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module RGen
module Serializer
class XMLSerializer
INDENT_SPACE = 2
def initialize(file)
@indent = 0
@lastStartTag = nil
@textContent = false
@file = file
end
def serialize(rootElement)
raise "Abstract class, overwrite method in subclass!"
end
def startTag(tag, attributes={})
@textContent = false
handleLastStartTag(false, true)
if attributes.is_a?(Hash)
attrString = attributes.keys.collect{|k| "#{k}=\"#{attributes[k]}\""}.join(" ")
else
attrString = attributes.collect{|pair| "#{pair[0]}=\"#{pair[1]}\""}.join(" ")
end
@lastStartTag = " "*@indent*INDENT_SPACE + "<#{tag} "+attrString
@indent += 1
end
def endTag(tag)
@indent -= 1
unless handleLastStartTag(true, true)
output " "*@indent*INDENT_SPACE unless @textContent
output "</#{tag}>\n"
end
@textContent = false
end
def writeText(text)
handleLastStartTag(false, false)
output "#{text}"
@textContent = true
end
protected
def eAllReferences(element)
@eAllReferences ||= {}
@eAllReferences[element.class] ||= element.class.ecore.eAllReferences
end
def eAllAttributes(element)
@eAllAttributes ||= {}
@eAllAttributes[element.class] ||= element.class.ecore.eAllAttributes
end
def eAllStructuralFeatures(element)
@eAllStructuralFeatures ||= {}
@eAllStructuralFeatures[element.class] ||= element.class.ecore.eAllStructuralFeatures
end
def eachReferencedElement(element, refs, &block)
refs.each do |r|
targetElements = element.getGeneric(r.name)
targetElements = [targetElements] unless targetElements.is_a?(Array)
targetElements.each do |te|
yield(r,te)
end
end
end
def containmentReferences(element)
@containmentReferences ||= {}
@containmentReferences[element.class] ||= eAllReferences(element).select{|r| r.containment}
end
private
def handleLastStartTag(close, newline)
return false unless @lastStartTag
output @lastStartTag
output close ? "/>" : ">"
output "\n" if newline
@lastStartTag = nil
true
end
def output(text)
@file.write(text)
end
end
end
end
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