Class: Cassandra::Types::Tuple

Inherits:
Cassandra::Type show all
Defined in:
lib/cassandra/types.rb

Instance Attribute Summary

Attributes inherited from Cassandra::Type

#kind

Instance Method Summary collapse

Instance Method Details

#assert(value, message = nil, &block) ⇒ void

This method returns an undefined value.

Asserts that a given value is an Cassandra::Tuple

Parameters:

  • value (Object) —

    value to be validated

  • message (String) (defaults to: nil) —

    error message to use when assertion fails

Yield Returns:

  • (String) —

    error message to use when assertion fails

Raises:

  • (ArgumentError) —

    if the value is not an Cassandra::Tuple

See Also:



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# File 'lib/cassandra/types.rb', line 1074

def assert(value, message = nil, &block)
  Util.assert_instance_of(Cassandra::Tuple, value, message, &block)
  Util.assert(value.size <= @members.size, message, &block)
  @members.each_with_index do |type, i|
    Util.assert_type(type, value[i], message, &block)
  end
  nil
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:



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# File 'lib/cassandra/types.rb', line 1098

def eql?(other)
  other.is_a?(Tuple) && @members == other.members
end

#hash ⇒ Object 



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# File 'lib/cassandra/types.rb', line 1089

def hash
  @hash ||= begin
    h = 17
    h = 31 * h + @kind.hash
    h = 31 * h + @members.hash
    h
  end
end

#new(*values) ⇒ Cassandra::Tuple

Coerces the value to Cassandra::Tuple

Examples:

Creating a tuple

include Cassandra::Types

tuple(varchar, varchar, int).new('Jane', 'Smith', 38) # => (Jane, Smith, 38)

Parameters:

  • values (*Object) —

    tuple values

Returns:

See Also:



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# File 'lib/cassandra/types.rb', line 1057

def new(*values)
  Util.assert(values.size <= @members.size) do
    "too many values: #{values.size} out of max #{@members.size}"
  end
  values.each_with_index do |v, i|
    Util.assert_type(@members[i], v)
  end
  Cassandra::Tuple::Strict.new(@members, values)
end

#to_s ⇒ String

Returns "tuple<type, type, type...>".

Returns:

  • (String) —

    "tuple<type, type, type...>"

See Also:



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# File 'lib/cassandra/types.rb', line 1085

def to_s
  "tuple<#{@members.map(&:to_s).join(', ')}>"
end