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iXML Library, DOM Representation

DOM representation of XML data.

Other versions: 7.31 | 7.40 | 7.54

Source Code

REPORT demo_ixml_dom.

CLASS ixml_demo DEFINITION.
  PUBLIC SECTION.
    CLASS-METHODS main.
ENDCLASS.

CLASS ixml_demo IMPLEMENTATION.
  METHOD main.
    DATA(out) = cl_demo_output=>new(
      )->begin_section( `XML-Data` ).
    DATA(xml) =
     `<?xml version="1.0"?>` &&
     `<order number="4711"` &&
     ` xmlns:demo="http://www.sap.com/abapdemos">` &&
     `<!-- Head and body of order -->` &&
     ` <demo:head>` &&
     ` <demo:status>confirmed</demo:status>` &&
     ` <demo:date format="mm-dd-yyyy">07-19-2012</demo:date>` &&
     ` </demo:head>` &&
     ` <demo:body>`  &&
     ` <demo:item units="2" price="17.00">Part No. 0110</demo:item>` &&
     ` <demo:item units="1" price="10.50">Part No. 1609</demo:item>` &&
     ` <demo:item units="5" price="12.30">Part No. 1710</demo:item>` &&
     ` </demo:body>` &&
     `</order>`.
    out->write_xml( xml ).

    out->next_section( `XML-Document in DOM-Format` ).
    TYPES: BEGIN OF t_node,
            gid     TYPE i,
            type    TYPE i,
            prefix  TYPE string,
            name    TYPE string,
            value   TYPE string,
          END OF t_node.
    DATA node_tab TYPE STANDARD TABLE OF t_node.
    DATA(ixml)          = cl_ixml=>create( ).
    DATA(document)      = ixml->create_document( ).
    TRY.
        CALL TRANSFORMATION id SOURCE XML xml
                               RESULT XML document.
      CATCH cx_transformation_error.
        RETURN.
    ENDTRY.
    DATA(iterator) = document->create_iterator( ).
    DO.
      DATA(node) = iterator->get_next( ).
      IF node IS INITIAL.
        EXIT.
      ENDIF.
      APPEND VALUE #(
        gid     = node->get_gid( )
        type    = node->get_type( )
        prefix  = node->get_namespace_prefix( )
        name    = node->get_name( )
        value   = node->get_value( ) ) TO node_tab.
    ENDDO.
    out->write_data( node_tab ).

    TYPES: BEGIN OF t_attribute,
             name  TYPE string,
             value TYPE string,
           END OF t_attribute.
    DATA attribute_tab TYPE STANDARD TABLE OF t_attribute.
    iterator->reset( ).
    DO.
      node = iterator->get_next( ).
      IF node IS INITIAL.
        EXIT.
      ENDIF.
      DATA(attributes) = node->get_attributes( ).
      IF attributes IS INITIAL OR attributes->get_length( ) = 0.
        CONTINUE.
      ENDIF.
      CLEAR attribute_tab.
      DO.
        DATA(attribute) = attributes->get_item( sy-index - 1 ).
        IF attribute IS INITIAL.
          EXIT.
        ENDIF.
        APPEND VALUE #(
          name  = attribute->get_name( )
          value = attribute->get_value( ) ) TO attribute_tab.
      ENDDO.
      out->begin_section( |Attributes of GID { node->get_gid( ) }|
        )->write_data( attribute_tab
        )->end_section( ).
    ENDDO.

    out->display( ).
  ENDMETHOD.
ENDCLASS.

START-OF-SELECTION.
  ixml_demo=>main( ).

Description

XML data is transformed to its DOM representation using the identity transformation ID. An iterator is used to extract all DOM nodes and pass their most important properties to an internal table, which then becomes the output. A second iteration extracts the attributes of elements, whose internal table also becomes the output.

Note

The GID is a unique internal indexing of a node.