Even Based XML Parsing in ABAP

[Former Member]

Hi all ,

Currently i am using DOM Based Parsing to parse XML in my ABAP program. i am planning to change the code by using Event based parsing which is recommended for perfomance when we parse large xml document

Any one have the Example program for event based parsing the xml .pls help me in this.

Thanks in Advance

Ram

[Former Member]

Hello,

you can look at the coding example

data: event type ref to if_ixml_event,

event_sub type i

lp_dom type ref to if_ixml_document,

pstreamfac TYPE REF TO if_ixml_stream_factory,

pistream TYPE REF TO if_ixml_istream,

.

• create the factory for streams

pstreamfac = g_ixml->create_stream_factory( ).

• create the input stream:

pistream = pstreamfac->create_istream_cstring( string = xml ).

lp_dom = g_ixml->create_document( ).

• create the iXML parser:

parser = g_ixml->create_parser(

stream_factory = pstreamfac

istream = pistream

document = lp_dom ).

• let the parser know which events I am interested in

event_sub = if_ixml_event=>co_event_element_pre2 +

if_ixml_event=>co_event_element_post.

parser->set_event_subscription( events = event_sub ).

do.

event = parser->parse_event( ).

if event is initial.

exit. ' either end reached or error (check below)

endif.

data: str type string.

case event->get_type( ).

when if_ixml_event~co_event_element_pre2.

str = event->get_name( ). write: '<' str '>'.

when if_ixml_event~co_event_text_post.

str = event->get_value( ). write: str.

...

endcase.

enddo.

• always check for errors:

if parser->num_errors( ) ne 0.

...

endif.

Regards,

Marc

[ttrapp]

Hi!

When you are using iXML in an event-based way I suggest to disable implicit generation of the whole DOM-Tree:

CALL METHOD l_rif_pparser->set_dom_generating

EXPORTING

is_generating = space

RECEIVING

rval = l_var_rval.

Hope that helps!

Tobias