class ara::diag::DiagnosticSovdArrayContentElementDataIterator

The class ara::diag::DiagnosticSovdArrayContentElementDataIterator serves for stepwise iteration over SOVD array elements in diagnostic content ([SWS_DM_02215], AUTOSAR_AP_SWS_Diagnostics §8.60.4 “Class: DiagnosticSovdArrayContentElementDataIterator”). It provides operators for comparison, advancement via prefix increment, and dereferencing to yield references or pointers to DiagnosticSovdContentElementData ([SWS_DM_02216], [SWS_DM_02220]). All functions are thread-safe and specified as noexcept; therefore, the validity of the target range must be ensured by the application prior to dereferencing.

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Context

The class ara::diag::DiagnosticSovdArrayContentElementDataIterator provides a dedicated iterator for array elements within SOVD-based diagnostic communication (Service-Oriented Vehicle Diagnostics) ([SWS_DM_02215], AUTOSAR_AP_SWS_Diagnostics §8.60.4 “Class: DiagnosticSovdArrayContentElementDataIterator”). Its primary responsibility lies in providing standardized iteration interfaces to navigate sequentially over elements of a data array. Calling diagnostic applications as well as the referenced target elements of type DiagnosticSovdContentElementData act as interaction partners ([SWS_DM_02216], [SWS_DM_02217]). The iterator is declared in header ara/diag/diagnostic_sovd_content_element_data.h (AUTOSAR_AP_SWS_Diagnostics §8.60.4.1 “Public Member Functions”).

Lifecycle

The specification defines no separate public constructors for ara::diag::DiagnosticSovdArrayContentElementDataIterator; instances are consequently created and provided by the corresponding SOVD container structures via their iterator methods (interpretation). Question Q-e1fbf51ab4acc197 (open) The iterator itself does not own the underlying payload data, but merely holds references to the respective elements in memory. The validity of an iterator instance is therefore likely strictly coupled to the lifetime and validity of the parent data structure (interpretation). Question Q-c01219664b4adc56 (open)

Regarding lifecycle and concurrency, all member functions are specified as exception-safe (exception safe) and thread-safe (thread-safe) ([SWS_DM_02216], [SWS_DM_02218], [SWS_DM_02219], [SWS_DM_02220]). This permits concurrent read and advance operations across multiple threads, provided that the underlying data structure is not destructively modified concurrently.

Usage Path

The regular flow follows the typical pattern of C++ forward iterators. Applications compare the current iterator position with an end iterator via operator!= ([SWS_DM_02219]) or operator== ([SWS_DM_02218], AUTOSAR_AP_SWS_Diagnostics §8.60.4.1.1.5 “operator==”). If the end has not yet been reached, read access to the current element is performed either via dereferencing operator* ([SWS_DM_02216]) to return a reference to DiagnosticSovdContentElementData, or via the arrow operator operator-> ([SWS_DM_02217], AUTOSAR_AP_SWS_Diagnostics §8.60.4.1.1.4 “operator->”) to return a corresponding pointer. The application then advances the position to the next array element using the prefix increment operator operator++ ([SWS_DM_02220], AUTOSAR_AP_SWS_Diagnostics §8.60.4.1.1.3 “operator++”).

Sequence diagram: Call sequence during an iteration loop over SOVD array elements. Sources: [SWS_DM_02216], [SWS_DM_02219], [SWS_DM_02220].

Error Scenarios

All methods of the iterator are provided with the specification noexcept and by definition throw no exceptions ([SWS_DM_02216], [SWS_DM_02217], [SWS_DM_02218], [SWS_DM_02219], [SWS_DM_02220]). Error codes such as ara::core::ErrorCode are not provided for these interfaces. Correctness is the responsibility of the application's invocation conditions: Dereferencing via operator* or operator-> strictly requires as a precondition that the iterator points to a valid array element and not to the end position; accessing invalid iterators is likely to lead to undefined behavior (interpretation). Question Q-63d87e38f9886f6b (open)