The LockSpecification comes from a lockfile (Gem::RequestSet::Lockfile).

A LockSpecification's dependency information is pre-filled from the lockfile.

Methods
I
N
S
Class Public methods
new(set, name, version, source, platform)

Source: show 

# File lib/rubygems/resolver/lock_specification.rb, line 9
def initialize set, name, version, source, platform
  super()

  @name     = name
  @platform = platform
  @set      = set
  @source   = source
  @version  = version

  @dependencies = []
  @spec         = nil
end
Instance Public methods
install(options)

This is a null install as a locked specification is considered installed. options are ignored.

Source: show 

# File lib/rubygems/resolver/lock_specification.rb, line 26
def install options
  destination = options[:install_dir] || Gem.dir

  if File.exist? File.join(destination, 'specifications', spec.spec_name) then
    yield nil
    return
  end

  super
end
spec()

A specification constructed from the lockfile is returned

Source: show 

# File lib/rubygems/resolver/lock_specification.rb, line 47
def spec
  @spec ||= Gem::Specification.new do |s|
    s.name     = @name
    s.version  = @version
    s.platform = @platform

    s.dependencies.concat @dependencies
  end
end