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module TaliaCore
# Handling of RDF string values. These values can contain both locale (language)
# and type information. (E.g. "Some value^^string@en")
#
# This class will parse the value string an make all elements available as separate
# accessors.
class PropertyString < String
attr_accessor :type, :lang
# Create a new object by parsing the given property string
def self.parse(property_string)
self.new.parse(property_string)
end
# Create a new object from the given values. No parsing is done here.
def initialize(property_string = '', language = nil, type = nil)
@lang = language
@type = type
self.replace(property_string)
end
# Parses the given string into a PropertyString
def parse(property_string)
# First split for the type
type_split = property_string.split('^^')
# Check if any of the elements contains a language string
type_split = type_split.collect { |el| extract_lang(el) }
@type = (type_split.size > 1) ? type_split.last : nil
self.replace(type_split.first || '')
end
# Gives the "internal representation" - this should be equivalent
# to the string from which the object was created
def to_rdf
value = self.clone
value << '^^' << type if(type)
value << '@' << lang if(lang)
value
end
# Inspect shows the real content
def inspect
"\"#{self}\" <lang: #{lang.inspect} - type: #{type.inspect}>"
end
private
# Helper to extract a language string. The lang value, if any, will be added to the hash
def extract_lang(value)
lang_split = value.split('@')
@lang ||= (lang_split.size > 1) ? lang_split.last : nil
lang_split.first || ''
end
end
end
Version data entries
24 entries across 24 versions & 1 rubygems