Jul 20, 2023

Perl extension for simple-minded recipe-controlled build of data

The module DataFlow provides its services via objects. The objects may be obtained by the usual

     $request = new DataFlow $recipes;

paradigm. The argument $recipes is a hash reference, which provides the rules for request processing. The objects support two methods, set and get. The first one is used to provide input data for processing, the second one to obtain the output.

The unit of requested information is a field. The method set takes a pair field => value, the method get takes one argument the field.

Every object is created without any fields filled, but it knows how to construct fields basing on other fields or some global into. This knowledge is provided in the argument $recipe of the new function. This is a reference to a hash, keyed by fields. The values of this hash are hash references themselves, which describe how to acquire the field which is the corresponding key of the initial hash.

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