Hello,
I'm trying to define my own analyzer by doing something like:
#-----------------------------------------------------
require 'ferret'
include Ferret
class MyAnalyzer < Analysis::Analyzer
def token_stream(field, str)
# Display results of analysis
puts 'Analyzing: field:%s str:%s' % [field, str]
t =
Analysis::LowerCaseFilter.new(Analysis::StandardTokenizer.new(str))
while true
n = t.next()
break if n == nil
puts n.to_s
end
return
Analysis::LowerCaseFilter.new(Analysis::StandardTokenizer.new(str))
end
end
puts '== Adding document to index...'
index = Index::Index.new(:analyzer => MyAnalyzer.new())
index << { :content => "The quick brown fox" }
index << { :content => "The cow jumps over the moon" }
puts '== Searching Brown...'
index.search_each('content:Brown') do |doc, score|
puts "Document #{doc} found with a score of #{score}"
end
puts '== Searching Foo...'
index.search_each('content:Foo') do |doc, score|
puts "Document #{doc} found with a score of #{score}"
end
puts '== Searching Brown...'
index.search_each('content:Brown') do |doc, score|
puts "Document #{doc} found with a score of #{score}"
end
puts '== Searching Cow...'
index.search_each('content:Cow') do |doc, score|
puts "Document #{doc} found with a score of #{score}"
end
#-----------------------------------------------------
The output is:
== Adding document to index...
Analyzing: field:content str:
Analyzing: field:content str:
== Searching Brown...
Analyzing: field:content str:Brown
token["brown":0:5:1]
Document 0 found with a score of 0.5
== Searching Foo...
== Searching Brown...
Document 0 found with a score of 0.5
== Searching Cow...
Document 1 found with a score of 0.375
The result is correct, i.e. documents are retrieved as expected.
However, I don't understand why I don't see my 'Analyzing...' comment
with the corresponding string being analyzed, except when searching
for 'Brown', and why I'm getting an empty string in 'Analyzing:
field:content str:' when the 2 documents are pushed into the index.
Any explanations? I appologize if this is a trivial issue; I'm quite
new to Ferret/Lucene. I use ferret-0.10.4 under linux.
Many thanks.
-- Olivier
I'm trying to understand
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