package factory_pattern;

import java.util.HashMap;

import java.util.Map;

import java.util.Optional;

/**

* @Auther: qulingxiao

* @Date: 2020/6/13 11:20

* @Description:

*/

public class OperatorFactory {

private static Map<String, Operation> map = new HashMap<String, Operation>();

public static String add = "add";

public static String divide = "divide";

public static String multiply = "multiply";

public static String subtract = "subtract";

public static String modulo = "modulo";

static {

map.put("add", new Addition());

map.put("divide", new Division());

map.put("multiply", new Multiplication());

map.put("subtract", new Subtraction());

map.put("modulo", new Modulo());

}

public static Optional<Operation> getOperation (String operator) {

return Optional.ofNullable(map.get(operator));

}

}