abap2xlsx Documentation

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Exception Classes and Error Handling ​

Guide to handling errors and exceptions in abap2xlsx applications.

Exception Hierarchy ​

abap2xlsx uses a structured exception hierarchy for different types of errors:

abap
" Base exception class
TRY.
    " Excel operations
  CATCH zcx_excel INTO DATA(lx_excel).
    " Handle all Excel-related exceptions
    MESSAGE lx_excel->get_text( ) TYPE 'E'.
ENDTRY.

Common Exception Types ​

File I/O Exceptions ​

abap
" Handle file reading/writing errors
TRY.
    DATA(lo_reader) = NEW zcl_excel_reader_2007( ).
    DATA(lo_excel) = lo_reader->load_file( lv_file_data ).
    
  CATCH zcx_excel_reader INTO DATA(lx_reader).
    " File format or corruption issues
    MESSAGE |File reading error: { lx_reader->get_text( ) }| TYPE 'E'.
    
  CATCH zcx_excel INTO DATA(lx_general).
    " General Excel exceptions
    MESSAGE |Excel error: { lx_general->get_text( ) }| TYPE 'E'.
ENDTRY.

Cell Reference Exceptions ​

abap
" Handle invalid cell references
TRY.
    lo_worksheet->set_cell( 
      ip_column = 'INVALID' 
      ip_row = 0 
      ip_value = 'Test' 
    ).
    
  CATCH zcx_excel_found INTO DATA(lx_found).
    " Invalid cell reference
    MESSAGE |Invalid cell reference: { lx_found->get_text( ) }| TYPE 'E'.
ENDTRY.

Error Prevention Strategies ​

Input Validation ​

abap
" Validate inputs before processing
METHOD validate_cell_reference.
  " Check column validity
  IF ip_column IS INITIAL OR strlen( ip_column ) > 3.
    RAISE EXCEPTION TYPE zcx_excel
      EXPORTING
        error = 'Invalid column reference'.
  ENDIF.
  
  " Check row validity
  IF ip_row <= 0 OR ip_row > 1048576.
    RAISE EXCEPTION TYPE zcx_excel
      EXPORTING
        error = 'Invalid row number'.
  ENDIF.
ENDMETHOD.

Resource Management ​

abap
" Proper resource cleanup
METHOD generate_excel_with_cleanup.
  DATA: lo_excel TYPE REF TO zcl_excel,
        lo_writer TYPE REF TO zif_excel_writer.
  
  TRY.
      CREATE OBJECT lo_excel.
      CREATE OBJECT lo_writer TYPE zcl_excel_writer_2007.
      
      " Excel operations
      DATA(lv_result) = lo_writer->write_file( lo_excel ).
      
    CLEANUP.
      " Cleanup resources even if exception occurs
      CLEAR: lo_excel, lo_writer.
      
  ENDTRY.
ENDMETHOD.

Best Practices ​

  1. Always Use TRY-CATCH: Wrap Excel operations in exception handling
  2. Specific Exception Types: Catch specific exceptions before general ones
  3. Resource Cleanup: Use CLEANUP sections for proper resource management
  4. User-Friendly Messages: Provide meaningful error messages to users
  5. Logging: Log exceptions for debugging and monitoring