Class: RDF::Literal::Numeric

Inherits:
RDF::Literal show all
Defined in:
lib/rdf/model/literal/numeric.rb

Overview

Shared methods and class ancestry for numeric literal classes.

Since:

  • 0.3.0

Direct Known Subclasses

Decimal, Double

Constant Summary

Constants inherited from RDF::Literal

FALSE, TRUE, ZERO

Instance Attribute Summary

Attributes inherited from RDF::Literal

#datatype, #language

Instance Method Summary collapse

Methods inherited from RDF::Literal

#canonicalize!, #compatible?, #comperable_datatype2?, #comperable_datatype?, #datatype?, #eql?, #escape, #hash, #humanize, #initialize, #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

This class inherits a constructor from RDF::Literal

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class RDF::Literal

Instance Method Details

#%(other) ⇒ RDF::Literal

Exponent − Performs remainder of self divided by other.

From the XQuery function math:mod.

Parameters:

Returns:

See Also:

Since:

  • 0.2.3


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# File 'lib/rdf/model/literal/numeric.rb', line 157

def %(other)
  if self.class == Double || [Double, ::Float].include?(other.class)
    self.class.new(to_f % other.to_f)
  elsif ((self.class == RDF::Literal::Float || other.class == RDF::Literal::Float) rescue false)
    self.class.new(to_f % other.to_f)
  elsif self.class == Decimal || other.class == Decimal
    self.class.new(to_d % (other.respond_to?(:to_d) ? other.to_d : BigDecimal(other.to_s)))
  else
    self.class.new(to_i % other.to_i)
  end
end

#*(other) ⇒ RDF::Literal::Numeric

Returns the product of self times other.

From the XQuery function op:numeric-multiply.


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# File 'lib/rdf/model/literal/numeric.rb', line 119

def *(other)
  if self.class == Double || [Double, ::Float].include?(other.class)
    RDF::Literal::Double.new(to_f * other.to_f)
  elsif ((self.class == RDF::Literal::Float || other.class == RDF::Literal::Float) rescue false)
    RDF::Literal::Float.new(to_f * other.to_f)
  elsif self.class == Decimal || other.class == Decimal
    RDF::Literal::Decimal.new(to_d * (other.respond_to?(:to_d) ? other.to_d : BigDecimal(other.to_s)))
  else
    RDF::Literal::Integer.new(to_i * other.to_i)
  end
end

#**(other) ⇒ RDF::Literal::Numeric

Exponent − Performs exponential (power) calculation on operators.

Promotes values, as necessary, with the result type depending on the input values.

From the XQuery function math:pow.


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# File 'lib/rdf/model/literal/numeric.rb', line 142

def **(other)
  RDF::Literal(object ** (other.is_a?(RDF::Literal::Numeric) ? other.object : other))
rescue ZeroDivisionError
  RDF::Literal::Double.new('INF')
end

#+(other) ⇒ RDF::Literal::Numeric

Note:

For xs:float or xs:double values, if one of the operands is a zero or a finite number and the other is INF or -INF, INF or -INF is returned. If both operands are INF, INF is returned. If both operands are -INF, -INF is returned. If one of the operands is INF and the other is -INF, NaN is returned.

Returns the sum of self plus other.

From the XQuery function op:numeric-add.


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# File 'lib/rdf/model/literal/numeric.rb', line 77

def +(other)
  if self.class == Double || [Double, ::Float].include?(other.class)
    RDF::Literal::Double.new(to_f + other.to_f)
  elsif ((self.class == RDF::Literal::Float || other.class == RDF::Literal::Float) rescue false)
    RDF::Literal::Float.new(to_f + other.to_f)
  elsif self.class == Decimal || other.class == Decimal
    RDF::Literal::Decimal.new(to_d + (other.respond_to?(:to_d) ? other.to_d : BigDecimal(other.to_s)))
  else
    RDF::Literal::Integer.new(to_i + other.to_i)
  end
end

#[email protected]RDF::Literal::Numeric

Returns self.

Returns:

Since:

  • 0.2.3


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# File 'lib/rdf/model/literal/numeric.rb', line 54

def [email protected]
  self # unary plus
end

#-(other) ⇒ RDF::Literal::Numeric

Returns the difference of self minus other.

From the XQuery function op:numeric-subtract.


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# File 'lib/rdf/model/literal/numeric.rb', line 98

def -(other)
  if self.class == Double || [Double, ::Float].include?(other.class)
    RDF::Literal::Double.new(to_f - other.to_f)
  elsif ((self.class == RDF::Literal::Float || other.class == RDF::Literal::Float) rescue false)
    RDF::Literal::Float.new(to_f - other.to_f)
  elsif self.class == Decimal || other.class == Decimal
    RDF::Literal::Decimal.new(to_d - (other.respond_to?(:to_d) ? other.to_d : BigDecimal(other.to_s)))
  else
    RDF::Literal::Integer.new(to_i - other.to_i)
  end
end

#[email protected]RDF::Literal::Numeric

Returns self negated.

Returns:

Since:

  • 0.2.3


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# File 'lib/rdf/model/literal/numeric.rb', line 63

def [email protected]
  self.class.new(-self.object)
end

#/(other) ⇒ RDF::Literal::Numeric

Returns the quotient of self divided by other.

As a special case, if the types of both $arg1 and $arg2 are xsd:integer, then the return type is xsd:decimal.

From the XQuery function op:numeric-divide.

