Class: CrossLanguageSpotter::OracleLoader

Inherits:
Object
  • Object
show all
Defined in:
lib/crosslanguagespotter/oracle.rb

Instance Method Summary collapse

Instance Method Details

#build_weka_classifier(srcpath, oraclepath) ⇒ Object 



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# File 'lib/crosslanguagespotter/oracle.rb', line 16

def build_weka_classifier(srcpath,oraclepath)        
    features_data = to_train_data(srcpath,oraclepath)
    data = []
    features_data.each do |rel,row|
        data.push(row)
    end
    keys = {    
        shared_length: :numeric,
        tfidf_shared: :numeric,
        itfidf_shared: :numeric,
        perc_shared_length_min: :numeric,
        perc_shared_length_max: :numeric,
        diff_min: :numeric,
        diff_max: :numeric,
        perc_diff_min: :numeric,
        perc_diff_max: :numeric,
        context: :numeric,
        jaccard: :numeric,
        jaro: :numeric,
        tversky: :numeric,
        result: :boolean
    }
    train_instances = hash2weka_instances("oracle",data,keys,:result)
    WekaClassifier.new(train_instances)
end

#to_train_data(srcpath, oraclepath) ⇒ Object

TODO Make it private



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# File 'lib/crosslanguagespotter/oracle.rb', line 43

def to_train_data(srcpath,oraclepath)
    project = Project.new(srcpath)

    spotter = Spotter.new
    features = spotter.features_for_project(project)

    @file_lines = Hash.new do |h,k|
        h[k] = File.readlines(k)
    end

    ok_a = ok_b = ko_a = ko_b = 0
     
    train_data = {}
    File.open(oraclepath,'r').each_with_index do |input_line,l|  
        input_line.strip!
        unless input_line.start_with?('#')
            values = input_line.split ":"
            if values.count!=8
                raise "Line #{l+1}, error: #{input_line}. Values: #{values}"
            end
            # we order them to facilitate searching for duplicates
            end_a = OracleRelationEnd.new values[0], values[1].to_i, values[2].to_i, values[3]
            end_b = OracleRelationEnd.new values[4], values[5].to_i, values[6].to_i, values[7]
            if end_b.file < end_a.file
                end_a, end_b = end_b, end_a
            end

            file_a         = values[0]
            line_a         = values[1].to_i
            col_a          = values[2].to_i
            surface_form_a = values[3]
            file_b         = values[4]
            line_b         = values[5].to_i
            col_b          = values[6].to_i         
            surface_form_b = values[7]

            file_a = "#{srcpath}/#{file_a}"
            file_b = "#{srcpath}/#{file_b}"

            model_a = project.models[file_a]
            model_b = project.models[file_b]

            raise "Model not found for #{file_a}. Available: #{project.models.keys}" unless model_a                    
            raise "Model not found for #{file_b}. Available: #{project.models.keys}" unless model_b

            plain_col_a = convert_from_tabcolumn_to_plaincolumn(file_a,line_a,col_a)
            plain_col_b = convert_from_tabcolumn_to_plaincolumn(file_b,line_b,col_b)

            pos_a = SourcePosition.new(SourcePoint.new(line_a,plain_col_a),SourcePoint.new(line_a,plain_col_a+surface_form_a.length-1))
            pos_b = SourcePosition.new(SourcePoint.new(line_b,plain_col_b),SourcePoint.new(line_b,plain_col_b+surface_form_b.length-1))
            begin
                node_a = find_node(model_a,surface_form_a,pos_a)
                ok_a+=1
            rescue Exception => e
                ko_a+=1
                puts "Line #{l+1}) problem with '#{surface_form_a}', file: #{file_a}, pos #{pos_a}: #{e}"
            end
            begin
                node_b = find_node(model_b,surface_form_b,pos_b)
                ok_b+=1
            rescue Exception => e
                ko_b+=1
                puts "Line #{l+1}) problem with '#{surface_form_b}', file: #{file_b}, pos #{pos_b}: #{e}"
            end

            if node_a and node_b
                trindex_a = traverse_index(node_a)
                trindex_b = traverse_index(node_b)

                metaoracle_end_a = MetaOracleRelationEnd.new file_a,trindex_a
                metaoracle_end_b = MetaOracleRelationEnd.new file_b,trindex_b
                if metaoracle_end_b.file < metaoracle_end_a.file
                    metaoracle_end_a, metaoracle_end_b = metaoracle_end_b, metaoracle_end_a
                end
                #if metaoracle_values.values.include?([metaoracle_end_a,metaoracle_end_b])
                #    raise "Line #{l+1} (#{[metaoracle_end_a,metaoracle_end_b]}) is a duplicate of line #{metaoracle_values.find {|k,v| v==[metaoracle_end_a,metaoracle_end_b]}}"
                #else
                #    metaoracle_values[l+1] = [metaoracle_end_a,metaoracle_end_b]
                #end 

                id_a = NodeId.from_node(node_a)
                id_b = NodeId.from_node(node_b)
                rel = CrossLanguageRelation.new([id_a,id_b])
                f = features[rel]
                raise "Unknown features for #{rel} (a:#{node_a.source.artifact(:absolute).filename} L#{node_a.source.position(:absolute).begin_line},b:#{node_b.source.artifact(:absolute).filename} L#{node_b.source.position(:absolute).begin_line})" unless f
                entry = { result: true }
                f.each do |k,v|
                    entry[k] = v
                end
                train_data[rel] = entry
            end
        end        
    end

    # all the others are implicitly negative examples
    project.iter_over_shared_ids_instances do |node_a,node_b| 
        id_a = NodeId.from_node(node_a)
        id_b = NodeId.from_node(node_b)
        rel = CrossLanguageRelation.new([id_a,id_b])
        unless train_data.has_key?(rel)
            f = features[rel]
            entry = { result: false }
            f.each do |k,v|
                entry[k] = v
            end
            train_data[rel] = entry
        end
    end

    return train_data
end