Class: VORuby::ADQL::V1_0::UnaryExpr

Inherits:
ScalarExpression show all
Defined in:
lib/voruby/adql/1.0/adql.rb

Overview

Represents an unary expression such as -(a.ra)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from SerializableToXml

#element

Constructor Details

#initialize(oper, arg) ⇒ UnaryExpr

Returns a new instance of UnaryExpr.



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# File 'lib/voruby/adql/1.0/adql.rb', line 151

def initialize(oper, arg)
  super()
  self.oper = oper
  self.arg = arg
end

Instance Attribute Details

#arg ⇒ Object

Returns the value of attribute arg.



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# File 'lib/voruby/adql/1.0/adql.rb', line 147

def arg
  @arg
end

#oper ⇒ Object

Returns the value of attribute oper.



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# File 'lib/voruby/adql/1.0/adql.rb', line 147

def oper
  @oper
end

Class Method Details

.from_xml(xml) ⇒ Object 



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# File 'lib/voruby/adql/1.0/adql.rb', line 191

def self.from_xml(xml)
  root = element_from(xml)

  self.new(
    UnaryOperator.new(root.attributes.get_attribute_ns(obj_ns.uri, 'Oper').value),
    xml_to_obj(REXML::XPath.first(root, 'x:Arg', {'x' => obj_ns.uri}))
  )
end

.xml_type ⇒ Object 



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# File 'lib/voruby/adql/1.0/adql.rb', line 149

def self.xml_type; 'unaryExprType' end

Instance Method Details

#==(e) ⇒ Object 



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# File 'lib/voruby/adql/1.0/adql.rb', line 186

def ==(e)
  self.oper == e.oper and
  self.arg == e.arg
end

#to_s ⇒ Object 



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# File 'lib/voruby/adql/1.0/adql.rb', line 182

def to_s
  "#{self.oper}(#{self.arg})"
end

#to_xml(name = nil) ⇒ Object 



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# File 'lib/voruby/adql/1.0/adql.rb', line 172

def to_xml(name=nil)
  el = super(name)
  
  el.attributes["#{obj_ns.prefix}:Oper"] = self.oper.to_s
  el.add_element(self.arg.to_xml('Arg'))
  
  collapse_namespaces(el)
  el
end