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GetSourceCode

Function GetSourceCode(const aSourceNum : Variant) : Variant;

Example​

procedure ScriptEvent(var Value: variant);
begin
  Value := GetSourceCode(1); // 'App'
end;

Usage​

GetSourceCode converts a Velox source number to its canonical code.

Parameters and result

ItemTypeDescription
aSourceNumVariant, constNumeric source; use a listed integral value.
ResultVariantCanonical code string for a recognized value; otherwise Null.

Complete mapping

NumberCode
1App
2EDI
3Web
4API

Behaviour and edge cases

  • With Velox's default loose NullEqualityRule, Null follows the explicit guard. Because the rule is shared across the Velox process, strict or error settings can alter or break that comparison.
  • Use integral constants from this family. Do not depend on Variant coercion from strings, floats or booleans.
  • Unknown comparable values return Null; incompatible arrays/interfaces can raise conversion/operator exceptions that propagate.
  • Source 1/App is the only value that IsSourceInternal treats as internal. IsSourcePartner deliberately treats every other integer—including invalid values—as partner.
  • These codes describe origin; they do not authenticate a caller, validate a channel or prove that data actually arrived through that source.

Additional Technical Info​

GetSourceCode converts a numeric source to its canonical Velox code. The complete map is compiled into product source and is not read from customer configuration.

Implementation

The source evaluates aSourceNum = Null, then uses a case over the listed constants. A recognized branch returns its fixed counterpart; the fallback returns Null. No database or alias configuration is consulted.

Side effects, errors and performance

For supported input the function is pure, does no I/O and runs over a small fixed mapping. Variant comparison or conversion errors propagate.

Related entries

Created 2026-07-15