Class: Expressir::Express::Builders::ExpressionBuilder

Inherits:
Object
  • Object
show all
Includes:
Helpers
Defined in:
lib/expressir/express/builders/expression_builder.rb

Overview

Builds expression nodes (binary, unary, query, interval, etc.).

Instance Method Summary collapse

Methods included from Helpers

#apply_qualifier, #extract_id_ref, #extract_interval_op, #extract_nested_text, #extract_operator, #extract_rel_op, #extract_text, #extract_unary_op, #first_value

Instance Method Details

#build_actual_parameter_list(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 288

def build_actual_parameter_list(ast_data)
  list_data = ast_data[:list_of_parameter] || ast_data[:parameter]

  case list_data
  when Hash
    Builder.build_children(list_data[:parameter])
  when Array
    list_data.flat_map do |item|
      if item.is_a?(Hash) && item[:parameter]
        Builder.build_children(item[:parameter])
      else
        []
      end
    end
  else
    []
  end
end

#build_aggregate_initializer(ast_data) ⇒ Object

Aggregate initializer



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# File 'lib/expressir/express/builders/expression_builder.rb', line 347

def build_aggregate_initializer(ast_data)
  list_data = ast_data[:list_of_element] || ast_data
  elements = if list_data.is_a?(Array)
               list_data
             else
               list_data[:element]
             end

  items = elements ? Builder.build_children(elements) : []
  Expressir::Model::Expressions::AggregateInitializer.new(items: items.compact)
end

#build_aggregate_source(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 342

def build_aggregate_source(ast_data)
  Builder.build_optional(ast_data[:simple_expression])
end

#build_binary_expression(operands, operators) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 241

def build_binary_expression(operands, operators)
  return operands.first if operands.length == 1
  return nil if operands.empty? || operators.empty?

  result = Expressir::Model::Expressions::BinaryExpression.new(
    operator: operators.first,
    operand1: operands.first,
    operand2: operands[1],
  )

  (2...operands.length).each do |i|
    result = Expressir::Model::Expressions::BinaryExpression.new(
      operator: operators[i - 1],
      operand1: result,
      operand2: operands[i],
    )
  end
  result
end

#build_constant_factor(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 167

def build_constant_factor(ast_data)
  if ast_data[:built_in_constant]
    Builder.build_node(:built_in_constant, ast_data[:built_in_constant])
  elsif ast_data[:constant_ref]
    Builder.build_node(:constant_ref, ast_data[:constant_ref])
  end
end

#build_element(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 359

def build_element(ast_data)
  expression = if ast_data[:expression]
                 Builder.build({ expression: ast_data[:expression] })
               end
  repetition = Builder.build_optional(ast_data[:repetition])

  if repetition
    Expressir::Model::Expressions::AggregateInitializerItem.new(
      expression: expression,
      repetition: repetition,
    )
  else
    expression
  end
end

#build_entity_constructor(ast_data) ⇒ Object

Entity constructor



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# File 'lib/expressir/express/builders/expression_builder.rb', line 314

def build_entity_constructor(ast_data)
  entity_ref = Builder.build_optional(ast_data[:entity_ref])
  params = if ast_data[:actual_parameter_list]
             Builder.build_node(:actual_parameter_list,
                                ast_data[:actual_parameter_list])
           else
             []
           end

  Expressir::Model::Expressions::FunctionCall.new(
    function: entity_ref,
    parameters: params,
  )
end

#build_expression(ast_data) ⇒ Object

Expression



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# File 'lib/expressir/express/builders/expression_builder.rb', line 11

def build_expression(ast_data)
  left = if ast_data[:simple_expression]
           Builder.build_simple_expression(ast_data[:simple_expression])
         elsif ast_data[:logical_expression]
           Builder.build_simple_expression(ast_data[:logical_expression][:simple_expression])
         end

  if ast_data[:rel_op_extended] && ast_data[:rhs]
    op = build_rel_op_extended(ast_data[:rel_op_extended])
    right = Builder.build(ast_data[:rhs])
    Expressir::Model::Expressions::BinaryExpression.new(
      operator: op,
      operand1: left,
      operand2: right,
    )
  else
    left
  end
end

#build_factor(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 99

def build_factor(ast_data)
  return nil unless ast_data[:simple_factor]

  Builder.build_simple_factor(ast_data[:simple_factor])
end

#build_function_call(ast_data) ⇒ Object

Function call



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# File 'lib/expressir/express/builders/expression_builder.rb', line 262

def build_function_call(ast_data)
  func_ref = if ast_data[:built_in_function]
               Builder.build_node(:built_in_function,
                                  ast_data[:built_in_function])
             elsif ast_data[:function_ref]
               Builder.build_node(:function_ref,
                                  ast_data[:function_ref])
             end

  params = if ast_data[:actual_parameter_list]
             Builder.build_node(:actual_parameter_list,
                                ast_data[:actual_parameter_list])
           else
             []
           end

  if params.empty?
    func_ref
  else
    Expressir::Model::Expressions::FunctionCall.new(
      function: func_ref,
      parameters: params,
    )
  end
end

