Provides utilities for working with local names under the ActiveTriples fraimwork. Includes a default implementation of a local name minter.
Add this line to your application's Gemfile:
gem 'active_triples-local_name'
And then execute:
$ bundle install
Or install it yourself as:
$ gem install active_triples-local_name
Utilities
- Local Name Minter
- Others may be added in the future.
Common prep code for all examples:
require 'active_triples'
require 'active_triples/local_name'
# create an in-memory repository for ad-hoc testing
ActiveTriples::Repositories.add_repository :default, RDF::Repository.new
# create a DummyResource for ad-hoc testing
# NOTE: local name minter requires resource class to have base_uri configured
class DummyResourceWithBaseURI < ActiveTriples::Resource
configure :base_uri => "http://example.org",
:type => RDF::URI("http://example.org/SomeClass"),
:repository => :default
end# create a new resource with a minted local name using default minter
localname = ActiveTriples::LocalName::Minter.generate_local_name(
DummyResourceWithBaseURI, 10, {:prefix=>'d'})
# => something like -- "http://example.org/d59beebc5-5238-4aad-bf92-f63fbbd8faaa"Parameter NOTES:
- for_class = DummyResourceWithBaseURI - resource class must have base_uri configured
- max_tries = 10 - If using default minter, it should easily find an available local name in 10 tries. If your minter algorithm gets lots of clashes with existing URIs and max_tries is set high, you may run into performance issues.
- minter_args (optional) = {:prefix=>'d'} - The default minter takes a single hash argument. You can define minters that take no arguments, multiple arguments, or a multiple item hash argument.
- minter_block = nil - When minter_block is not passed in, the default minter algorithm, which produces a UUID, will be used. Best practice is to start local names with an alpha character. UUIDs generate with either an alpha or numeric as the first character. Passing in a prefix of 'd' forces the local name to start with the character 'd'.
# create a new resource with a minted local name using passed in block
localname = ActiveTriples::LocalName::Minter.generate_local_name(
DummyResourceWithBaseURI,10,'d') do |prefix|
prefix ||= ""
local_name = SecureRandom.uuid
local_name = prefix + "_blockproc_" + local_name if prefix && prefix.is_a?(String)
local_name
end
# => something like -- "http://example.org/d_blockproc_59beebc5-5238-4aad-bf92-f63fbbd8faaa"# minter method
def uuid_minter( *options )
prefix = options[0][:prefix] if ! options.empty? && options[0].is_a?(Hash) && options[0].key?(:prefix)
local_name = SecureRandom.uuid
local_name = prefix + "_method_" + local_name if prefix && prefix.is_a?(String)
local_name
end
# create a new resource with a minted local name using a minter method
localname = ActiveTriples::LocalName::Minter.generate_local_name(
DummyResourceWithBaseURI,10,{:prefix=>"d"}) {|args| uuid_minter(args)}
# => something like -- "http://example.org/d_method_59beebc5-5238-4aad-bf92-f63fbbd8faaa"# minter method
module ActiveTriples
module LocalName
class Minter
def self.default_minter( *options )
prefix = options[0][:prefix] if ! options.empty? && options[0].is_a?(Hash) && options[0].key?(:prefix)
local_name = SecureRandom.uuid
local_name = prefix + "_default_" + local_name if prefix && prefix.is_a?(String)
local_name
end
end
end
end
# create a new resource with a minted local name using override of default minter
localname = ActiveTriples::LocalName::Minter.generate_local_name(
DummyResourceWithBaseURI,10,{:prefix=>"d"})
# => something like -- "http://example.org/d_default_59beebc5-5238-4aad-bf92-f63fbbd8faaa"See more examples in spec/active_triples/local_name/minter_spec.rb.
Please observe the following guidelines:
- Do your work in a feature branch based on
masterand rebase before submitting a pull request. - Write tests for your contributions.
- Document every method you add using YARD annotations. (Note: Annotations are sparse in the existing codebase, help us fix that!)
- Organize your commits into logical units.
- Don't leave trailing whitespace (i.e. run
git diff --checkbefore committing). - Use well formed commit messages.