Class: RGen::ModelComparatorBase

Inherits:
Object
  • Object
show all
Defined in:
lib/rgen/model_comparator_base.rb

Defined Under Namespace

Classes: CompareSpec

Constant Summary collapse

INDENT = 
"  "

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Class Attribute Details

.compareSpecs ⇒ Object (readonly)

Returns the value of attribute compareSpecs.



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# File 'lib/rgen/model_comparator_base.rb', line 11

def compareSpecs
  @compareSpecs
end

Class Method Details

.compare_spec(clazz, hash) ⇒ Object 



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# File 'lib/rgen/model_comparator_base.rb', line 13

def compare_spec(clazz, hash)
	@compareSpecs ||= {}
	raise "Compare spec already defined for #{clazz}" if @compareSpecs[clazz]
	spec = CompareSpec.new
	hash.each_pair do |k,v|
		spec.send("#{k}=",v)
	end
	@compareSpecs[clazz] = spec
end

Instance Method Details

#compare(as, bs, recursive = true) ⇒ Object

compares two sets of elements



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# File 'lib/rgen/model_comparator_base.rb', line 25

def compare(as, bs, recursive=true)
	result = []
	aById = as.select{|e| useElement?(e)}.inject({}){|r, e| r[elementIdentifier(e)] = e; r}
	bById = bs.select{|e| useElement?(e)}.inject({}){|r, e| r[elementIdentifier(e)] = e; r}
	onlyA = sortElements((aById.keys - bById.keys).collect{|id| aById[id]})
	onlyB = sortElements((bById.keys - aById.keys).collect{|id| bById[id]})
	aAndB = sortElementPairs((aById.keys & bById.keys).collect{|id| [aById[id], bById[id]]})
	onlyA.each do |e|
		result << "- #{elementDisplayName(e)}"
	end
	onlyB.each do |e|
		result << "+ #{elementDisplayName(e)}"
	end
	if recursive
		aAndB.each do |ab|
			a, b = *ab
			r = compareElements(a, b)
			if r.size > 0
				result << "#{elementDisplayName(a)}"
				result += r.collect{|l| INDENT+l}
			end
		end
	end
	result
end

#compareElements(a, b) ⇒ Object 



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# File 'lib/rgen/model_comparator_base.rb', line 76

def compareElements(a, b)
	result = []
	if a.class != b.class
		result << "Class: #{a.class} -> #{b.class}"
	else
		a.class.ecore.eAllStructuralFeatures.reject{|f| f.derived || compareSpec(a).andand.ignore_features.andand.include?(f.name.to_sym)}.each do |f|
			va, vb = a.getGeneric(f.name), b.getGeneric(f.name)
			if f.is_a?(RGen::ECore::EAttribute)
				r = compareValues(f.name, va, vb)
				result << r if r
			else
				va, vb = [va].compact, [vb].compact unless f.many
				r = compare(va, vb, f.containment || compareSpec(a).andand.recurse.andand.include?(f.name.to_sym))
				if r.size > 0
					result << "[#{f.name}]"
					result += r.collect{|l| INDENT+l}
				end
			end	
		end
	end
	result
end

#compareSpec(element) ⇒ Object 



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# File 'lib/rgen/model_comparator_base.rb', line 127

def compareSpec(element)
	@compareSpec ||= {}
	return @compareSpec[element.class] if @compareSpec[element.class]
	return nil unless self.class.compareSpecs
	key = self.class.compareSpecs.keys.find{|k| element.is_a?(k)}
	@compareSpec[element.class] = self.class.compareSpecs[key]
end

#compareValues(name, val1, val2) ⇒ Object 



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# File 'lib/rgen/model_comparator_base.rb', line 99

def compareValues(name, val1, val2)
	result = nil
	result = "[#{name}] #{val1} -> #{val2}" if val1 != val2
	result
end

#elementDisplayName(e) ⇒ Object 



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# File 'lib/rgen/model_comparator_base.rb', line 68

def elementDisplayName(e)
	if compareSpec(e) && compareSpec(e).display_name
		compareSpec(e).display_name.call(e)
	else
		elementIdentifier(e)
	end
end

#elementIdentifier(element) ⇒ Object 



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# File 'lib/rgen/model_comparator_base.rb', line 105

def elementIdentifier(element)
	cs = compareSpec(element)
	if cs && cs.identifier
		if cs.identifier.is_a?(Proc)
			cs.identifier.call(element)
		else
			cs.identifier
		end
	else
		if element.respond_to?(:name)
			element.name
		else
			element.object_id
		end
	end
end

#sortElementPairs(pairs) ⇒ Object 



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# File 'lib/rgen/model_comparator_base.rb', line 51

def sortElementPairs(pairs)
	pairs.sort do |x,y|
		a, b = x[0], y[0]
		r = a.class.name <=> b.class.name
		r = compareSpec(a).sort.call(a,b) if r == 0 && compareSpec(a) && compareSpec(a).sort
		r
	end
end

#sortElements(elements) ⇒ Object 



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# File 'lib/rgen/model_comparator_base.rb', line 60

def sortElements(elements)
	elements.sort do |a,b|
		r = a.class.name <=> b.class.name
		r = compareSpec(a).sort.call(a,b) if r == 0 && compareSpec(a) && compareSpec(a).sort
		r
	end
end

#useElement?(element) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rgen/model_comparator_base.rb', line 122

def useElement?(element)
	cs = compareSpec(element)
	!(cs && cs.filter) || cs.filter.call(element)
end