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module OpenTox
class Feature
include OpenTox
def self.find(uri, subjectid=nil)
return nil unless uri
feature = Feature.new uri
if (CONFIG[:yaml_hosts].include?(URI.parse(uri).host))
feature.add_metadata YAML.load(RestClientWrapper.get(uri,{:accept => "application/x-yaml", :subjectid => subjectid}))
else
feature.add_metadata Parser::Owl::Dataset.new(uri).load_metadata
end
feature
end
# provides domain (possible target values) of classification feature
# @return [Array] list with possible target values
def domain
if metadata[OT.acceptValue]
raise "accept value found, remove hack and implement correctly"
else
if @uri=~/feature\/26221/ || @uri=~/feature\/221726/
return ["mutagen" , "nonmutagen"]
end
return [true, false]
end
end
# provides feature type, possible types are "regression" or "classification"
# @return [String] feature type, unknown if OT.isA property is unknown/ not set
def feature_type
case metadata[OT.isA]
when /NominalFeature/
"classification"
when /NumericFeature/
"regression"
else
"unknown"
end
end
end
end
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