class Mongo::Protocol::Serializers::BitVector
Class used to define a bitvector for a MongoDB wire protocol message.
Defines serialization strategy upon initialization.
@api private
Public Class Methods
new(layout)
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Initializes a BitVector
with a layout
@param layout [ Array<Symbol> ] the array of fields in the bit vector
# File lib/mongo/protocol/bit_vector.rb, line 28 def initialize(layout) @masks = {} layout.each_with_index do |field, index| @masks[field] = 2**index if field end end
Public Instance Methods
deserialize(buffer)
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Deserializes vector by decoding the symbol according to its mask
@param [ String ] buffer Buffer containing the vector to be deserialized.
@return [ Array<Symbol> ] Flags contained in the vector
# File lib/mongo/protocol/bit_vector.rb, line 52 def deserialize(buffer) vector = buffer.get_int32 flags = [] @masks.each do |flag, mask| flags << flag if mask & vector != 0 end flags end
serialize(buffer, value, validating_keys = BSON::Config.validating_keys?)
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Serializes vector by encoding each symbol according to its mask
@param buffer [ String ] Buffer to receive the serialized vector @param value [ Array<Symbol> ] Array of flags to encode
@return [ String ] Buffer that received the serialized vector
# File lib/mongo/protocol/bit_vector.rb, line 41 def serialize(buffer, value, validating_keys = BSON::Config.validating_keys?) bits = 0 value.each { |flag| bits |= (@masks[flag] || 0) } buffer.put_int32(bits) end