#build_interval(ast_data) ⇒ Object

Interval



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# File 'lib/expressir/express/builders/expression_builder.rb', line 380

def build_interval(ast_data)
  low = Builder.build_optional(ast_data[:interval_low])
  item = Builder.build_optional(ast_data[:interval_item])
  high = Builder.build_optional(ast_data[:interval_high])

  op1 = extract_interval_op(ast_data[:interval_op])
  op2_data = ast_data[:interval_op2]
  op2 = if op2_data.is_a?(Hash) && op2_data[:interval_op]
          extract_interval_op(op2_data[:interval_op])
        else
          extract_interval_op(op2_data)
        end

  Expressir::Model::Expressions::Interval.new(
    low: low,
    operator1: op1,
    item: item,
    operator2: op2,
    high: high,
  )
end

#build_interval_high(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 406

def build_interval_high(ast_data)
  Builder.build_optional(ast_data[:simple_expression])
end

#build_interval_item(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 410

def build_interval_item(ast_data)
  Builder.build_optional(ast_data[:simple_expression])
end

#build_interval_low(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 402

def build_interval_low(ast_data)
  Builder.build_optional(ast_data[:simple_expression])
end

#build_logical_expression(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 31

def build_logical_expression(ast_data)
  Builder.build_simple_expression(ast_data[:simple_expression])
end

#build_numeric_expression(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 35

def build_numeric_expression(ast_data)
  Builder.build_simple_expression(ast_data[:simple_expression])
end

#build_parameter(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 307

def build_parameter(ast_data)
  if ast_data[:expression]
    Builder.build({ expression: ast_data[:expression] })
  end
end

#build_population(ast_data, qualifiers = nil) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 214

def build_population(ast_data, qualifiers = nil)
  ref = Builder.build_node(:entity_ref, ast_data[:entity_ref])
  return ref unless qualifiers

  Builder.ensure_array(qualifiers).each do |qual|
    qual_result = Builder.build_node(:qualifier, qual)
    ref = apply_qualifier(ref, qual_result)
  end
  ref
end

#build_primary(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 175

def build_primary(ast_data)
  if ast_data[:literal]
    Builder.build_node(:literal, ast_data[:literal])
  elsif ast_data[:qualifiable_factor]
    build_qualifiable_factor(ast_data[:qualifiable_factor],
                             ast_data[:qualifier])
  elsif ast_data[:population]
    build_population(ast_data[:population], ast_data[:qualifier])
  elsif ast_data[:expression]
    Builder.build_expression(ast_data[:expression])
  end
end

#build_qualifiable_factor(ast_data, qualifiers = nil) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 188

def build_qualifiable_factor(ast_data, qualifiers = nil)
  ref = nil
  if ast_data[:constant_factor]
    ref = Builder.build_node(:constant_factor,
                             ast_data[:constant_factor])
  elsif ast_data[:function_call]
    ref = Builder.build_node(:function_call, ast_data[:function_call])
  else
    %i[constant_ref function_ref general_ref parameter_ref type_label_ref
       variable_ref attribute_ref entity_ref type_ref enumeration_ref].each do |key|
      if ast_data[key]
        ref = Builder.build_node(key, ast_data[key])
        break
      end
    end
  end

  return ref unless qualifiers

  Builder.ensure_array(qualifiers).each do |qual|
    qual_result = Builder.build_node(:qualifier, qual)
    ref = apply_qualifier(ref, qual_result)
  end
  ref
end

#build_qualifier(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 225

def build_qualifier(ast_data)
  data = ast_data[:qualifier] || ast_data
  if data[:attribute_qualifier]
    Builder.build_node(:attribute_qualifier,
                       data[:attribute_qualifier])
  elsif data[:group_qualifier]
    Builder.build_node(:group_qualifier, data[:group_qualifier])
  elsif data[:index_qualifier]
    Builder.build_node(:index_qualifier, data[:index_qualifier])
  end
end

#build_query_expression(ast_data) ⇒ Object

Query expression



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# File 'lib/expressir/express/builders/expression_builder.rb', line 330

def build_query_expression(ast_data)
  var_id = Builder.build_optional(ast_data[:variable_id])
  aggregate_source = Builder.build_optional(ast_data[:aggregate_source])
  logical_expr = Builder.build_optional(ast_data[:logical_expression])

  Expressir::Model::Expressions::QueryExpression.new(
    id: var_id,
    aggregate_source: aggregate_source,
    expression: logical_expr,
  )
end

