Class: Chronicle::Schema::RDFParsing::GraphTransformer

Inherits:
Object
  • Object
show all
Defined in:
lib/chronicle/schema/rdf_parsing/graph_transformer.rb

Overview

A class that inteprets a DSL to transform a base schema graph into a new one by walking through the types and properties of the base and selecting which ones to include in the new graph.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ GraphTransformer

Returns a new instance of GraphTransformer.



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# File 'lib/chronicle/schema/rdf_parsing/graph_transformer.rb', line 10

def initialize
  @base_graph = nil
  @new_graph = Chronicle::Schema::SchemaGraph.new(default_namespace: 'https://schema.chronicle.app/')
  @current_parent = nil
end

Instance Attribute Details

#base_graph ⇒ Object (readonly)

Returns the value of attribute base_graph.



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# File 'lib/chronicle/schema/rdf_parsing/graph_transformer.rb', line 8

def base_graph
  @base_graph
end

#graph ⇒ Object (readonly)

Returns the value of attribute graph.



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# File 'lib/chronicle/schema/rdf_parsing/graph_transformer.rb', line 8

def graph
  @graph
end

#new_graph ⇒ Object (readonly)

Returns the value of attribute new_graph.



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# File 'lib/chronicle/schema/rdf_parsing/graph_transformer.rb', line 8

def new_graph
  @new_graph
end

Class Method Details

.transform ⇒ Object 



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# File 'lib/chronicle/schema/rdf_parsing/graph_transformer.rb', line 16

def self.transform(&)
  transformer = new
  transformer.start_evaluating(&)

  # TODO: figure out if we need to this still
  transformer.new_graph.properties.each do |property|
    property.domain = property.domain.select do |type_id|
      transformer.new_graph.find_type_by_id(type_id)
    end
  end

  transformer.new_graph.build_references!
  transformer.new_graph
end

.transform_from_file(definition_file_path) ⇒ Object 



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# File 'lib/chronicle/schema/rdf_parsing/graph_transformer.rb', line 31

def self.transform_from_file(definition_file_path)
  dsl_commands = File.read(definition_file_path)
  transform_from_string(dsl_commands)
end

.transform_from_string(dsl_definition) ⇒ Object 



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# File 'lib/chronicle/schema/rdf_parsing/graph_transformer.rb', line 36

def self.transform_from_string(dsl_definition)
  transform do
    instance_eval(dsl_definition)
  end
end

Instance Method Details

#start_evaluating ⇒ Object 



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# File 'lib/chronicle/schema/rdf_parsing/graph_transformer.rb', line 42

def start_evaluating(&)
  instance_eval(&) if block_given?
end