Module: ScopedSearch::QueryLanguage::AST

Defined in:
lib/scoped_search/query_language/ast.rb

Defined Under Namespace

Classes: LeafNode, LogicalOperatorNode, Node, OperatorNode

Class Method Summary collapse

Class Method Details

.from_array(arg) ⇒ Object

Constructs an AST from an array notation.



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# File 'lib/scoped_search/query_language/ast.rb', line 4

def self.from_array(arg) 
  if arg.kind_of?(Array)
    operator = arg.shift
    case operator
    when :and, :or
      LogicalOperatorNode.new(operator, arg.map { |c| from_array(c) })
    when Symbol
      OperatorNode.new(operator, arg.map { |c| from_array(c) })
    else
      raise ScopedSearch::Exception, "Not a valid array representation of an AST!"
    end
  else
    return LeafNode.new(arg)
  end
end