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require 'libxml'
# = XmlMini LibXML implementation
module ActiveSupport
module XmlMini_LibXML #:nodoc:
extend self
# Parse an XML Document string or IO into a simple hash using libxml.
# data::
# XML Document string or IO to parse
def parse(data)
if !data.respond_to?(:read)
data = StringIO.new(data || '')
end
LibXML::XML.default_keep_blanks = false
char = data.getc
if char.nil?
{}
else
data.ungetc(char)
LibXML::XML::Parser.io(data).parse.to_hash
end
end
end
end
module LibXML #:nodoc:
module Conversions #:nodoc:
module Document #:nodoc:
def to_hash
root.to_hash
end
end
module Node #:nodoc:
CONTENT_ROOT = '__content__'
LIB_XML_LIMIT = 30000000 # Hardcoded LibXML limit
# Convert XML document to hash
#
# hash::
# Hash to merge the converted element into.
def to_hash(hash={})
if text?
raise LibXML::XML::Error if content.length >= LIB_XML_LIMIT
hash[CONTENT_ROOT] = content
else
sub_hash = insert_name_into_hash(hash, name)
attributes_to_hash(sub_hash)
if array?
children_array_to_hash(sub_hash)
elsif yaml?
children_yaml_to_hash(sub_hash)
else
children_to_hash(sub_hash)
end
end
hash
end
protected
# Insert name into hash
#
# hash::
# Hash to merge the converted element into.
# name::
# name to to merge into hash
def insert_name_into_hash(hash, name)
sub_hash = {}
if hash[name]
if !hash[name].kind_of? Array
hash[name] = [hash[name]]
end
hash[name] << sub_hash
else
hash[name] = sub_hash
end
sub_hash
end
# Insert children into hash
#
# hash::
# Hash to merge the children into.
def children_to_hash(hash={})
each { |child| child.to_hash(hash) }
attributes_to_hash(hash)
hash
end
# Convert xml attributes to hash
#
# hash::
# Hash to merge the attributes into
def attributes_to_hash(hash={})
each_attr { |attr| hash[attr.name] = attr.value }
hash
end
# Convert array into hash
#
# hash::
# Hash to merge the array into
def children_array_to_hash(hash={})
hash[child.name] = map do |child|
returning({}) { |sub_hash| child.children_to_hash(sub_hash) }
end
hash
end
# Convert yaml into hash
#
# hash::
# Hash to merge the yaml into
def children_yaml_to_hash(hash = {})
hash[CONTENT_ROOT] = content unless content.blank?
hash
end
# Check if child is of type array
def array?
child? && child.next? && child.name == child.next.name
end
# Check if child is of type yaml
def yaml?
attributes.collect{|x| x.value}.include?('yaml')
end
end
end
end
LibXML::XML::Document.send(:include, LibXML::Conversions::Document)
LibXML::XML::Node.send(:include, LibXML::Conversions::Node)
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