pascalinterpreter.operators
Class Add

java.lang.Object
  pascalinterpreter.Operator
      pascalinterpreter.BinaryOperator
          pascalinterpreter.operators.Arithmetic
              pascalinterpreter.operators.Add

public class Add

extends Arithmetic

Represents a singleton.

Field Summary

private static Add

instance Holds singleton instance

Fields inherited from class pascalinterpreter.Operator

OP_REG_VAR_NAME

Constructor Summary

private

Add() prevents instantiation

Method Summary

protected double	compute(double opL, double opR) Metoda oblicza wartosc wyrazenia.
protected java.lang.String	compute(java.lang.String opL, java.lang.String opR) Metoda wykonuje operację konkatencaji łańcuchów String
void	execute(Variable operandL, Variable operandR)
static Add	getInstance() Returns the singleton instance.

Methods inherited from class pascalinterpreter.operators.Arithmetic

Methods inherited from class pascalinterpreter.BinaryOperator

execInitialize, isPossible, makeConversion, parseDouble

Methods inherited from class pascalinterpreter.Operator

getRegistry, setRegistry, setRegistry, setRegistry, setRegistry

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

instance

private static Add instance

Holds singleton instance

Constructor Detail

Add

private Add()

prevents instantiation

Method Detail

getInstance

public static Add getInstance()

Returns the singleton instance.

Returns:

the singleton instance

execute

public void execute(Variable operandL,
                    Variable operandR)
             throws InternalException,
                    RuntimeException

Overrides:

execute in class Arithmetic

Throws:

InternalException

RuntimeException

compute

protected java.lang.String compute(java.lang.String opL,
                                   java.lang.String opR)

Metoda wykonuje operację konkatencaji łańcuchów String

Parameters:

opL - - łańcuch pierwszy.

opR - - łańcuch drugi.

Returns:

Połączone łańcuchy, przekazane jako parametry.

compute

protected double compute(double opL,
                         double opR)

Description copied from class: Arithmetic

Metoda oblicza wartosc wyrazenia. Wszystkie operacje, z wyjatkiem dodawania wykonywane sa na zmiennych typu double.

Specified by:

compute in class Arithmetic

Parameters:

opL - - lewy operand

opR - - prawy operand

Returns:

Wartość wyrażenia, w postaci liczby double.