Class: MODL::Parser::Parsed

Inherits:
MODLParserBaseListener show all
Defined in:
lib/modl/parser/parsed.rb

Overview

This class represents a MODL parse tree for a given MODL object. It tries to process the parse tree as it is generated as much as possible to save revisiting nodes unnecessarily.

Many of the method names are generated by ANTLR4 so are not ruby style.

Defined Under Namespace

Classes: ParsedArray, ParsedArrayConditional, ParsedArrayConditionalReturn, ParsedArrayItem, ParsedArrayValueItem, ParsedCondition, ParsedConditionGroup, ParsedConditionTest, ParsedFalse, ParsedMap, ParsedMapConditional, ParsedMapConditionalReturn, ParsedMapItem, ParsedNbArray, ParsedNull, ParsedNumber, ParsedPair, ParsedPrimitive, ParsedQuoted, ParsedString, ParsedStructure, ParsedTopLevelConditional, ParsedTopLevelConditionalReturn, ParsedTrue, ParsedValue, ParsedValueConditional, ParsedValueConditionalReturn, ParsedValueItem

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from MODLParserBaseListener

#enterModl_array, #enterModl_array_conditional, #enterModl_array_conditional_return, #enterModl_array_item, #enterModl_array_value_item, #enterModl_condition, #enterModl_condition_group, #enterModl_condition_test, #enterModl_map, #enterModl_map_conditional, #enterModl_map_conditional_return, #enterModl_map_item, #enterModl_nb_array, #enterModl_operator, #enterModl_pair, #enterModl_primitive, #enterModl_structure, #enterModl_top_level_conditional, #enterModl_top_level_conditional_return, #enterModl_value, #enterModl_value_conditional, #enterModl_value_conditional_return, #enterModl_value_item, #enter_every_rule, #exitModl, #exitModl_array, #exitModl_array_conditional, #exitModl_array_conditional_return, #exitModl_array_item, #exitModl_array_value_item, #exitModl_condition, #exitModl_condition_group, #exitModl_condition_test, #exitModl_map, #exitModl_map_conditional, #exitModl_map_conditional_return, #exitModl_map_item, #exitModl_nb_array, #exitModl_operator, #exitModl_pair, #exitModl_primitive, #exitModl_structure, #exitModl_top_level_conditional, #exitModl_top_level_conditional_return, #exitModl_value, #exitModl_value_conditional, #exitModl_value_conditional_return, #exitModl_value_item, #exit_every_rule, #visit_error_node, #visit_terminal

Methods inherited from MODLParserListener

#enterModl_array, #enterModl_array_conditional, #enterModl_array_conditional_return, #enterModl_array_item, #enterModl_array_value_item, #enterModl_condition, #enterModl_condition_group, #enterModl_condition_test, #enterModl_map, #enterModl_map_conditional, #enterModl_map_conditional_return, #enterModl_map_item, #enterModl_nb_array, #enterModl_operator, #enterModl_pair, #enterModl_primitive, #enterModl_structure, #enterModl_top_level_conditional, #enterModl_top_level_conditional_return, #enterModl_value, #enterModl_value_conditional, #enterModl_value_conditional_return, #enterModl_value_item, #exitModl, #exitModl_array, #exitModl_array_conditional, #exitModl_array_conditional_return, #exitModl_array_item, #exitModl_array_value_item, #exitModl_condition, #exitModl_condition_group, #exitModl_condition_test, #exitModl_map, #exitModl_map_conditional, #exitModl_map_conditional_return, #exitModl_map_item, #exitModl_nb_array, #exitModl_operator, #exitModl_pair, #exitModl_primitive, #exitModl_structure, #exitModl_top_level_conditional, #exitModl_top_level_conditional_return, #exitModl_value, #exitModl_value_conditional, #exitModl_value_conditional_return, #exitModl_value_item

Constructor Details

#initialize(global = nil) ⇒ Parsed

Returns a new instance of Parsed.



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# File 'lib/modl/parser/parsed.rb', line 51

def initialize(global = nil)
  @global = global
  @structures = []
end

Instance Attribute Details

#global ⇒ Object

Returns the value of attribute global.



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# File 'lib/modl/parser/parsed.rb', line 49

def global
  @global
end

#structures ⇒ Object

Returns the value of attribute structures.



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# File 'lib/modl/parser/parsed.rb', line 48

def structures
  @structures
end

Class Method Details

.additional_string_processing(text) ⇒ Object 



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# File 'lib/modl/parser/parsed.rb', line 72

def self.additional_string_processing(text)
  # Special case for a possibly empty graved string ``
  unless text.nil?
    match_data = /^`([^`]*)`$/.match text
    return match_data[1] if match_data&.length&.positive?
  end
  text
end

.handle_empty_array_item ⇒ Object 



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# File 'lib/modl/parser/parsed.rb', line 1307

def self.handle_empty_array_item
  # Create something for the blank array item
  #
  # The problem is that we might not have any context to tell us what type we need to create
  # so this currently defaults to the nil value
  #
  # TODO : Is there a way to know the type to create or is nil always acceptable?
  array_item = ParsedArrayItem.new @global
  array_item.arrayValueItem = ParsedArrayValueItem.new @global
  array_item.arrayValueItem.primitive = ParsedPrimitive.new @global
  array_item.arrayValueItem.primitive.nilVal = ParsedNull.instance
  array_item
end

Instance Method Details

#enterModl(ctx) ⇒ Object 



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# File 'lib/modl/parser/parsed.rb', line 56

def enterModl(ctx)

  @global = GlobalParseContext.new if @global.nil?

  ctx_modl_structure = ctx.modl_structure
  ctx_modl_structure.each do |str|
    structure = ParsedStructure.new @global
    str.enter_rule(structure)
    @structures << structure
  end

  @structures = @global.structures + @structures

  @global
end

#extract_hash ⇒ Object

Convert the parse tree to a simpler structure suitable for JSON.generate.



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# File 'lib/modl/parser/parsed.rb', line 1449

def extract_hash
  result = []
  if @structures.length.positive?
    @structures.each do |s|
      value = s.extract_hash
      result << value unless value.nil?
    end
  else
    result = {}
  end
  case result.length
  when 0
    return nil
  when 1
    return result[0]
  end
  result
end