Class: VORuby::ADQL::OrderExpression

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

Overview

List of expressions in which order the results should be provided.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(items) ⇒ OrderExpression

Returns a new instance of OrderExpression.



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# File 'lib/voruby/adql/adql.rb', line 2320

def initialize(items)
  self.items = items
end

Instance Attribute Details

#items ⇒ Object

Returns the value of attribute items.



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# File 'lib/voruby/adql/adql.rb', line 2318

def items
  @items
end

Class Method Details

.from_xml(node) ⇒ Object 



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# File 'lib/voruby/adql/adql.rb', line 2339

def self.from_xml(node)
  items = []
  node.elements.each('Item') do |item_node|
    item = Item.from_xml(item_node)
    items.push(item)
  end

  return OrderExpression.new(items)
end

Instance Method Details

#to_adqls ⇒ Object 



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# File 'lib/voruby/adql/transforms.rb', line 470

def to_adqls
  items = self.items.collect{|x| x.to_adqls}.join(', ')
  "ORDER BY #{items}"
end

#to_s ⇒ Object 



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# File 'lib/voruby/adql/adql.rb', line 2334

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