Base class for analyzers
my $analyzer = Plucene::Analysis::Analyzer::Subclass->new;
This is an abstract base class of Analyzers.
An Analyzer builds TokenStreams, which analyze text. It thus represents a policy for extracting index terms from text.
Typical implementations first build a Tokenizer, which breaks the stream of characters from the Reader into raw Tokens. One or more TokenFilters may then be applied to the output of the Tokenizer.
my $analyzer = Plucene::Analysis::Analyzer::Subclass->new;
This must be defined in a subclass