Class: ActiveSupport::XmlMini_LibXMLSAX::HashBuilder

Inherits:
Object
  • Object
show all
Includes:
LibXML::XML::SaxParser::Callbacks
Defined in:
activesupport/lib/active_support/xml_mini/libxmlsax.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

#hashObject (readonly)

Returns the value of attribute hash


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# File 'activesupport/lib/active_support/xml_mini/libxmlsax.rb', line 18

def hash
  @hash
end

Instance Method Details

#current_hashObject


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# File 'activesupport/lib/active_support/xml_mini/libxmlsax.rb', line 20

def current_hash
  @hash_stack.last
end

#on_characters(string) ⇒ Object Also known as: on_cdata_block


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

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

#on_end_documentObject


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# File 'activesupport/lib/active_support/xml_mini/libxmlsax.rb', line 29

def on_end_document
  @hash = @hash_stack.pop
  @hash.delete(CONTENT_KEY)
end

#on_end_element(name) ⇒ Object


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# File 'activesupport/lib/active_support/xml_mini/libxmlsax.rb', line 47

def on_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

#on_start_documentObject


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

def on_start_document
  @hash = { CONTENT_KEY => '' }
  @hash_stack = [@hash]
end

#on_start_element(name, attrs = {}) ⇒ Object


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# File 'activesupport/lib/active_support/xml_mini/libxmlsax.rb', line 34

def on_start_element(name, attrs = {})
  new_hash = { CONTENT_KEY => '' }.merge!(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