Class: SAXMachine::SAXHandler

Inherits:
Nokogiri::XML::SAX::Document
  • Object
show all
Defined in:
lib/sax-machine/sax_handler.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object) ⇒ SAXHandler

Returns a new instance of SAXHandler.



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# File 'lib/sax-machine/sax_handler.rb', line 7

def initialize(object)
  @object = object
  @parsed_configs = {}
end

Instance Attribute Details

#object ⇒ Object (readonly)

Returns the value of attribute object.



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# File 'lib/sax-machine/sax_handler.rb', line 5

def object
  @object
end

Instance Method Details

#cdata_block(string) ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 20

def cdata_block(string)
  characters(string)
end

#characaters_captured? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sax-machine/sax_handler.rb', line 60

def characaters_captured?
  !@value.nil? && !@value.empty?
end

#characters(string) ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 12

def characters(string)
  if parsing_collection?
    @collection_handler.characters(string)
  elsif @element_config
    @value << string
  end
end

#end_element(name) ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 44

def end_element(name)
  if parsing_collection? && @collection_config.name == name
    @object.send(@collection_config.accessor) << @collection_handler.object
    reset_current_collection

  elsif parsing_collection?
    @collection_handler.end_element(name)

  elsif characaters_captured? && !parsed_config?
    mark_as_parsed
    @object.send(@element_config.setter, @value)
  end

  reset_current_tag
end

#mark_as_parsed(element_config = nil) ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 90

def mark_as_parsed(element_config=nil)
  element_config ||= @element_config
  @parsed_configs[element_config] = true unless element_config.collection?
end

#parse_collection_instance_attributes ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 68

def parse_collection_instance_attributes
  instance = @collection_handler.object
  @attrs.each_with_index do |attr_name,index|
    instance.send("#{attr_name}=", @attrs[index + 1]) if index % 2 == 0 && instance.methods.include?("#{attr_name}=")
  end
end

#parse_element_attributes(element_configs) ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 75

def parse_element_attributes(element_configs)
  element_configs.each do |ec|
    unless parsed_config?(ec)
      @object.send(ec.setter, ec.value_from_attrs(@attrs))
      mark_as_parsed(ec)
    end
  end
  @element_config = nil
end

#parsed_config?(element_config = nil) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sax-machine/sax_handler.rb', line 95

def parsed_config?(element_config=nil)
  element_config ||= @element_config
  @parsed_configs[element_config]
end

#parsing_collection? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sax-machine/sax_handler.rb', line 64

def parsing_collection?
  !@collection_handler.nil?
end

#reset_current_collection ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 100

def reset_current_collection
  @collection_handler = nil
  @collection_config  = nil
end

#reset_current_tag ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 105

def reset_current_tag
  @name   = nil
  @attrs  = nil
  @value  = nil
  @element_config = nil
end

#sax_config ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 112

def sax_config
  @object.class.sax_config
end

#set_element_config_for_element_value ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 85

def set_element_config_for_element_value
  @value = ""
  @element_config = sax_config.element_config_for_tag(@name, @attrs)
end

#start_element(name, attrs = []) ⇒ Object 



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# File 'lib/sax-machine/sax_handler.rb', line 24

def start_element(name, attrs = [])
  @name   = name
  @attrs  = attrs

  if parsing_collection?
    @collection_handler.start_element(@name, @attrs)

  elsif @collection_config = sax_config.collection_config(@name)
    @collection_handler = @collection_config.handler
    @collection_handler.start_element(@name, @attrs)

  elsif (element_configs = sax_config.element_configs_for_attribute(@name, @attrs)).any?
    parse_element_attributes(element_configs)
    set_element_config_for_element_value

  else
    set_element_config_for_element_value
  end
end