#build_rel_op_extended(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 237

def build_rel_op_extended(ast_data)
  extract_rel_op(ast_data[:rel_op] || ast_data)
end

#build_repetition(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 375

def build_repetition(ast_data)
  Builder.build_optional(ast_data[:numeric_expression])
end

#build_simple_expression(ast_data) ⇒ Object

Simple expression (addition/subtraction chain)



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# File 'lib/expressir/express/builders/expression_builder.rb', line 40

def build_simple_expression(ast_data)
  return nil unless ast_data[:term]

  term = Builder.build_term(ast_data[:term])
  rhs = ast_data[:rhs]

  return term if rhs.nil? || (rhs.respond_to?(:empty?) && rhs.empty?)

  rhs_array = rhs.is_a?(Array) ? rhs : [rhs]

  operands = [term]
  operators = []

  rhs_array.each do |r|
    # Handle Hash.each yielding [key, value] arrays
    r = r.last if r.is_a?(Array) && r.length == 2

    next unless r.is_a?(Hash)

    item = r[:item] || r
    op_data = item[:operator]
    operators << extract_operator(op_data[:add_like_op]) if op_data
    if item[:term]
      operands << Builder.build_term(item[:term])
    end
  end

  build_binary_expression(operands, operators)
end

#build_simple_factor(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 105

def build_simple_factor(ast_data)
  return nil unless ast_data

  if ast_data[:primary]
    Builder.build_primary(ast_data[:primary])
  elsif ast_data[:simple_factor_expression]
    Builder.build_node(:simple_factor_expression,
                       ast_data[:simple_factor_expression])
  elsif ast_data[:simple_factor_unary_expression]
    Builder.build_node(:simple_factor_unary_expression,
                       ast_data[:simple_factor_unary_expression])
  elsif ast_data[:constant_factor]
    Builder.build_node(:constant_factor, ast_data[:constant_factor])
  elsif ast_data[:expression]
    Builder.build_expression(ast_data[:expression])
  elsif ast_data[:aggregate_initializer]
    Builder.build_node(:aggregate_initializer,
                       ast_data[:aggregate_initializer])
  elsif ast_data[:query_expression]
    Builder.build_node(:query_expression, ast_data[:query_expression])
  elsif ast_data[:entity_constructor]
    Builder.build_node(:entity_constructor,
                       ast_data[:entity_constructor])
  elsif ast_data[:interval]
    Builder.build_node(:interval, ast_data[:interval])
  elsif ast_data[:string_literal]
    Builder.build_node(:string_literal, ast_data[:string_literal])
  elsif ast_data[:enumeration_reference]
    Builder.build_node(:enumeration_reference,
                       ast_data[:enumeration_reference])
  end
end

#build_simple_factor_expression(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 138

def build_simple_factor_expression(ast_data)
  if ast_data[:primary]
    Builder.build_primary(ast_data[:primary])
  elsif ast_data[:expression]
    Builder.build_expression(ast_data[:expression])
  end
end

#build_simple_factor_unary_expression(ast_data) ⇒ Object 



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# File 'lib/expressir/express/builders/expression_builder.rb', line 146

def build_simple_factor_unary_expression(ast_data)
  op = extract_unary_op(ast_data[:unary_op])
  operand = if ast_data[:simple_factor]
              Builder.build_simple_factor(ast_data[:simple_factor])
            elsif ast_data[:simple_factor_expression]
              Builder.build_node(:simple_factor_expression,
                                 ast_data[:simple_factor_expression])
            elsif ast_data[:primary]
              Builder.build_primary(ast_data[:primary])
            end

  if op
    Expressir::Model::Expressions::UnaryExpression.new(
      operator: op,
      operand: operand,
    )
  else
    operand
  end
end

#build_term(ast_data) ⇒ Object

Term (multiplication/division chain)



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# File 'lib/expressir/express/builders/expression_builder.rb', line 71

def build_term(ast_data)
  return nil unless ast_data[:factor]

  factor = Builder.build_factor(ast_data[:factor])
  rhs = ast_data[:rhs]

  return factor if rhs.nil? || (rhs.respond_to?(:empty?) && rhs.empty?)

  rhs_array = rhs.is_a?(Array) ? rhs : [rhs]

  operands = [factor]
  operators = []

  rhs_array.each do |r|
    # Handle Hash.each yielding [key, value] arrays
    r = r.last if r.is_a?(Array) && r.length == 2

    next unless r.is_a?(Hash)

    item = r[:item] || r
    op_data = item[:multiplication_like_op] || item[:mul_like_op]
    operators << extract_operator(op_data) if op_data
    operands << Builder.build_factor(item[:factor]) if item[:factor]
  end

  build_binary_expression(operands, operators)
end