONDITION wd_this->document IS BOUND.
*calling    setfields
      DATA co_error_info_getfields TYPE REF TO if_wd_context_element.
      DATA co_error_info_getfields_stru TYPE wdr_ext_attribute_pointer.
      co_error_info_getfields = wd_context->get_lead_selection( ).
      co_error_info_getfields_stru-attribute_name =
'error_info_getfields'.
      co_error_info_getfields_stru-element = co_error_info_getfields.
      DATA fields TYPE if_ios_wordprocessing=>fields_type.
      DATA fieldstable TYPE if_ios_wordprocessing=>fields_type_table.
      DATA co_fieldcontent TYPE REF TO if_wd_context_element.
      DATA co_fieldcontent_stru TYPE wdr_ext_attribute_pointer.
      DATA inputfield1 TYPE xstring.
      DATA tabulator TYPE xstring.
      DATA endofline TYPE xstring.
      DATA: conv TYPE REF TO cl_abap_conv_out_ce.
      DATA: testfielddata TYPE string.
      testfielddata = 'SAPTEST'.
      conv = cl_abap_conv_out_ce=>create( encoding = '4110'
ignore_cerr = abap_true ).
      CALL METHOD conv->convert( EXPORTING data = 'field1'
                                       IMPORTING buffer =
fields-fieldidentifier  ).
      CALL METHOD conv->convert( EXPORTING data = testfielddata
                                       IMPORTING buffer = fields-value
      CALL METHOD conv->convert( EXPORTING data =
cl_abap_char_utilities=>horizontal_tab
                                       IMPORTING buffer = tabulator  ).
      CALL METHOD conv->convert( EXPORTING data =
cl_abap_char_utilities=>cr_lf
                                       IMPORTING buffer = endofline  ).
      wd_context->set_attribute( name = 'inputfield1'
                                 value = testfielddata ).
      APPEND fields TO fieldstable.
      wd_context->set_attribute( name = 'fieldcontent' value =
fieldstable ).
      co_fieldcontent = wd_context->get_lead_selection( ).
      co_fieldcontent_stru-attribute_name = 'fieldcontent'.
      co_fieldcontent_stru-element = co_fieldcontent.
document is set through datasource!
      wd_this->document->setfields( EXPORTING fieldsptr =
co_fieldcontent_stru
                                              tabulator = tabulator
                                              endofline = endofline
                                              errorinformation =
co_error_info_getfields_stru ).
*calling    opening result document
      DATA co_error_getcontent TYPE REF TO if_wd_context_element.
      DATA co_error_getcontent_stru TYPE wdr_ext_attribute_pointer.
      co_error_getcontent = wd_context->get_lead_selection( ).
      co_error_getcontent_stru-attribute_name = 'error_getcontent'.
      co_error_getcontent_stru-element = co_error_getcontent.
      DATA co_createdcontent TYPE REF TO if_wd_context_element.
      DATA co_createdcontent_stru TYPE wdr_ext_attribute_pointer.
      co_createdcontent = wd_context->get_lead_selection( ).
      co_createdcontent_stru-attribute_name = 'createdcontent'.
      co_createdcontent_stru-element = co_createdcontent.
waiting of ACF Patch!
     wd_this->document->getcontent( errorinformation =
*co_error_getcontent_stru
     contentpointer_result =  co_createdcontent_stru ).
*calling    reopening template
      DATA error_opendocument TYPE REF TO if_wd_context_element.
      DATA error_opendocument_stru TYPE wdr_ext_attribute_pointer.
      error_opendocument = wd_context->get_lead_selection( ).
      error_opendocument_stru-attribute_name = 'error_opendocument'.
      error_opendocument_stru-element = error_opendocument.
     wd_this->document_res->if_ios_document~opendocument( EXPORTING errorinformation = error_opendocument_stru ).
    CATCH cx_ios_document INTO refexp.
    CATCH cx_ios_communicationwrapper INTO refexp.
    CATCH cx_ios_factory INTO refexp.
    CATCH cx_ios_environment INTO refexp.
    CATCH cx_ios_exception INTO refexp.
  ENDTRY.
  IF refexp IS NOT INITIAL.
    refexp->get_message( IMPORTING
              mtype = msgty
              number = msgnr
              mid = msgid ).
    l_current_controller ?= wd_this->wd_get_api( ).
    CALL METHOD l_current_controller->get_message_manager
      RECEIVING
        message_manager = l_message_manager.
  report message
    CALL METHOD l_message_manager->report_t100_message
      EXPORTING
        msgid = msgid
        msgno = msgnr
        msgty = msgty.
  ENDIF.
endmethod.
Edited by: suryajoshi on Jan 13, 2011 5:04 PM

Answer 1

Thanks for your reply.
I have defined DATAS attribute  as XSTRING.  You are right i am using SIOS code from WDMODIFY.
I am getting exception at this line:  Please advice. Its seems that factory is not been recognize. I double check , factory is present in attributes Tabs of the View.
get the IOS interface
  wd_this->factory ?= office->_method_handler.
  ASSERT ID sios_demo CONDITION wd_this->factory IS BOUND.