Escape XML special characters in XSLT transformation enum values

[Copilot]

Enum values containing XML special characters (<, >, &, ", ') cause syntax errors in generated XSLT transformations.

Changes

• Added escape_xml_chars method to zcl_aff_writer_xslt

  • Escapes & first to prevent double-escaping of subsequent replacements
  • Maps: & → &, < → <, > → >, " → ", ' → '

• Modified get_abap_value method to apply escaping for character and numeric text types

• Added test coverage for enum values with special characters

Example

Before this fix, an enum like:

BEGIN OF co_enum_values,
  less_than    TYPE c LENGTH 1 VALUE '<',
  greater_than TYPE c LENGTH 1 VALUE '>',
END OF co_enum_values.

Would generate invalid XSLT:

<tt:value ref="FIELD" map="val('<')=xml('lessThan')"/>

Now generates valid escaped XSLT:

<tt:value ref="FIELD" map="val('&#60;')=xml('lessThan')"/>

Original prompt

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This section details on the original issue you should resolve

<issue_title>Transformation Generator does not escape special characters</issue_title> <issue_description>XML cannot handle special characters such as '<' and '>'. The generator does not escape these characters which leads to syntax errors in the generated transformation when having an enum/constant like

begin of co_enum_values
   less_than type c length 1 value '<',
   greater_thean type c length 1 value '>',
end of co_enum_values.

A solution would be to replace < with &#60 and > with &#62 in the generated transformation. </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes SAP/abap-file-formats-tools#319

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