Class: Tnql::Parser

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

Overview

This class simplifies TNQL 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/tnql/parser.rb', line 9

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

  @parser = TnqlParser.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/tnql/parser.rb', line 7

def parser
  @parser
end

Instance Method Details

#diagnosis_range ⇒ Object 



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# File 'lib/tnql/parser.rb', line 36

def diagnosis_range
  tumour_diagnosisdate = meta_data['tumour.diagnosisdate']
  return nil unless tumour_diagnosisdate

  starts, ends = tumour_diagnosisdate[Tnql::LIMITS]
  Daterange.new(Date.parse(starts), Date.parse(ends))
end

#failure_column ⇒ Object 



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# File 'lib/tnql/parser.rb', line 32

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

#failure_line ⇒ Object 



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# File 'lib/tnql/parser.rb', line 28

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

#failure_reason ⇒ Object 



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# File 'lib/tnql/parser.rb', line 24

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

#messages ⇒ Object

check if any query conditions been ignored or modified



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# File 'lib/tnql/parser.rb', line 44

def messages # check if any query conditions been ignored or modified
  msg = ''.html_safe
  meta_data.each do |_canonical_name, filter|
    msg += filter[Tnql::MESSAGE] if filter.key?(Tnql::MESSAGE)
  end
  msg
end

#meta_data ⇒ Object 



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# File 'lib/tnql/parser.rb', line 52

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

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tnql/parser.rb', line 20

def valid?
  !@result.nil?
end