Class: RDF::Literal::Date
- Inherits:
-
Temporal
- Object
- RDF::Literal
- Temporal
- RDF::Literal::Date
- Defined in:
- lib/rdf/model/literal/date.rb
Overview
A date literal.
Constant Summary collapse
- DATATYPE =
RDF::URI("http://www.w3.org/2001/XMLSchema#date")
- GRAMMAR =
%r(\A(#{YEARFRAG}-#{MONTHFRAG}-#{DAYFRAG})(#{TZFRAG})?\z).freeze
- FORMAT =
'%Y-%m-%d'.freeze
Constants inherited from Temporal
Temporal::DAYFRAG, Temporal::EODFRAG, Temporal::HOURFRAG, Temporal::MINUTEFRAG, Temporal::MONTHFRAG, Temporal::SECONDFRAG, Temporal::TZFRAG, Temporal::YEARFRAG, Temporal::ZONE_GRAMMAR
Constants inherited from RDF::Literal
FALSE, TRUE, XSD_STRING, ZERO
Instance Attribute Summary
Attributes inherited from RDF::Literal
#datatype, #direction, #language
Instance Method Summary collapse
-
#humanize(lang = :en) ⇒ String
Returns a human-readable value for the literal.
-
#initialize(value, datatype: nil, lexical: nil, **options) ⇒ Date
constructor
Internally, a
Date
is represented using a native::DateTime
object at midnight.
Methods inherited from Temporal
#+, #-, #<=>, #==, #adjust_to_timezone, #adjust_to_timezone!, #canonicalize!, #day, #hours, #milliseconds?, #minutes, #month, #seconds, #timezone, #timezone?, #to_s, #tz, #valid?, #year
Methods inherited from RDF::Literal
#<=>, #==, #canonicalize!, #compatible?, #comperable_datatype2?, #comperable_datatype?, #datatype?, #direction?, #english?, #eql?, #escape, #hash, #inspect, #language?, #literal?, #method_missing, #object, #plain?, #respond_to_missing?, #simple?, #squish, #squish!, #to_s, #valid?, #validate!, #value, #value_hash
Methods included from Term
#<=>, #==, #compatible?, #eql?, #escape, #term?, #terms, #to_base, #to_term
Methods included from Value
#anonymous?, #canonicalize, #canonicalize!, #constant?, #graph?, #inspect, #inspect!, #invalid?, #iri?, #list?, #literal?, #node?, #resource?, #start_with?, #statement?, #term?, #to_nquads, #to_ntriples, #to_rdf, #to_term, #type_error, #uri?, #valid?, #validate!, #variable?
Constructor Details
#initialize(value, datatype: nil, lexical: nil, **options) ⇒ Date
If initialized using the #to_datetime
method, time component is unchanged. Otherewise, it is set to 00:00 (midnight).
Internally, a Date
is represented using a native ::DateTime
object at midnight. If initialized from a ::Date
, there is no timezone component, If initialized from a ::DateTime
, the timezone is taken from that native object, otherwise, a timezone (or no timezone) is taken from the string representation having a matching zzzzzz
component.
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# File 'lib/rdf/model/literal/date.rb', line 20 def initialize(value, datatype: nil, lexical: nil, **) @datatype = RDF::URI(datatype || self.class.const_get(:DATATYPE)) @string = lexical || (value if value.is_a?(String)) @object = case when value.class == ::Date @zone = nil # Use midnight as midpoint of the interval ::DateTime.parse(value.strftime('%FT00:00:00')) when value.respond_to?(:to_datetime) dt = value.to_datetime @zone = dt.zone dt else md = value.to_s.match(GRAMMAR) _, dt, tz = Array(md) if tz @zone = tz == 'Z' ? '+00:00' : tz else @zone = nil # No timezone end # Use midnight as midpoint of the interval ::DateTime.parse("#{dt}T00:00:00#{@zone}") end rescue ::DateTime.new end |
Dynamic Method Handling
This class handles dynamic methods through the method_missing method in the class RDF::Literal
Instance Method Details
#humanize(lang = :en) ⇒ String
Returns a human-readable value for the literal
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# File 'lib/rdf/model/literal/date.rb', line 50 def humanize(lang = :en) d = object.strftime("%A, %d %B %Y") if timezone? d += if @zone == '+00:00' " UTC" else " #{@zone}" end end d end |