Class: RdfContext::Duration

Inherits:
Object
  • Object
show all
Defined in:
lib/rdf_context/duration.rb

Instance Attribute Summary (collapse)

Class Method Summary (collapse)

Instance Method Summary (collapse)

Constructor Details

- (Duration) initialize(value)

  • Given an integer, assumes that it is milliseconds

  • Given a time, extract second

  • Given a Flaat, use value direcly

  • Given a String, parse as xsd:duration

Parameters:

  • value (Integer, Time, Float, String)

    (#to_i)



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# File 'lib/rdf_context/duration.rb', line 12

def initialize(value)
  case value
  when Hash
    @ne = value[:ne] || 1
    @yr = value[:yr] || value[:years] || 0
    @mo = value[:mo] || value[:months] || 0
    @da = value[:da] || value[:days] || 0
    @hr = value[:hr] || value[:hours] || 0
    @mi = value[:mi] || value[:minutes] || 0
    @se = value[:se] || value[:seconds] || 0
  when Duration
    @se = value.to_f
  when Numeric
    @se = value
  else
    @se = value.to_i
  end
  
  self.normalize
end

Instance Attribute Details

- (Object) da

Returns the value of attribute da



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# File 'lib/rdf_context/duration.rb', line 4

def da
  @da
end

- (Object) hr

Returns the value of attribute hr



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# File 'lib/rdf_context/duration.rb', line 4

def hr
  @hr
end

- (Object) mi

Returns the value of attribute mi



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# File 'lib/rdf_context/duration.rb', line 4

def mi
  @mi
end

- (Object) mo

Returns the value of attribute mo



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# File 'lib/rdf_context/duration.rb', line 4

def mo
  @mo
end

- (Object) ne

Returns the value of attribute ne



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# File 'lib/rdf_context/duration.rb', line 4

def ne
  @ne
end

- (Object) se

Returns the value of attribute se



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# File 'lib/rdf_context/duration.rb', line 4

def se
  @se
end

- (Object) yr

Returns the value of attribute yr



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# File 'lib/rdf_context/duration.rb', line 4

def yr
  @yr
end

Class Method Details

+ (Duration) parse(value)

Reverse convert from XSD version of duration XSD allows -P1111Y22M33DT44H55M66.666S with any combination in regular order We assume 1M == 30D, but are out of spec in this regard We only output up to hours

Parameters:

  • value (String)

    XSD formatted duration

Returns:



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# File 'lib/rdf_context/duration.rb', line 41

def self.parse(value)
  if value.to_s.match(/^(-?)P(\d+Y)?(\d+M)?(\d+D)?T?(\d+H)?(\d+M)?([\d\.]+S)?$/)
    hash = {}
    hash[:ne] = $1 == "-" ? -1 : 1
    hash[:yr] = $2.to_i
    hash[:mo] = $3.to_i
    hash[:da] = $4.to_i
    hash[:hr] = $5.to_i
    hash[:mi] = $6.to_i
    hash[:se] = $7.to_f
    value = hash
  end

  self.new(value)
end

Instance Method Details

- (Boolean) eql?(something) Also known as: ==

Parameters:

Returns:

  • (Boolean)


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# File 'lib/rdf_context/duration.rb', line 67

def eql?(something)
  case something
  when Duration
    self.to_f == something.to_f
  when String
    self.to_s(:xml) == something
  when Numeric
    self.to_f == something
  else
    false
  end
end

- (Object) normalize (protected)

Normalize representation by adding everything up and then breaking it back down again



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# File 'lib/rdf_context/duration.rb', line 114

def normalize
  s = self.to_f
  
  @ne = s < 0 ? -1 : 1
  s = s * @ne
  _mi, @se = s.divmod(60)
  _hr, @mi = _mi.to_i.divmod(60)
  _da, @hr = _hr.divmod(24)
  _mo, @da = _da.divmod(30)
  @yr, @mo = _mo.divmod(12)
end

- (Float) to_f

Returns:

  • (Float)


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# File 'lib/rdf_context/duration.rb', line 58

def to_f
  (((((@yr.to_i * 12 + @mo.to_i) * 30 + @da.to_i) * 24 + @hr.to_i) * 60 + @mi.to_i) * 60 + @se.to_f) * (@ne || 1)
end

- (Integer) to_i

Returns:

  • (Integer)


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# File 'lib/rdf_context/duration.rb', line 63

def to_i; Integer(self.to_f); end

- (String) to_s(format = nil)

Parameters:

  • format (Symbol) (defaults to: nil)

    Output format, :xml outputs in xmlschema mode, otherwise in Human form

Returns:



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# File 'lib/rdf_context/duration.rb', line 83

def to_s(format = nil)
  usec = (@se * 1000).to_i % 1000
  sec_str = usec > 0 ? "%2.3f" % @se : @se.to_i.to_s
  
  if format == :xml
    str = @ne < 0 ? "-P" : "P"
    str << "%dY" % @yr if @yr > 0
    str << "%dM" % @mo if @mo > 0
    str << "%dD" % @da if @da > 0
    str << "T" if @hr + @mi + @se > 0
    str << "%dH" % @hr if @hr > 0
    str << "%dM" % @mi if @mi > 0
    str << "#{sec_str}S" if @se > 0
  else
    ar = []
    ar << "%d years"    % @yr     if @yr > 0
    ar << "%d months"   % @mo     if @mo > 0
    ar << "%d days"     % @da     if @da > 0
    ar << "%d hours"    % @hr     if @hr > 0
    ar << "%d minutes"  % @mi     if @mi > 0
    ar << "%s seconds"  % sec_str if @se > 0
    last = ar.pop
    first = ar.join(", ")
    res = first.empty? ? last : "#{first} and #{last}"
    ne < 0 ? "#{res} ago" : res
  end
end