Difference between revisions of "Processor"
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Revision as of 19:50, 29 December 2013
A processor is an atomic adapter which can convert granules into other granules.
Inside the processor, there is some programming logic which will select particular types of input granule, and returns a different granule instead.
The original granules that is converted is normally dropped from the data flow; they are replaced by the newly created 'processed' granules.
A processor will never modify a granule; it's not even able to.
In the Crawler system, once created, a granule is never modified.
A granule is a 'constant' data entity. Instead, a processor can only substitute some of the input granules by newly created granules.
An example: a processor could be set up to substitute any word granules with all uppercase word granules.
Consider the following data flow which originated somewhere up-flow. This is the input to the example processor:
Word: This Word: is Word: a Word: paragraph Para: This is a paragraph Word: This Word: is Word: another Word: paragraph Para: This is another paragraph TextFrame: pos (10, 20), width 20, height 80
The output could look like this:
Word: THIS Word: IS Word: A Word: PARAGRAPH Para: This is a paragraph Word: THIS Word: IS Word: ANOTHER Word: PARAGRAPH Para: This is another paragraph TextFrame: pos (10, 20), width 20, height 80
