Class: ActiveTriples::RepositoryStrategy

Inherits:
Object
  • Object
show all
Includes:
PersistenceStrategy
Defined in:
lib/active_triples/persistence_strategies/repository_strategy.rb

Overview

Persistence strategy for projecting ‘RDFSource` to `RDF::Repositories`.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from PersistenceStrategy

#destroyed?, #graph, #graph=, #persisted?

Constructor Details

#initialize(source) ⇒ RepositoryStrategy

Returns a new instance of RepositoryStrategy.

Parameters:

  • source (RDFSource, RDF::Enumerable) —

    the ‘RDFSource` (or other `RDF::Enumerable` to persist with the strategy.



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# File 'lib/active_triples/persistence_strategies/repository_strategy.rb', line 15

def initialize(source)
  @source = source
end

Instance Attribute Details

#source ⇒ Object (readonly)

Returns the value of attribute source.



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# File 'lib/active_triples/persistence_strategies/repository_strategy.rb', line 10

def source
  @source
end

Instance Method Details

#destroy ⇒ Object

Deletes the resource from the repository.



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# File 'lib/active_triples/persistence_strategies/repository_strategy.rb', line 22

def destroy
  super { source.clear }
end

#erase_old_resource ⇒ Object

Clear out any old assertions in the repository about this node or statement thus preparing to receive the updated assertions.



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# File 'lib/active_triples/persistence_strategies/repository_strategy.rb', line 29

def erase_old_resource
  if source.node?
    repository.statements.each do |statement|
      repository.send(:delete_statement, statement) if
        statement.subject == source
    end
  else
    repository.delete [source.to_term, nil, nil]
  end
end

#persist! ⇒ true

Persists the resource to the repository

Returns:

  • (true) —

    returns true if the save did not error



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# File 'lib/active_triples/persistence_strategies/repository_strategy.rb', line 44

def persist!
  erase_old_resource
  repository << source
  @persisted = true
end

#reload ⇒ Boolean

Repopulates the graph from the repository.

Returns:

  • (Boolean) 


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# File 'lib/active_triples/persistence_strategies/repository_strategy.rb', line 54

def reload
  source << repository.query(subject: source)
  @persisted = true unless source.empty?
  true
end

#repository ⇒ RDF::Repository

Returns The RDF::Repository that the resource will project itself on when persisting.

Returns:

  • (RDF::Repository) —

    The RDF::Repository that the resource will project itself on when persisting.



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# File 'lib/active_triples/persistence_strategies/repository_strategy.rb', line 63

def repository
  @repository ||= set_repository
end