Class: ActiveSupport::XmlMini_LibXMLSAX::HashBuilder

Inherits:
Object
  • Object
show all
Includes:
LibXML::XML::SaxParser::Callbacks
Defined in:
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

#hash ⇒ Object (readonly)

Returns the value of attribute hash.



19
20
21
 
# File 'lib/active_support/xml_mini/libxmlsax.rb', line 19

def hash
  @hash
end

Instance Method Details

#current_hash ⇒ Object 



21
22
23
 
# File 'lib/active_support/xml_mini/libxmlsax.rb', line 21

def current_hash
  @hash_stack.last
end

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



55
56
57
 
# File 'lib/active_support/xml_mini/libxmlsax.rb', line 55

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

#on_end_document ⇒ Object 



30
31
32
33
 
# File 'lib/active_support/xml_mini/libxmlsax.rb', line 30

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

#on_end_element(name) ⇒ Object 



48
49
50
51
52
53
 
# File 'lib/active_support/xml_mini/libxmlsax.rb', line 48

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_document ⇒ Object 



25
26
27
28
 
# File 'lib/active_support/xml_mini/libxmlsax.rb', line 25

def on_start_document
  @hash = { CONTENT_KEY => "".dup }
  @hash_stack = [@hash]
end

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



35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/active_support/xml_mini/libxmlsax.rb', line 35

def on_start_element(name, attrs = {})
  new_hash = { CONTENT_KEY => "".dup }.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