Class: RDF::N3::Repository

Inherits:
Repository show all
Defined in:
vendor/bundler/ruby/3.0.0/bundler/gems/rdf-n3-7f928f0a0762/lib/rdf/n3/repository.rb

Overview

Sub-class of RDF::Repository which allows for native lists in different positions.

Constant Summary collapse

DEFAULT_GRAPH =
false

Constants inherited from Repository

Repository::DEFAULT_TX_CLASS

Constants inherited from Dataset

Dataset::ISOLATION_LEVELS

Instance Attribute Summary

Attributes inherited from Repository

#options, #title, #uri

Attributes included from Enumerable

#existentials, #universals

Instance Method Summary collapse

Methods inherited from Repository

#delete_insert, load, #snapshot

Methods included from Transactable

#begin_transaction, #commit_transaction, #rollback_transaction, #transaction

Methods included from Mutable

#<<, add_entailment, #clear, #delete, #delete_insert, #delete_statements, #entail, #entail!, #immutable?, #insert, #load, #method_missing, #mutable?, #respond_to_missing?, #snapshot, #update

Methods included from Util::Aliasing::LateBound

#alias_method

Methods included from Util::Coercions

#coerce_statements

Methods included from Writable

#<<, #insert, #insert_graph, #insert_reader, #insert_statements, #writable?

Methods included from Readable

#readable?

Methods inherited from Dataset

#inspect, #inspect!

Methods included from Queryable

#concise_bounded_description, #first, #first_literal, #first_object, #first_predicate, #first_subject, #first_value, #lint, #query, #query_execute, #query_without_sparql

Methods included from Durable

#durable?, #nondurable?

Methods included from Enumerable

add_entailment, #dump, #each_object, #each_predicate, #each_quad, #each_subject, #each_term, #each_triple, #entail, #enum_graph, #enum_object, #enum_predicate, #enum_quad, #enum_statement, #enum_subject, #enum_term, #enum_triple, #graph?, #invalid?, #method_missing, #object?, #objects, #predicate?, #predicates, #project_graph, #quad?, #quads, #respond_to_missing?, #statement?, #statements, #subject?, #subjects, #term?, #terms, #to_a, #to_h, #to_set, #triple?, #triples, #valid?, #validate!

Methods included from Isomorphic

#bijection_to, #isomorphic_with?

Methods included from Countable

#empty?

Constructor Details

#initialize(uri: nil, title: nil, **options) {|repository| ... } ⇒ Repository

Initializes this repository instance.

Parameters:

  • uri (URI, #to_s) (defaults to: nil)

    (nil)

  • title (String, #to_s) (defaults to: nil)

    (nil)

  • options (Hash{Symbol => Object})

Options Hash (**options):

  • :with_graph_name (Boolean) — default: true

    Indicates that the repository supports named graphs, otherwise, only the default graph is supported.

  • :with_validity (Boolean) — default: true

    Indicates that the repository supports named validation.

  • :transaction_class (Boolean) — default: DEFAULT_TX_CLASS

    Specifies the RDF::Transaction implementation to use in this Repository.

Yields:

  • (repository)

Yield Parameters:



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# File 'vendor/bundler/ruby/3.0.0/bundler/gems/rdf-n3-7f928f0a0762/lib/rdf/n3/repository.rb', line 22

def initialize(uri: nil, title: nil, **options, &block)
  @data = options.delete(:data) || {}
  super do
    if block_given?
      case block.arity
        when 1 then block.call(self)
        else instance_eval(&block)
      end
    end
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class RDF::Mutable

Instance Method Details

#apply_changeset(changeset) ⇒ Object



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# File 'vendor/bundler/ruby/3.0.0/bundler/gems/rdf-n3-7f928f0a0762/lib/rdf/n3/repository.rb', line 155

def apply_changeset(changeset)
  data = @data
  changeset.deletes.each do |del|
    if del.constant?
      data = delete_from(data, del)
    else
      # we need this condition to handle wildcard statements
      query_pattern(del) { |stmt| data = delete_from(data, stmt) }
    end
  end
  changeset.inserts.each { |ins| data = insert_to(data, ins) }
  @data = data
end

#each_expanded_statement {|RDF::Statement| ... } ⇒ Object

Projects statements with lists expanded to first/rest chains

Yields:



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# File 'vendor/bundler/ruby/3.0.0/bundler/gems/rdf-n3-7f928f0a0762/lib/rdf/n3/repository.rb', line 128

def each_expanded_statement(&block)
  if block_given?
    each_statement do |st|
      if st.subject.list?
        st.subject.each_statement(&block)
        st.subject = st.subject.subject
      end
      if st.object.list?
        st.object.each_statement(&block)
        st.object = st.object.subject
      end
      block.call(st)
    end
  end
  enum_for(:each_expanded_statement) unless block_given?
end

#expanded_statementsArray<RDF::Statement>

Returns the expanded statements for this repository

Returns:



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# File 'vendor/bundler/ruby/3.0.0/bundler/gems/rdf-n3-7f928f0a0762/lib/rdf/n3/repository.rb', line 149

def expanded_statements
  each_expanded_statement.to_a
end

#isolation_levelObject



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# File 'vendor/bundler/ruby/3.0.0/bundler/gems/rdf-n3-7f928f0a0762/lib/rdf/n3/repository.rb', line 171

def isolation_level
  :serializable
end

#supports?(feature) ⇒ Boolean

Returns true if this respository supports the given feature.

This repository supports list_terms.

Returns:

  • (Boolean)


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# File 'vendor/bundler/ruby/3.0.0/bundler/gems/rdf-n3-7f928f0a0762/lib/rdf/n3/repository.rb', line 38

def supports?(feature)
  case feature.to_sym
  when :list_terms       then true
  when :rdfstar          then true
  when :snapshots        then false
  else super
  end
end

#to_queryRDF::Query

Creates a query from the statements in this repository, turning blank nodes into non-distinguished variables. This can be used to determine if this repository is logically a subset of another repository.

Returns:



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# File 'vendor/bundler/ruby/3.0.0/bundler/gems/rdf-n3-7f928f0a0762/lib/rdf/n3/repository.rb', line 51

def to_query
  RDF::Query.new do |query|
    each do |statement|
      query.pattern RDF::Query::Pattern.from(statement, ndvars: true)
    end
  end
end