package gw.rating.flow.domain

uses gw.lang.reflect.IType
uses java.lang.Integer
uses gw.util.Pair

abstract class CalcStepOperand {
  protected var _opType : CalcStepOperatorType as readonly OperatorType
  protected var _numberOfLeftParentheses: int as readonly LeftParenthesis
  protected var _numberOfRightParentheses: int as readonly RightParenthesis
  protected var _highlightElement : RateRoutineHighlightElement as readonly HighlightElement
  protected var _start : Pair<Integer, Integer> as readonly Start
  protected var _end : Pair<Integer, Integer> as readonly End

  property get CodeSize(): int {
    return 1
  }

  construct(opType : CalcStepOperatorType, numLeft: int, numRight: int) {
    _opType = opType
    _numberOfLeftParentheses = numLeft
    _numberOfRightParentheses = numRight   
  }

  abstract function getDataType(context: GenerationContext) : IType
  abstract property get OperandType() : CalcStepOperandType
  
  final function generate(context: GenerationContext) {
    _start = context.beginCodeGen()
    context.append("(".repeat(_numberOfLeftParentheses))
    generateCode(context)
    context.append(")".repeat(_numberOfRightParentheses))
    _end = context.endCodeGen()
  }
  
  abstract function generateCode(context: GenerationContext)
}