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Lucy::Index::Lexicon – Apache Lucy Documentation
Apache Lucy™

NAME

Lucy::Index::Lexicon - Iterator for a field’s terms.

SYNOPSIS

my $lex_reader = $seg_reader->obtain('Lucy::Index::LexiconReader');
my $lexicon = $lex_reader->lexicon( field => 'content' );
while ( $lexicon->next ) {
   print $lexicon->get_term . "\n";
}

DESCRIPTION

A Lexicon is an iterator which provides access to all the unique terms for a given field in sorted order.

If an index consists of two documents with a ‘content’ field holding “three blind mice” and “three musketeers” respectively, then iterating through the ‘content’ field’s lexicon would produce this list:

blind
mice
musketeers
three

ABSTRACT METHODS

seek

$lexicon->seek($target);
$lexicon->seek();  # default: undef

Seek the Lexicon to the first iterator state which is greater than or equal to target. If target is undef, reset the iterator.

next

my $bool = $lexicon->next();

Proceed to the next term.

Returns: true until the iterator is exhausted, then false.

reset

$lexicon->reset();

Reset the iterator. next() must be called to proceed to the first element.

get_term

my $obj = $lexicon->get_term();

Return the current term, or undef if the iterator is not in a valid state.

INHERITANCE

Lucy::Index::Lexicon isa Clownfish::Obj.