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24 lines
1.0 KiB
Plaintext
24 lines
1.0 KiB
Plaintext
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The module Data::Flow provides its services via objects.
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The objects may be obtained by the usual
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$request = new Data::Flow $recipes;
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paradigm. The argument $recipes is a hash reference, which
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provides the rules for request processing. The objects
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support two methods, set() and get(). The first one is
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used to provide input data for processing, the second one
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to obtain the output.
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The unit of requested information is a field. The method
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set() takes a pair field => value, the method get() takes
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one argument: the field.
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Every object is created without any fields filled, but it
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knows how to construct fields basing on other fields or
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some global into. This knowledge is provided in the
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argument $recipe of the new() function. This is a
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reference to a hash, keyed by fields. The values of this
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hash are hash references themselves, which describe how to
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acquire the field which is the corresponding key of the
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initial hash.
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