Class: ActiveSupport::XmlMini_NokogiriSAX::HashBuilder

Inherits:
Nokogiri::XML::SAX::Document
  • Object
show all
Defined in:
lib/active_support/xml_mini/nokogirisax.rb

Overview

Class that will build the hash while the XML document is being parsed using SAX events.

Constant Summary collapse

CONTENT_KEY = 
'__content__'.freeze
HASH_SIZE_KEY = 
'__hash_size__'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#hash ⇒ Object (readonly)

Returns the value of attribute hash.



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# File 'lib/active_support/xml_mini/nokogirisax.rb', line 22

def hash
  @hash
end

Instance Method Details

#characters(string) ⇒ Object Also known as: cdata_block 



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# File 'lib/active_support/xml_mini/nokogirisax.rb', line 61

def characters(string)
  current_hash[CONTENT_KEY] << string
end

#current_hash ⇒ Object 



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# File 'lib/active_support/xml_mini/nokogirisax.rb', line 24

def current_hash
  @hash_stack.last
end

#end_document ⇒ Object 



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# File 'lib/active_support/xml_mini/nokogirisax.rb', line 33

def end_document
  raise "Parse stack not empty!" if @hash_stack.size > 1
end

#end_element(name) ⇒ Object 



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# File 'lib/active_support/xml_mini/nokogirisax.rb', line 54

def end_element(name)
  if current_hash.length > current_hash.delete(HASH_SIZE_KEY) && current_hash[CONTENT_KEY].blank? || current_hash[CONTENT_KEY] == ''
    current_hash.delete(CONTENT_KEY)
  end
  @hash_stack.pop
end

#error(error_message) ⇒ Object 



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# File 'lib/active_support/xml_mini/nokogirisax.rb', line 37

def error(error_message)
  raise error_message
end

#start_document ⇒ Object 



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# File 'lib/active_support/xml_mini/nokogirisax.rb', line 28

def start_document
  @hash = {}
  @hash_stack = [@hash]
end

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



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# File 'lib/active_support/xml_mini/nokogirisax.rb', line 41

def start_element(name, attrs = [])
  new_hash = { CONTENT_KEY => '' }.merge(Hash[attrs])
  new_hash[HASH_SIZE_KEY] = new_hash.size + 1

  case current_hash[name]
    when Array then current_hash[name] << new_hash
    when Hash  then current_hash[name] = [current_hash[name], new_hash]
    when nil   then current_hash[name] = new_hash
  end

  @hash_stack.push(new_hash)
end