Using a calculated value for a property's InitialExpression. Written in Intersystems Cache Object Script.

Calculated InitialExpression

...class definition

/// Set InitialExpression to any class method returning the calculated value.
/// In this case, I'm returning a string value.
Property BaseDirectoryPath As %String [ InitialExpression = {..GetBaseDirectoryForNamespace()} ];

/// Returns the base directory path to use for whatever cache instance the class is being used in.
ClassMethod GetBaseDirectoryForNamespace() As %String
{	
	SET vPath = $CASE($Namespace,
		"MCCRDA":"/home/mccrda/stage/control/",
		 "STAGE":"/home/ensemble/stage/control/",
		  "PROD":"/home/ensemble/prod/control/",
		 "PROD2":"/home/ensemble2/prod2/control",
			:"/home/raczta/stage/control/")
				
	Quit vPath
}