Difference between revisions of "Filter"

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(Created page with "A filter is an atomic adapter which can strip selected granules from the data flow.")
 
 
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A filter is an [[Atomic Adapter|atomic adapter]] which can strip selected granules from the data flow.
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A filter is an [[Atomic adapter|atomic adapter]] which can selectively strip [[Granule|''granules'']] from the data flow.
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Inside the filter, there is some programming logic which checks every input [[Granule|''granule'']], and returns a pass/fail answer.
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Any [[Granule|''granules'']] that fail the test are dropped from the data flow.
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An example: a filter could be set up to drop any word granules that contain a word that starts with a lower case letter.
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Consider the following data flow which originated somewhere up-flow. This is the input to the example filter:
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<pre>
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Word: This
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Word: is
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Word: a
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Word: paragraph
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Para: This is a paragraph
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Word: This
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Word: is
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Word: another
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Word: paragraph
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Para: This is another paragraph
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TextFrame: pos (10, 20), width 20, height 80
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</pre>
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If a filter is set up to drop any words starting with a lower case letter, the output of the filter would become:
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<pre>
 +
Word: This
 +
Para: This is a paragraph
 +
Word: This
 +
Para: This is another paragraph
 +
TextFrame: pos (10, 20), width 20, height 80
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</pre>

Latest revision as of 19:13, 29 December 2013

A filter is an atomic adapter which can selectively strip granules from the data flow.

Inside the filter, there is some programming logic which checks every input granule, and returns a pass/fail answer.

Any granules that fail the test are dropped from the data flow.

An example: a filter could be set up to drop any word granules that contain a word that starts with a lower case letter.

Consider the following data flow which originated somewhere up-flow. This is the input to the example filter:

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

If a filter is set up to drop any words starting with a lower case letter, the output of the filter would become:

Word: This
Para: This is a paragraph
Word: This
Para: This is another paragraph
TextFrame: pos (10, 20), width 20, height 80