package br.com.caelum.stella.validation;
import java.util.ArrayList;
import java.util.List;
import br.com.caelum.stella.MessageProducer;
import br.com.caelum.stella.SimpleMessageProducer;
import br.com.caelum.stella.ValidationMessage;
abstract class AbstractValidator<T> implements Validator<T> {
private final MessageProducer messageProducer;
public AbstractValidator() {
this.messageProducer = new SimpleMessageProducer();
}
public AbstractValidator(MessageProducer messageProducer) {
this.messageProducer = messageProducer;
}
protected List<ValidationMessage> generateValidationMessages(
List<InvalidValue> invalidValues) {
List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
for (InvalidValue invalidValue : invalidValues) {
ValidationMessage message = messageProducer
.getMessage(invalidValue);
messages.add(message);
}
return messages;
}
public List<ValidationMessage> invalidMessagesFor(T value) {
List<InvalidValue> invalidValues = getInvalidValues(value);
List<ValidationMessage> messages = generateValidationMessages(invalidValues);
return messages;
}
public void assertValid(T value) {
List<InvalidValue> errors = getInvalidValues(value);
if (!errors.isEmpty()) {
throw new InvalidStateException(generateValidationMessages(errors));
}
}
protected abstract List<InvalidValue> getInvalidValues(T value);
}