Nick Wellnhofer > Lucy-0.5.1 > Lucy::Analysis::Analyzer

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Module Version: 0.005001   Source   Latest Release: Lucy-0.6.0.4

NAME ^

Lucy::Analysis::Analyzer - Tokenize/modify/filter text.

SYNOPSIS ^

    # Abstract base class.

DESCRIPTION ^

An Analyzer is a filter which processes text, transforming it from one form into another. For instance, an analyzer might break up a long text into smaller pieces (RegexTokenizer), or it might perform case folding to facilitate case-insensitive search (Normalizer).

CONSTRUCTORS ^

new

    package MyAnalyzer;
    use base qw( Lucy::Analysis::Analyzer );
    our %foo;
    sub new {
        my $self = shift->SUPER::new;
        my %args = @_;
        $foo{$$self} = $args{foo};
        return $self;
    }

Abstract constructor. Takes no arguments.

ABSTRACT METHODS ^

transform

    my $inversion = $analyzer->transform($inversion);

Take a single Inversion as input and returns an Inversion, either the same one (presumably transformed in some way), or a new one.

METHODS ^

transform_text

    my $inversion = $analyzer->transform_text($text);

Kick off an analysis chain, creating an Inversion from string input. The default implementation simply creates an initial Inversion with a single Token, then calls transform(), but occasionally subclasses will provide an optimized implementation which minimizes string copies.

split

    my $arrayref = $analyzer->split($text);

Analyze text and return an array of token texts.

dump

    my $obj = $analyzer->dump();

Dump the analyzer as hash.

Subclasses should call dump() on the superclass. The returned object is a hash which should be populated with parameters of the analyzer.

Returns: A hash containing a description of the analyzer.

load

    my $obj = $analyzer->load($dump);

Reconstruct an analyzer from a dump.

Subclasses should first call load() on the superclass. The returned object is an analyzer which should be reconstructed by setting the dumped parameters from the hash contained in dump.

Note that the invocant analyzer is unused.

Returns: An analyzer.

INHERITANCE ^

Lucy::Analysis::Analyzer isa Clownfish::Obj.

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