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package Plucene::Search::Filter; |
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=head1 NAME |
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Plucene::Search::Filter - A search filter base class |
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=head1 DESCRIPTION |
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This doesn't seem to be being used just yet. But here is some info |
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on filters: |
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Filtering means imposing additional restriction on the hit list to |
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eliminate hits that otherwise would be included in the search results. |
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There are two ways to filter hits: |
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=over 4 |
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=item * Search Query - in this approach, provide your custom filter object |
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to the when you call the search() method. This filter will be called exactly |
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once to evaluate every document that resulted in non zero score. |
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=item * Selective Collection - in this approach you perform the regular |
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search and when you get back the hit list, collect only those that matches |
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your filtering criteria. In this approach, your filter is called only for |
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hits that returned by the search method which may be only a subset of the |
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non zero matches (useful when evaluating your search filter is expensive). |
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=back |
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=cut |
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use strict; |
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use warnings; |
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=head1 METHODS |
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=head2 bits |
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This must be defined in a subclass |
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=cut |
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sub bits { die "bits must be defined in a subclass" } |
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1; |