NAME¶
Plucene::Search::Query - base class for queries
SYNOPSIS¶
my $s_query = Plucene::Search::Query::Subclass->new({
boost => $boost_factor});
my $scorer = $s_query->scorer($query, $searcher, $reader);
DESCRIPTION¶
This is an abstract base class for queries.
A query is a specification of the content an properties of the desired
documents. Every search is done by matching a query against the document index
and locating the ones that match the query.
The simplest query specifies a single term (or word) that is to be matched
against a single field (e.g. 'author') of each of the documents in the index.
This kind of query matches any document that contains the term in the
specified field.
A more complex queries may contain nested queries with 'and', 'or', 'not' or
'phrase' relations. Queries may also contains specification of which document
fields to match against the various parts of the query (.e.g. 'authors' and
'title') and hints that may effects the ranking of the matched documents
('boost' factor).
METHODS¶
new¶
my $s_query = Plucene::Search::Query::Subclass->new({
boost => $boost_factor});
boost¶
Get / set this attribute
scorer¶
my $scorer = $s_query->scorer
(Plucene::Search::Query $query, $searcher, $reader);
prepare¶
Does nothing
sum_squared_weights / normalize / _scorer¶
These must be defined in a subclass