Module: LightModels::ParserWrapper

Defined in:
lib/lightmodels/parsing.rb

Constant Summary collapse

JavaCollection = 
::Java::JavaClass.for_name("java.util.Collection")
@@verbose = 
false

Instance Method Summary collapse

Instance Method Details

#adapter(model_class, ref) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 35

def adapter(model_class,ref)
	if adapter_specific_class(model_class,ref)
		adapter_specific_class(model_class,ref)
	else
		if model_class.superclass!=Object
			adapter(model_class.superclass,ref) 
		else
			nil
		end
	end
end

#assign_att_to_model(model, att, value) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 78

def assign_att_to_model(model,att,value)
	if att.many
		adder_method = :"add#{att.name.capitalize}"
		value.each {|el| model.send(adder_method,el)}
	else
		setter_method = :"#{att.name}="
		raise "Trying to assign an array to a single property. Class #{model.class}, property #{att.name}" if value.is_a?(::Array)
		model.send(setter_method,value)
	end
end

#assign_ref_to_model(model, ref, value) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 62

def assign_ref_to_model(model,ref,value)
	return unless value==nil # we do not need to assign a nil...
	if ref.many
		adder_method = :"add#{ref.name.capitalize}"
		value.each {|el| model.send(adder_method,node_to_model(el))}
	else
		setter_method = :"#{ref.name}="
		raise "Trying to assign an array to a single property. Class #{model.class}, property #{ref.name}" if value.is_a?(::Array)
		model.send(setter_method,node_to_model(value))
	end
rescue Object => e
	puts "Problem while assigning ref #{ref.name} (many? #{ref.many}) to #{model.class}. Value: #{value.class}"
	puts "\t<<#{e}>>"
	raise e
end

#attribute_to_method(model_class, att) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 55

def attribute_to_method(model_class,att)
	s = att.name
	adapted = adapter(model_class,att)
	s = adapted if adapted		
	s.to_sym
end

#get_feature_value(node, feat) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 174

def get_feature_value(node,feat)
	adapter = adapter(node.class,feat)		
	if adapter
		#puts "Using adapter for #{node.class} #{feat_name}"
		adapter[:adapter].call(node)
	else
		get_feature_value_through_getter(node,feat.name)
	end
end

#get_feature_value_through_getter(node, feat_name) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 158

def get_feature_value_through_getter(node,feat_name)
	capitalized_name = feat_name.proper_capitalize
	methods = [:"get#{capitalized_name}",:"is#{capitalized_name}"]

	methods.each do |m|
		if node.respond_to?(m)
			begin
				return transform_enum_values(node.send(m))
			rescue Object => e
				raise "Problem invoking #{m} on #{node.class}: #{e}"
			end
		end
	end
	raise "how should I get this... #{feat_name} on #{node.class}. It does not respond to #{methods}"
end

#log(msg) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 133

def log(msg)
	puts msg if @@verbose
end

#node_to_model(node) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 137

def node_to_model(node)
	log("node_to_model #{node.class}")
	metaclass = get_corresponding_metaclass(node)
	instance = metaclass.new
	metaclass.ecore.eAllAttributes.each do |attr|
		populate_attr(node,attr,instance)
	end
	metaclass.ecore.eAllReferences.each do |ref|
		populate_ref(node,ref,instance)
	end
	instance
end

#populate_attr(node, att, model) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 89

def populate_attr(node,att,model)	
	value = get_feature_value(node,att)
	#puts "Value got for #{node.class} #{att} : #{value.class}"
	# nil are ignored
	model.send(:"#{att.name}=",value) if value!=nil
rescue Object => e
	puts "Problem while populating attribute #{att.name} of #{model} from #{node}. Value: #{value}"
	raise e
end

#populate_ref(node, ref, model) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 99

def populate_ref(node,ref,model)
	log("populate ref #{ref.name}, node: #{node.class}, model: #{model.class}")
	value = get_feature_value(node,ref)
	log("\tvalue=#{value.class}")
	if value!=nil
		if value==node
			puts "avoiding loop... #{ref.name}, class #{node.class}" 
			return
		end
		if JavaCollection.assignable_from?(value.java_class)
			log("\tvalue is a collection")
			capitalized_name = ref.name.proper_capitalize				
			value.each do |el|
				unless el.respond_to?(:parent)
					class << el
						attr_accessor :parent						
					end
				end
				el.parent = node
				model.send(:"add#{capitalized_name}",node_to_model(el))
			end
		else
			log("\tvalue is not a collection")
			unless value.respond_to?(:parent)
				class << value
					attr_accessor :parent
				end
			end
			value.parent = node
			model.send(:"#{ref.name}=",node_to_model(value))
		end
	end
end

#reference_to_method(model_class, ref) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 47

def reference_to_method(model_class,ref)
	s = ref.name
	#s = 'value' if s=='body'
	adapted = adapter(model_class,ref)
	s = adapted if adapted		
	s.to_sym
end

#transform_enum_values(value) ⇒ Object 



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# File 'lib/lightmodels/parsing.rb', line 150

def transform_enum_values(value)
	if value.respond_to?(:java_class) && value.java_class.enum?
		value.name
	else
		value
	end
end