Reading XML files into ABAP

Question

Hello folks,
I've been struggling and I need to figure out how to read a field from an XML field into ABAP. I'm writing this method and I need to call this field from my XML file. Can you guys please give me suggestions? Please advise. I will appreciate your time. Thanks in advance.
Ol.

Answer 1

*& Report z_xit_xml_check
report z_xit_xml_check.
class cl_ixml definition load.
type-pools: ixml.
types: begin of t_xml_line,
data(256) type x,
end of t_xml_line,
begin of tsfixml,
data(1024) type c,
end of tsfixml.
data: l_ixml type ref to if_ixml,
l_streamfactory type ref to if_ixml_stream_factory,
l_parser type ref to if_ixml_parser,
l_istream type ref to if_ixml_istream,
l_document type ref to if_ixml_document,
l_node type ref to if_ixml_node,
l_xmldata type string.
data: l_elem type ref to if_ixml_element,
l_root_node type ref to if_ixml_node,
l_next_node type ref to if_ixml_node,
l_name type string,
l_iterator type ref to if_ixml_node_iterator.
data: l_xml_table type table of t_xml_line,
l_xml_line type t_xml_line,
l_xml_table_size type i.
data: l_filename type string.
parameters: pa_file type char1024 default
'd:\joao\desenvolvimentos\fi\fact\teste.xml'.
Validation of XML file: Only DTD included in xml document is supported
parameters: pa_val type char1 as checkbox.
start-of-selection.
Creating the main iXML factory
l_ixml = cl_ixml=>create( ).
Creating a stream factory
l_streamfactory = l_ixml->create_stream_factory( ).
perform get_xml_table changing l_xml_table_size l_xml_table.
wrap the table containing the file into a stream
l_istream = l_streamfactory->create_istream_itable( table =
l_xml_table
size =
l_xml_table_size ).
Creating a document
l_document = l_ixml->create_document( ).
Create a Parser
l_parser = l_ixml->create_parser( stream_factory = l_streamfactory
istream = l_istream
document = l_document ).
Validate a document
if pa_val eq 'X'.
l_parser->set_validating( mode = if_ixml_parser=>co_validate ).
endif.
Parse the stream
if l_parser->parse( ) ne 0.
if l_parser->num_errors( ) ne 0.
data: parseerror type ref to if_ixml_parse_error,
str type string,
i type i,
count type i,
index type i.
count = l_parser->num_errors( ).
write: count, ' parse errors have occured:'.
index = 0.
while index < count.
parseerror = l_parser->get_error( index = index ).
i = parseerror->get_line( ).
write: 'line: ', i.
i = parseerror->get_column( ).
write: 'column: ', i.
str = parseerror->get_reason( ).
write: str.
index = index + 1.
endwhile.
endif.
endif.
Process the document
if l_parser->is_dom_generating( ) eq 'X'.
perform process_dom using l_document.
endif.
*& Form get_xml_table
form get_xml_table changing l_xml_table_size type i
l_xml_table type standard table.
Local variable declaration
data: l_len type i,
l_len2 type i,
l_tab type tsfixml,
l_content type string,
l_str1 type string,
c_conv TYPE REF TO cl_abap_conv_in_ce,
l_itab type table of string.
l_filename = pa_file.
upload a file from the client's workstation
call method cl_gui_frontend_services=>gui_upload
exporting
filename = l_filename
filetype = 'BIN'
importing
filelength = l_xml_table_size
changing
data_tab = l_xml_table
exceptions
others = 19.
if sy-subrc <> 0.
message id sy-msgid type sy-msgty number sy-msgno
with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
endif.
Writing the XML document to the screen
CLEAR l_str1.
LOOP AT l_xml_table INTO l_xml_line.
c_conv = cl_abap_conv_in_ce=>create( input = l_xml_line-data
*replacement = space ).
c_conv->read( IMPORTING data = l_content len = l_len ).
CONCATENATE l_str1 l_content INTO l_str1.
ENDLOOP.
l_str1 = l_str1+0(l_xml_table_size).
SPLIT l_str1 AT cl_abap_char_utilities=>cr_lf INTO TABLE l_itab.
WRITE: /.
WRITE: /' XML File'.
WRITE: /.
LOOP AT l_itab INTO l_str1.
REPLACE ALL OCCURRENCES OF cl_abap_char_utilities=>horizontal_tab
*IN
l_str1 WITH space.
WRITE: / l_str1.
ENDLOOP.
WRITE: /.
endform. "get_xml_table
*& Form process_dom
form process_dom using document type ref to if_ixml_document.
data: node type ref to if_ixml_node,
iterator type ref to if_ixml_node_iterator,
nodemap type ref to if_ixml_named_node_map,
attr type ref to if_ixml_node,
name type string,
prefix type string,
value type string,
indent type i,
count type i,
index type i.
data: name2 type string,
name_root type string,
node_parent type ref to if_ixml_node,
node_root type ref to if_ixml_node,
num_children type i.
node ?= document.
check not node is initial.
uline.
write: /.
write: /' DOM-TREE'.
write: /.
if node is initial. exit. endif.
create a node iterator
iterator = node->create_iterator( ).
get current node
node = iterator->get_next( ).
loop over all nodes
while not node is initial.
indent = node->get_height( ) * 2.
indent = indent + 20.
num_children = node->num_children( ).
case node->get_type( ).
when if_ixml_node=>co_node_element.
element node
name = node->get_name( ).
nodemap = node->get_attributes( ).
node_root = node->get_root( ).
name_root = node_root->get_name( ).
write: / 'ELEMENT :'.
write: at indent name color col_positive inverse.
write: 'NUM_CHILDREN:', num_children.
write: 'ROOT:', name_root.
node_parent = node->get_parent( ).
name2 = node_parent->get_name( ).
write: 'NAME2: ' , name2.
if not nodemap is initial.
attributes
count = nodemap->get_length( ).
do count times.
index = sy-index - 1.
attr = nodemap->get_item( index ).
name = attr->get_name( ).
prefix = attr->get_namespace_prefix( ).
value = attr->get_value( ).
write: / 'ATTRIBUTE:'.
write: at indent name color col_heading inverse, '=',
value color col_total inverse.
enddo.
endif.
when if_ixml_node=>co_node_text or
if_ixml_node=>co_node_cdata_section.
text node
value = node->get_value( ).
write: / 'VALUE :'.
mjprocha
node_parent = node->get_parent( ).
write: at indent value color col_group inverse.
name2 = node_parent->get_name( ).
write: 'NAME2: ' , name2.
endcase.
advance to next node
node = iterator->get_next( ).
endwhile.
endform. "process_dom