Class: Resolv::DNS::Name

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(labels, absolute = true) ⇒ Name

Returns a new instance of Name.



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# File 'lib/resolv.rb', line 976

def initialize(labels, absolute=true)
  @labels = labels
  @absolute = absolute
end

Class Method Details

.create(arg) ⇒ Object 



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# File 'lib/resolv.rb', line 965

def self.create(arg)
  case arg
  when Name
    return arg
  when String
    return Name.new(Label.split(arg), /\.\z/ =~ arg ? true : false)
  else
    raise ArgumentError.new("cannot interpret as DNS name: #{arg.inspect}")
  end
end

Instance Method Details

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



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# File 'lib/resolv.rb', line 989

def ==(other)
  return false unless Name === other
  return @labels == other.to_a && @absolute == other.absolute?
end

#[](i) ⇒ Object 



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# File 'lib/resolv.rb', line 1025

def [](i)
  return @labels[i]
end

#absolute? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/resolv.rb', line 985

def absolute?
  return @absolute
end

#hash ⇒ Object 



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# File 'lib/resolv.rb', line 1013

def hash
  return @labels.hash ^ @absolute.hash
end

#inspect ⇒ Object 



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# File 'lib/resolv.rb', line 981

def inspect
  "#<#{self.class}: #{self.to_s}#{@absolute ? '.' : ''}>"
end

#length ⇒ Object 



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# File 'lib/resolv.rb', line 1021

def length
  return @labels.length
end

#subdomain_of?(other) ⇒ Boolean

tests subdomain-of relation.

domain = Resolv::DNS::Name.create("y.z")
p Resolv::DNS::Name.create("w.x.y.z").subdomain_of?(domain) #=> true
p Resolv::DNS::Name.create("x.y.z").subdomain_of?(domain) #=> true
p Resolv::DNS::Name.create("y.z").subdomain_of?(domain) #=> false
p Resolv::DNS::Name.create("z").subdomain_of?(domain) #=> false
p Resolv::DNS::Name.create("x.y.z.").subdomain_of?(domain) #=> false
p Resolv::DNS::Name.create("w.z").subdomain_of?(domain) #=> false

Returns:

  • (Boolean)

Raises:

  • (ArgumentError) 


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# File 'lib/resolv.rb', line 1005

def subdomain_of?(other)
  raise ArgumentError, "not a domain name: #{other.inspect}" unless Name === other
  return false if @absolute != other.absolute?
  other_len = other.length
  return false if @labels.length <= other_len
  return @labels[-other_len, other_len] == other.to_a
end

#to_a ⇒ Object 



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# File 'lib/resolv.rb', line 1017

def to_a
  return @labels
end

#to_s ⇒ Object

returns the domain name as a string.

The domain name doesn't have a trailing dot even if the name object is absolute.

p Resolv::DNS::Name.create("x.y.z.").to_s #=> "x.y.z"
p Resolv::DNS::Name.create("x.y.z").to_s #=> "x.y.z"


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# File 'lib/resolv.rb', line 1037

def to_s
  return @labels.join('.')
end