Class: Canql::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/canql/parser.rb

Overview

This class simplifies CANQL queries by wrapping them in a little syntactic sugar.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(query) ⇒ Parser

Returns a new instance of Parser.

Raises:

  • (ArgumentError) 


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# File 'lib/canql/parser.rb', line 11

def initialize(query)
  raise ArgumentError unless query.is_a?(String)

  @parser = CanqlParser.new
  @result = @parser.parse(query.downcase)

  return if valid?
  # FIXME: should log "Parser failed parsing \"#{query}\": #{@parser.failure_reason} " \
  #                   "(line: #{@parser.failure_line}, column: #{@parser.failure_column})"
end

Instance Attribute Details

#parser ⇒ Object (readonly)

Returns the value of attribute parser.



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# File 'lib/canql/parser.rb', line 9

def parser
  @parser
end

Instance Method Details

#failure_column ⇒ Object 



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# File 'lib/canql/parser.rb', line 34

def failure_column
  valid? ? nil : @parser.failure_column
end

#failure_line ⇒ Object 



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# File 'lib/canql/parser.rb', line 30

def failure_line
  valid? ? nil : @parser.failure_line
end

#failure_reason ⇒ Object 



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# File 'lib/canql/parser.rb', line 26

def failure_reason
  valid? ? nil : @parser.failure_reason
end

#meta_data ⇒ Object 



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# File 'lib/canql/parser.rb', line 38

def meta_data
  valid? ? @result.meta_data : {}
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/canql/parser.rb', line 22

def valid?
  !@result.nil?
end