Validators are implemented for each workflow execution status Validators are applied in production code

public class ValidatorFactory {

    public interface Validator {
        public void validate();
    }

    public class WorkflowValidatorFactory {
        private Map<String, Validator> validatorMap = new HashMap<>();

        public WorkflowValidatorFactory() {
            validatorMap.put("SUBMITTED", new SubmittedValidator());
            validatorMap.put("IN_PROGRESS", new InProgressValidator());
            validatorMap.put("COMPLETED", new CompletedValidator());
        }

        public Validator getValidator(String status) {
            return validatorMap.get(status);
        }
    }

    public class SubmittedValidator implements Validator {
        @Override
        public void validate() {
            //do validation logic
        }
    }

    public class InProgressValidator implements Validator {
        @Override
        public void validate() {
            //do validation logic
        }
    }

    public class CompletedValidator implements Validator {
        @Override
        public void validate() {
            //do validation logic