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ABAP_IXML - Sequential Parsing To parse XML data sequentially, a dedicated parser is called repeatedly as follows: DATA(event) = parser->parse_event( ). Here, parser is a reference variable that points to the parser. The method PARSE_EVENT returns a reference variable with the type IF_IXML_EVENT that points to an object that represents an event that occurred during parsing. The parser processes the input stream istream in sequences defined by the events for which the caller registered itself previously. The possible events are stored as constants co_event... in the interface IF_IXML_EVENT. They are registered using the method parser->set_event_subscription( events = if_ixml_event=>co_event... + if_ixml_event=>co_event... + ... ). The parser stops after every event registered in this way and returns the properties of the current sequence using the object referenced by event. The method PARSE_EVENT must be called again to process the next sequence. If all XML data has been parsed or if an error occurs, the return value of PARSE_EVENT is initial. By default, DOM-based XML documents are constructed bit by bit in the memory during sequential processing. Once processing is complete, they are available in the same ways as after the method PARSE. Troubleshooting is also similar. During sequential parsing, the document represents a valid XML document with the elements parsed up until now. If sequential parsing is ended before all elements of the input stream have been processed, the XML document represents the part of the input stream parsed so far. The method SET_DOM_GENERATING of the parser can be used to deactivate the generation of the DOM representation off.
Latest notes:
A parsing event is an iterator concept and not an event raised by EVENTS in ABAP Objects.
If the caller does not register any events before PARSE_EVENT is called, PARSE_EVENT works like PARSE.
The sequential parsing described here is not a variant of SAX (Simple API for XML). Callback methods are not called when an event occurs. ABAP_HINT_END
