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Contents
require 'vagrant/errors'
module ConfigBuilder
# This defines a registry for classes, and behaves as a factory for registered classes.
#
# @api private
class ClassRegistry
class UnknownEntry < Vagrant::Errors::VagrantError
error_key('unknown_entry', 'config_builder.class_registry')
end
class DuplicateEntry < Vagrant::Errors::VagrantError
error_key('duplicate_entry', 'config_builder.class_registry')
end
def initialize(name)
@name = name
@klasses = {}
end
# Register a class with a given identifier
#
# @param identifier [Symbol]
# @param klass [Class]
#
# @return [void]
def register(identifier, klass)
if @klasses[identifier]
raise DuplicateEntry, :registry => @name,
:identifier => identifier.inspect
else
@klasses[identifier] = klass
end
end
# Retrieve a class associated with the specified identifier
#
# @param identifier [Symbol]
#
# @return [Class]
def retrieve(identifier)
if (klass = @klasses[identifier])
klass
else
raise UnknownEntry, :registry => @name,
:identifier => identifier.inspect,
:identifiers => @klasses.keys
end
end
# Generate a class instance with the given hash
#
# @param hash [Hash] The identifier and options for the new object
# @option hash type [String] The identifier of the class to instantiate
#
# @return [Object] The generated object
def generate(hash)
config = hash.dup
identifier = config.delete('type')
klass = retrieve(identifier)
klass.new_from_hash(hash)
end
def inspect
"<#{self.class}: (#{@name}) keys: #{@klasses.keys.inspect}>"
end
end
end
Version data entries
22 entries across 22 versions & 2 rubygems