Class: ActiveTriples::PropertyBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/active_triples/property_builder.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, options, &block) ⇒ PropertyBuilder

Returns a new instance of PropertyBuilder.



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# File 'lib/active_triples/property_builder.rb', line 6

def initialize(name, options, &block)
  @name = name
  @options = options
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/active_triples/property_builder.rb', line 4

def name
  @name
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/active_triples/property_builder.rb', line 4

def options
  @options
end

Class Method Details

.build(model, name, options, &block) ⇒ Object 



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# File 'lib/active_triples/property_builder.rb', line 23

def self.build(model, name, options, &block)
  builder = create_builder name, options, &block
  reflection = builder.build(&block)
  define_accessors model, reflection, options
  reflection
end

.create_builder(name, options, &block) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/active_triples/property_builder.rb', line 11

def self.create_builder(name, options, &block)
  raise ArgumentError, "property names must be a Symbol" unless
    name.kind_of?(Symbol)

  options[:predicate] = RDF::Resource.new(options[:predicate])
  raise ArgumentError, "must provide an RDF::Resource to :predicate" unless
    options[:predicate].valid?


  new(name, options, &block)
end

.define_accessors(model, reflection, options = {}) ⇒ Object 



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# File 'lib/active_triples/property_builder.rb', line 30

def self.define_accessors(model, reflection, options={})
  mixin = model.generated_property_methods
  name = reflection.term
  define_readers(mixin, name)
  define_id_reader(model, name) unless options[:cast] == false
  define_writers(mixin, name)
end

.define_id_reader(mixin, name) ⇒ Object 



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# File 'lib/active_triples/property_builder.rb', line 46

def self.define_id_reader(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}_ids(*args)
      get_values(:#{name}, :cast => false)
    end
  CODE
end

.define_readers(mixin, name) ⇒ Object 



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# File 'lib/active_triples/property_builder.rb', line 38

def self.define_readers(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}(*args)
      get_values(:#{name})
    end
  CODE
end

.define_writers(mixin, name) ⇒ Object 



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# File 'lib/active_triples/property_builder.rb', line 54

def self.define_writers(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name}=(value)
      set_value(:#{name}, value)
    end
  CODE
end

Instance Method Details

#build(&block) ⇒ Object 



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# File 'lib/active_triples/property_builder.rb', line 62

def build(&block)
  NodeConfig.new(name,
                 options[:predicate],
                 options.except(:predicate)) do |config|
    config.with_index(&block) if block_given?
  end
end