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Versions: 7
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Contents
module Expressir
module Model
class ModelElement
CLASS_KEY = '_class'
SOURCE_KEY = 'source'
def to_hash(options = {})
skip_empty = options[:skip_empty]
formatter = options[:formatter]
hash = {}
hash[CLASS_KEY] = self.class.name
instance_variables.select{|x| x != :@parent}.each_with_object(hash) do |variable, result|
key = variable.to_s.sub(/^@/, '')
value = instance_variable_get(variable)
# skip empty values (nil, empty array)
if !skip_empty or !(value.nil? or (value.is_a? Array and value.count == 0))
result[key] = if value.is_a? Array
value.map do |value|
if value.is_a? ModelElement
value.to_hash(options)
else
value
end
end
elsif value.is_a? ModelElement
value.to_hash(options)
else
value
end
end
end
if formatter
hash[SOURCE_KEY] = formatter.format(self)
end
hash
end
def self.from_hash(hash)
node_class = hash[CLASS_KEY]
node_options = hash.select{|x| x != CLASS_KEY}.each_with_object({}) do |(variable, value), result|
key = variable.to_sym
result[key] = if value.is_a? Array
value.map do |value|
if value.is_a? Hash
self.from_hash(value)
else
value
end
end
elsif value.is_a? Hash
self.from_hash(value)
else
value
end
end
node = Object.const_get(node_class).new(node_options)
if node.class.method_defined? :attach_parent_to_children
node.attach_parent_to_children
end
node
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems