Class: Ferret::Index::FieldsWriter

Inherits:
Object
  • Object
show all
Defined in:
lib/ferret/index/fields_io.rb

Constant Summary collapse

FIELD_IS_TOKENIZED = 
0X1
FIELD_IS_BINARY = 
0X2
FIELD_IS_COMPRESSED = 
0X4

Instance Method Summary collapse

Constructor Details

#initialize(dir, segment, fi) ⇒ FieldsWriter

Returns a new instance of FieldsWriter.



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# File 'lib/ferret/index/fields_io.rb', line 109

def initialize(dir, segment, fi)
  @field_infos = fi
  @fields_stream = dir.create_output(segment + ".fdt")
  @index_stream = dir.create_output(segment + ".fdx")
end

Instance Method Details

#add_document(doc) ⇒ Object Also known as: << 



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# File 'lib/ferret/index/fields_io.rb', line 120

def add_document(doc)
  @index_stream.write_long(@fields_stream.pos)
  stored_count = 0
  doc.all_fields.each() { |field| stored_count += 1 if field.stored?() }
  @fields_stream.write_vint(stored_count)
  
  doc.all_fields.each() do |field|
    if (field.stored?())
      @fields_stream.write_vint(@field_infos.field_number(field.name))

      bits = 0
      bits |= FIELD_IS_TOKENIZED if field.tokenized?
      bits |= FIELD_IS_BINARY if field.binary?
      bits |= FIELD_IS_COMPRESSED if field.compressed?
      @fields_stream.write_byte(bits)
      
      data = nil
      if field.compressed?
        if field.binary? 
          data = compress(field.binary_value)
        else
          data = compress(field.string_value)
        end
        save_data(data)
      else
        if field.binary?
          save_data(field.binary_value)
        else
          @fields_stream.write_string(field.string_value)
        end
      end
    end
  end
end

#close ⇒ Object 



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# File 'lib/ferret/index/fields_io.rb', line 115

def close()
  @fields_stream.close()
  @index_stream.close()
end