Parameters:

Returns:

Raises:

  • (ZeroDivisionError)

    if divided by zero

See Also:

Since:

  • 0.2.3


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# File 'lib/rdf/model/literal/numeric.rb', line 182

def /(other)
  if self.class == Double || [Double, ::Float].include?(other.class)
    RDF::Literal::Double.new(to_f / other.to_f)
  elsif ((self.class == RDF::Literal::Float || other.class == RDF::Literal::Float) rescue false)
    RDF::Literal::Float.new(to_f / other.to_f)
  else
    RDF::Literal::Decimal.new(to_d / (other.respond_to?(:to_d) ? other.to_d : BigDecimal(other.to_s)))
  end
end

#<=>(other) ⇒ Integer

Compares this literal to other for sorting purposes.

Parameters:

  • other (Object)

Returns:

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 13

def <=>(other)
  # If lexically invalid, use regular literal testing
  return super unless self.valid? && (!other.respond_to?(:valid?) || other.valid?)

  case other
    when ::Numeric
      to_d <=> other
    when Double
      to_f <=> other.to_f
    when Numeric
      to_d <=> other.to_d
    else super
  end
end

#==(other) ⇒ Boolean

Returns true if this literal is equal to other.

Parameters:

  • other (Object)

Returns:

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 34

def ==(other)
  # If lexically invalid, use regular literal testing
  return super unless self.valid? && (!other.respond_to?(:valid?) || other.valid?)

  case other
  when Literal::Numeric
    (cmp = (self <=> other)) ? cmp.zero? : false
  when RDF::URI, RDF::Node
    # Interpreting SPARQL data-r2/expr-equal/eq-2-2, numeric can't be compared with other types
    type_error("unable to determine whether #{self.inspect} and #{other.inspect} are equivalent")
  else
    super
  end
end

#absRDF::Literal

Returns the absolute value of self.

From the XQuery function fn:abs.

Returns:

Raises:

  • (NotImplementedError)

    unless implemented in subclass

See Also:

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 200

def abs
  raise NotImplementedError
end

#acosDouble

Returns the arc cosine of the argument.


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# File 'lib/rdf/model/literal/numeric.rb', line 344

def acos
  Double.new(Math.acos(self.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#asinDouble

Returns the arc sine of the argument.


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# File 'lib/rdf/model/literal/numeric.rb', line 333

def asin
  Double.new(Math.asin(self.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#atanDouble

Returns the arc tangent of the argument.


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# File 'lib/rdf/model/literal/numeric.rb', line 355

def atan
  Double.new(Math.atan(self.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#atan2(arg) ⇒ Double

Returns the angle in radians subtended at the origin by the point on a plane with coordinates (x, y) and the positive x-axis.

Parameters:

Returns:

See Also:

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 367

def atan2(arg)
  Double.new(Math.atan2(self.to_f, arg.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#ceilRDF::Literal

Returns the smallest integer greater than or equal to self.

From the XQuery function fn:ceil.

Examples:

RDF::Literal(1).ceil            #=> RDF::Literal(1)

Returns:

See Also:

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 226

def ceil
  self
end

#cosDouble

Returns the cosine of the argument. The argument is an angle in radians.


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# File 'lib/rdf/model/literal/numeric.rb', line 311

def cos
  Double.new(Math.cos(self.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#expDouble

Returns the value of ex.


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# File 'lib/rdf/model/literal/numeric.rb', line 249

def exp
  Double.new(Math.exp(self.to_f))
end

#exp10Double

Returns the value of 10x.


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# File 'lib/rdf/model/literal/numeric.rb', line 258

def exp10
  Double.new(10**self.to_f)
end

#floorRDF::Literal

Returns the largest integer less than or equal to self.

From the XQuery function fn:floor.

Examples:

RDF::Literal(1).floor            #=> RDF::Literal(1)

Returns:

See Also:

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 240

def floor
  self
end

#logDouble

Returns the natural logarithm of the argument.


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# File 'lib/rdf/model/literal/numeric.rb', line 267

def log
  Double.new(Math.log(self.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#log10Double

Returns the base-ten logarithm of the argument.


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# File 'lib/rdf/model/literal/numeric.rb', line 278

def log10
  Double.new(Math.log10(self.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#roundRDF::Literal

Returns the number with no fractional part that is closest to the argument. If there are two such numbers, then the one that is closest to positive infinity is returned. An error is raised if arg is not a numeric value.

From the XQuery function fn:round.

Returns:

Raises:

  • (NotImplementedError)

    unless implemented in subclass

See Also:

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 212

def round
  raise NotImplementedError
end

#sinDouble

Returns the sine of the argument. The argument is an angle in radians.


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# File 'lib/rdf/model/literal/numeric.rb', line 300

def sin
  Double.new(Math.sin(self.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#sqrtDouble

Returns the non-negative square root of the argument.


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# File 'lib/rdf/model/literal/numeric.rb', line 289

def sqrt
  Double.new(Math.sqrt(self.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#tanDouble

Returns the tangent of the argument. The argument is an angle in radians.


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# File 'lib/rdf/model/literal/numeric.rb', line 322

def tan
  Double.new(Math.tan(self.to_f))
rescue Math::DomainError
  Double.new(::Float::NAN)
end

#to_dBigDecimal

Returns the value as a decimal number.

Returns:

  • (BigDecimal)

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 398

def to_d
  @object.respond_to?(:to_d) ? @object.to_d : BigDecimal(@object.to_s)
rescue FloatDomainError
  ::Float::NAN
end

#to_fFloat

Returns the value as a floating point number.

The usual accuracy limits and errors of binary float arithmetic apply.

Returns:

  • (Float)

See Also:

  • BigDecimal#to_f

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 390

def to_f
  @object.to_f
end

#to_iInteger Also known as: to_int, ord

Returns the value as an integer.

Returns:

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 377

def to_i
  @object.to_i
end

#to_rRational

Returns the value as a rational number.

Returns:

  • (Rational)

Since:

  • 0.3.0


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# File 'lib/rdf/model/literal/numeric.rb', line 408

def to_r
  @object.to_r
end