Class: VORuby::ADQL::UserDefinedFunction

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

Overview

Represents user defined function expressions.

Instance Attribute Summary collapse

Attributes inherited from ScalarExpression

#value

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from ScalarExpression

#is_scalar?

Constructor Details

#initialize(name, params = nil) ⇒ UserDefinedFunction

Returns a new instance of UserDefinedFunction.



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# File 'lib/voruby/adql/adql.rb', line 2590

def initialize(name, params=nil)
  self.name = name
  self.params = params
end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/voruby/adql/adql.rb', line 2587

def name
  @name
end

#params ⇒ Object

Returns the value of attribute params.



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# File 'lib/voruby/adql/adql.rb', line 2588

def params
  @params
end

Class Method Details

.from_xml(node) ⇒ Object 



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# File 'lib/voruby/adql/adql.rb', line 2612

def self.from_xml(node)
  name = REXML::XPath.first(node, 'Name').text
  params = []
  node.elements.each('Params') do |param_node|
    params.push(ScalarExpression.from_xml(param_node))
  end
  params = nil if params.size < 1
  return UserDefinedFunction.new(name, params)
end

Instance Method Details

#to_adqls ⇒ Object 



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# File 'lib/voruby/adql/transforms.rb', line 539

def to_adqls
  params = ''
  if self.params and self.params.size > 0
    params = self.params.collect{|x| x.to_adqls}.join(', ')
  end
  "#{self.name}(#{params})"
end

#to_s ⇒ Object 



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# File 'lib/voruby/adql/adql.rb', line 2607

def to_s
  params = self.params.collect{|x| x.to_s}.join('|')
  "{name=#{self.name},params=#{params}}"
end